Naval Brass Casting and Naval Brass Machined Parts – Manufacturer & Exporter from India
We are one of the leading manufacturers, suppliers, and exporters of Naval Brass castings and Naval Brass machined parts from India. We have been supplying Naval Brass components to the world market for 3 decades. Our foundry and machining facility, based in India, specializes in producing Naval Brass (C46400) castings and precision-machined components for the global marine, naval, defense, oil & gas, and industrial sectors. Naval Brass — also known as Tobin Bronze or CuZn38Sn1 — is a tin-bearing Copper-Zinc alloy renowned for its exceptional resistance to dezincification, seawater corrosion, and biofouling, making it the alloy of choice for demanding marine and offshore applications. We serve customers across the USA, UK, Europe, Australia, the Middle East, and Southeast Asia, offering made-to-drawing, made-to-sample, and standard casting and machining services. Our facility is equipped with modern sand casting, investment casting (lost wax), and centrifugal casting processes, followed by full CNC machining and finishing capabilities. Every batch is manufactured under a strict ISO 9001:2015-certified quality management system, with full material traceability, dimensional inspection reports, and chemical test certificates. Whether you need a small prototype run of 10 pieces or a production order of 10,000 pieces, we offer the flexibility, expertise, and global exposure to meet your requirements efficiently and competitively.
Naval Brass Material Grades – International Standards
Naval Brass is specified under multiple international standards. We supply castings and machined parts conforming to all major global grades:
| Standard | Designation | Cu % | Zn % | Sn % | Other | Form |
|---|---|---|---|---|---|---|
| USA – UNS | C46400 (Naval Brass) | 59–62 | Bal. | 0.5–1.0 | Pb ≤0.20 | Wrought / Cast |
| USA – UNS | C46500 (As-Naval) | 59–62 | Bal. | 0.5–1.0 | As 0.02–0.06 | Wrought |
| USA – ASTM | B21 (Naval Brass Rod) | 59–62 | Bal. | 0.5–1.0 | — | Rod / Bar |
| USA – ASTM | B171 C46400 (Sheet/Plate) | 59–62 | Bal. | 0.5–1.0 | — | Plate |
| UK – BS | CZ112 / BS EN 12165 | 60–63 | Bal. | 0.5–1.5 | Pb ≤0.2 | Wrought |
| Europe – EN | CuZn38Sn1 / CW712R | 60–63 | Bal. | 0.5–1.5 | Ni ≤0.3 | Wrought |
| Europe – EN | CuZn38Sn1As / CW711R | 60–63 | Bal. | 0.5–1.5 | As 0.02–0.15 | Wrought |
| Germany – DIN | CuZn38Sn1 / DIN 17660 | 60–63 | Bal. | 0.5–1.5 | Pb ≤0.2 | Wrought |
| Japan – JIS | C4641 (Naval Brass) | 59–62 | Bal. | 0.5–1.0 | — | Wrought |
| China – GB | HSn62-1 / GB/T 5231 | 60–63 | Bal. | 0.7–1.1 | — | Wrought |
| India – IS | HBrSn1 / IS 291 | 60–63 | Bal. | 0.5–1.5 | Pb ≤0.2 | Wrought |
| Cast – ASTM | B62 (Composition Bronze) | ~85 | 5 | 5 | Pb 5 | Casting |
| Cast – ASTM | B61 (Steam Bronze) | ~88 | — | 6 | Pb 1.5, Ni 1 | Casting |
| Cast – ASTM | B148 C95400 (Alum. Bronze) | ~83 | — | — | Al 10.5, Fe 4 | Casting |
Note: We also cast and machine Admiralty Brass (CuZn29As1 / C44300), Muntz Metal (CuZn40), and custom Copper-Zinc-Tin alloys as per customer-supplied specifications or drawings.
Naval Brass – Key Mechanical & Physical Properties
| Property | C46400 (Wrought) | Cast Naval Brass | Unit |
|---|---|---|---|
| Density | 8.41 | 8.40 | g/cm³ |
| Melting Point (Liquidus) | 900 | 895 | °C |
| Melting Point (Solidus) | 885 | 882 | °C |
| Tensile Strength (UTS) | 380–525 | 310–415 | MPa |
| Yield Strength (0.2%) | 170–275 | 140–200 | MPa |
| Elongation | 35–50 | 20–35 | % |
| Hardness (Brinell) | 100–145 | 80–120 | HB |
| Modulus of Elasticity | 100 | 97 | GPa |
| Thermal Conductivity | 116 | 113 | W/m·K |
| Electrical Conductivity | 26 | 24 | % IACS |
| Thermal Expansion (20–300°C) | 21.2 | 21.0 | µm/m·K |
| Machinability Rating | 30 | 40 | % (vs. CDA 360 = 100%) |
Manufacturing Processes & Machinery
Our integrated manufacturing facility covers every step from raw material melting to final inspection. We offer the following Naval Brass casting and machining processes:
Casting Processes:
| Process | Weight Range | Tolerance (As-Cast) | Surface Finish | Best Suited For |
|---|---|---|---|---|
| Green Sand Casting | 50 g – 100 kg | CT8–CT10 (ISO 8062) | Ra 12–25 µm | Large housings, valves, flanges, impellers |
| Shell Mould Casting | 100 g – 25 kg | CT7–CT9 | Ra 6–12 µm | Medium-precision brackets, bushings, fittings |
| Investment Casting (Lost Wax) | 10 g – 5 kg | CT5–CT7 | Ra 1.6–3.2 µm | Intricate marine hardware, connectors, decorative parts |
| Centrifugal Casting | 0.5 kg – 500 kg | CT8–CT10 | Ra 6–12 µm | Bushings, liners, pipes, propeller blanks, sleeves |
| Continuous Casting | Rod/tube: Ø10–150 mm | ±0.3–0.5 mm | Ra 3.2–6.3 µm | Bar stock, tube blanks for machining |
CNC Machining Processes:
- CNC Turning: Bar stock and cast blanks turned on CNC lathes (2-axis to 5-axis) for shafts, bushings, nipples, threaded connectors
- CNC Milling: 3-axis and 4-axis CNC machining centers for flanges, housings, pump bodies, and complex profiles
- CNC Drilling / Tapping: Multi-spindle drilling with UNC, UNF, NPT, BSP, metric thread tapping
- Swiss-Type Screw Machining: For high-volume small-diameter parts (Ø2–32 mm) such as fasteners, pins, and fittings
- Grinding & Honing: Surface grinding and cylindrical grinding for tight-tolerance bearing surfaces
- EDM / Wire-EDM: For complex cavities and internal profiles
Machinery Used:
- CNC Lathe machines (FANUC / Siemens controllers), capacity up to Ø500 mm × 2000 mm
- CNC Machining Centers (VMC/HMC), table size up to 1600 × 630 mm
- Swiss-type CNC screw machines (multi-spindle)
- Sand casting moulding machines (automatic and semi-automatic)
- Investment casting wax injection and dewax autoclaves
- Induction melting furnaces (200 kg to 1000 kg capacity)
- Centrifugal casting machines (horizontal and vertical)
- Spectro OES (Optical Emission Spectrometer) for alloy verification
- Coordinate Measuring Machine (CMM) for dimensional inspection
- Hardness testers (Brinell / Rockwell / Vickers)
- Surface roughness profilometers
- Ultrasonic testing (UT) and dye penetrant testing (DPT) equipment
Typical Naval Brass Parts Produced
We manufacture a comprehensive range of cast and machined Naval Brass components across industries. Some of the most common parts we produce include:
| Part Category | Typical Parts | Common Size Range |
|---|---|---|
| Marine Fittings | Seacock bodies, through-hull fittings, skin fittings, deck fittings, strum boxes | DN15 – DN200 (½” – 8″) |
| Valves & Valve Bodies | Gate valve bodies, globe valve bodies, ball valve bodies, check valve bodies, butterfly valve discs | DN10 – DN300 |
| Pump Components | Pump casings, impellers, wear rings, pump covers, stuffing boxes | Ø50 mm – Ø500 mm |
| Bushings & Bearings | Plain bushings, flanged bushings, thrust washers, sleeve bearings, propeller shaft bearings | Ø20 mm – Ø300 mm |
| Propeller Components | Small propeller blanks, propeller shaft sleeves, rope guards, shaft couplings | Ø50 mm – Ø400 mm |
| Pipe Fittings | Elbows, tees, reducers, unions, nipples, ferrules, compression fittings, hose barbs | ⅛” NPT – 4″ NPT |
| Fasteners & Threaded Parts | Bolts, nuts, studs, threaded rods, eye bolts, U-bolts, grub screws | M5 – M48 / #10–1¼” |
| Electrical & Instrumentation | Terminal connectors, cable glands (marine type), switch housings, instrument housings | PG7–PG63 / M12–M75 |
| Structural & Architectural | Hinges, handrails, brackets, cleats, stanchions, pad eyes, chainplates | Custom per drawing |
| Hydraulic Components | Hydraulic manifolds, cylinder ends, adapters, port bodies, pressure fittings | Up to 350 bar rated |
Size & Dimensional Capability Chart
Our Naval Brass casting and machining capabilities cover a wide dimensional range. The chart below shows our standard dimensional capabilities:
| Parameter | Sand Casting | Investment Casting | Centrifugal Casting | CNC Machined |
|---|---|---|---|---|
| Minimum Weight | 50 g | 10 g | 500 g | 1 g |
| Maximum Weight | 100 kg | 5 kg | 500 kg | Limited by raw bar/casting |
| Max. Linear Dimension | 1000 mm | 300 mm | Ø600 mm (OD) | 2000 mm (turning) |
| Min. Wall Thickness | 3 mm | 1.5 mm | 5 mm | 0.5 mm |
| As-Cast Tolerance | CT8–CT10 | CT5–CT7 | CT8–CT9 | ±0.005 mm (precision) |
| Surface Finish (As-Cast) | Ra 12–25 µm | Ra 1.6–3.2 µm | Ra 6–12 µm | Ra 0.4–3.2 µm |
| Hole Diameter (min) | 8 mm (cored) | 3 mm | 10 mm (cored) | 0.5 mm (drilled) |
| Thread Range | — | — | — | M2–M120 / #4–4″ UNC/UNF |
Standard Naval Brass Bushing Dimensional Range (as example):
| ID (mm) | OD (mm) | Length (mm) | Flange OD (mm) | Wall Thickness (mm) |
|---|---|---|---|---|
| 20 | 28 | 20–60 | 35 (optional) | 4 |
| 30 | 40 | 30–80 | 50 (optional) | 5 |
| 50 | 65 | 40–100 | 80 (optional) | 7.5 |
| 75 | 95 | 50–150 | 115 (optional) | 10 |
| 100 | 125 | 60–200 | 148 (optional) | 12.5 |
| 150 | 180 | 80–250 | 210 (optional) | 15 |
| 200 | 240 | 100–300 | 270 (optional) | 20 |
Custom sizes available as per drawing or specification. All dimensions in mm.
Tolerances, Standards & Certifications
Dimensional Tolerances:
- As-Cast (Sand Casting): ISO 8062-3 CT8–CT10; linear tolerance ±0.5–2.0 mm depending on dimension
- As-Cast (Investment Casting): ISO 8062-3 CT5–CT7; linear tolerance ±0.1–0.5 mm
- CNC Turned & Milled: Standard ±0.05 mm; Precision ±0.01 mm; High-Precision ±0.005 mm
- Threaded Parts: Class 2A/2B (UNC/UNF per ASME B1.1); 6g/6H (metric per ISO 965-1); Class A (BSP per BS EN ISO 228)
- Flatness / Straightness: ±0.02 mm per 100 mm (precision machined surfaces)
- Surface Finish: Ra 0.4–3.2 µm (machined); Ra 6.3–25 µm (as-cast)
Applicable International Standards:
| Category | Standard | Description |
|---|---|---|
| Material (US) | ASTM B21 | Naval Brass rod and bar |
| Material (US) | ASTM B171 | Naval Brass sheet and plate |
| Material (US) | ASTM B61 / B62 | Steam bronze / composition bronze castings |
| Material (EU) | EN 12165 / CW712R | CuZn38Sn1 wrought Copper-Zinc-Tin alloy |
| Material (UK) | BS 2874 CZ112 | Naval Brass rod and section |
| Material (DE) | DIN 17660 | CuZn38Sn1 rod and bar |
| Material (JP) | JIS C4641 | Naval Brass wire, rod, bar |
| Casting Tolerance | ISO 8062-3 | Dimensional tolerances for castings |
| Surface Texture | ISO 1302 / ASME B46.1 | Surface roughness designation |
| Thread (US) | ASME B1.1 / B1.20.1 | UNC/UNF / NPT pipe threads |
| Thread (ISO) | ISO 965-1 / ISO 7-1 | Metric threads / ISO pipe threads |
| Quality System | ISO 9001:2015 | Quality management system |
| Marine Classification | ABS / DNV-GL / Lloyd’s / BV | Available for classified marine castings (on request) |
| NDT / Inspection | ASTM E165 / ASTM E428 | Dye penetrant / Ultrasonic testing |
Surface Finish, Plating & Coating Options
Naval Brass naturally develops a protective patina in marine environments, but many applications require additional surface treatments for aesthetics, corrosion protection, or functional purposes. We offer the following finishing options:
| Finish / Coating | Standard | Thickness | Application |
|---|---|---|---|
| Natural (Degreased) | — | — | Standard for cast parts ready for installation |
| Bright Polished | Ra ≤0.4 µm | — | Decorative marine hardware, architectural |
| Satin / Brushed | Ra 0.8–1.6 µm | — | Architectural, marine fittings |
| Electro-Tinning | BS EN ISO 2093 | 5–25 µm | Electrical connectors, food-contact fittings |
| Nickel Plating | BS EN ISO 4527 / ASTM B689 | 5–25 µm | Corrosion resistance, decorative |
| Electroless Nickel | ASTM B733 | 10–50 µm | Uniform coating on complex shapes |
| Chrome Plating (Hard) | ASTM B177 | 5–250 µm | Wear resistance on bearing surfaces |
| Chrome Plating (Decorative) | ASTM B456 | 0.3–0.5 µm | Decorative architectural fittings |
| Silver Plating | ASTM B700 | 2–25 µm | Electrical contacts, high-end connectors |
| PTFE Coating | — | 15–25 µm | Low-friction valve components, threads |
| Epoxy / Powder Coat | — | 60–120 µm | External corrosion protection for submerged parts |
| Passivation / Chemical Polishing | — | — | Descaling after casting, pre-plating treatment |
Industries Using Naval Brass Castings & Machined Parts
Naval Brass’s outstanding combination of corrosion resistance, machinability, and mechanical strength makes it indispensable across many industries:
- Marine & Shipbuilding: Sea chests, through-hull fittings, seacocks, propeller shaft bushings, rudder pintles, anchor windlass components, bilge pump bodies — Naval Brass is the standard for Class-approved marine fittings meeting ABS, DNV, Lloyd’s Register, and Bureau Veritas requirements.
- US Navy & Defense: Sonar dome fittings, submarine cable connectors, naval torpedo components, shipboard hydraulic fittings — meeting MIL-B-16541 and NAVSEA requirements for Naval Brass dezincification resistance.
- Oil & Gas / Offshore: Subsea connectors, wellhead components, manifold fittings, offshore platform sea-water service valves, and instrumentation housings. Preferred over carbon steel for its resistance to hydrogen sulfide and chlorides.
- Desalination Plants: Tube sheet support plates, condenser end caps, heat exchanger tube plates, and water intake screens for SWRO (sea water reverse osmosis) desalination systems.
- Power Generation: Condenser water boxes, steam surface condenser fittings, cooling water inlet/outlet headers, turbine auxiliary seawater systems.
- Waterworks & Plumbing: Seawater service valves, pressure-reducing valves, flow meters, water meter bodies, fire hydrant components.
- Chemical & Petrochemical: Pump housings, valve bodies, impellers, and fittings for mildly corrosive chemical service in salt water environments.
- Aquaculture & Fish Processing: Anti-fouling properties of Naval Brass are exploited in fish cage frames, mesh supports, and seawater processing equipment.
- Architectural & Decorative Marine: Marine-grade hardware for luxury yachts and commercial vessels — cleats, chocks, fairleads, port lights, deck plates.
- Railway & Automotive: Bearing bushings, thrust washers, and wear-resistant inserts for rolling stock and industrial machinery.
Turnaround Time & Performance Metrics
| Order Type | Typical Lead Time | Notes |
|---|---|---|
| Sample / Prototype (1–5 pcs) | 2–3 weeks | Pattern/tooling made from scratch; investment casting faster |
| First Production Run (existing tooling) | 4–6 weeks | Standard lead time from PO receipt to shipment |
| Repeat Orders (existing pattern) | 3–4 weeks | Faster with existing pattern/tooling available |
| CNC Machined Only (from bar stock) | 1–3 weeks | Depends on complexity and quantity |
| Urgent / Expedited Orders | Subject to capacity | Surcharge may apply; please inquire |
Performance Metrics (Our Manufacturing Benchmarks):
| Metric | Our Performance |
|---|---|
| On-Time Delivery Rate | >95% of orders delivered within agreed lead time |
| Casting Yield (acceptance rate) | >92% first-pass acceptance |
| Dimensional Rejection Rate | <2% on CNC machined parts |
| Chemical Composition Accuracy | ±0.2% on alloying elements (Spectro OES verified) |
| Surface Roughness Consistency | Ra within ±10% of specified value |
| Customer Return Rate (quality) | <0.5% per annum |
| Repeat Customer Rate | >80% of annual revenue from repeat buyers |
Why Choose Cable Glands India for Naval Brass Castings?
With hundreds of suppliers available globally, here is what makes us the preferred Naval Brass casting and machining partner for discerning buyers in the USA, Europe, and worldwide:
- 3 Decades of Experience: Over 30 years in precision Copper alloy casting and machining — we know the nuances of Naval Brass behavior during solidification, machining, and in service. Our experience translates into fewer surprises and more reliable outcomes for your projects.
- True One-Stop-Shop: We handle everything under one roof — pattern making, casting, heat treatment, CNC machining, surface finishing, testing, and export packaging. This eliminates supply chain complexity and coordination delays.
- Faster Turnaround than Western Foundries: Our typical 4–6 week lead time for production orders is significantly faster than comparable European or US foundries (which often quote 10–16 weeks), while maintaining equivalent quality at 30–50% lower cost.
- Superior Communication & Global Exposure: Our team speaks fluent English, is familiar with Western business practices and engineering standards (ASTM, ASME, BS, DIN, JIS), and responds within 24 hours. We understand RFQs, DFM feedback, PPAP requirements, and documentation expectations of US and European buyers.
- Full Customization & Flexibility: We work from your drawings (2D DXF/DWG or 3D STEP/IGES), samples, or verbal descriptions. We offer DFM (Design for Manufacturability) review at no extra charge to help optimize your casting design for cost and quality.
- Transparent Quality Documentation: Every shipment comes with a full quality pack: Material Test Report (MTR/CoC), dimensional inspection report, heat number traceability, packing list, commercial invoice, and Certificate of Origin — exactly what US importers and quality departments require.
- Flexible MOQ & Small-Batch Capability: We accept orders from 10 pieces to 50,000 pieces. Our flexible scheduling means small and medium enterprises get the same attention as large corporations.
- Custom Packaging with Your Branding: We offer custom packaging with your company label, logo, and part number marking. Parts can be individually tagged, bubble-wrapped, rust-inhibitor treated, and packed in wooden cases or export cartons as required.
- Competitive Pricing from India: India’s mature manufacturing ecosystem, lower labor costs, and established Copper alloy supply chain allows us to offer Western-quality Naval Brass castings at Indian prices — typically 30–50% below equivalent US or European suppliers.
- Proven Export Track Record: We have shipped Naval Brass castings and machined parts to the USA (including Texas, Florida, California, Louisiana, Ohio), UK, Germany, Netherlands, Australia, UAE, and Singapore. We handle all export logistics, insurance, and customs documentation.
Packaging, Export & Shipping
We take packaging seriously — poor packaging is a leading cause of transit damage and customer complaints. All Naval Brass castings and machined parts are packed for international export following best practices:
- Individual Part Protection: Each part wrapped in corrosion-inhibitor (VCI) film or bubble wrap, with foam padding for machined surfaces
- Inner Boxes: Parts grouped in strong corrugated cardboard boxes with foam inserts or packing peanuts
- Outer Export Case: Heavy items (over 5 kg each or over 50 kg total) packed in wooden export crates, fumigation-free (HT-marked) for USA, Australia, and EU compliance
- Custom Labeling: Each box/case labeled with your company name, logo, part number, revision level, quantity, heat number, and country of origin — completely white-labeled if required
- Rust Prevention: Machined surfaces coated with Rust Guard or Cosmoline for long-term protection during ocean freight
Shipping Options to USA:
| Mode | Transit Time | Best For | Incoterms |
|---|---|---|---|
| Air Freight | 5–7 business days | Urgent orders, prototypes, <100 kg | EXW, FOB, CIF, DDP |
| Express Courier (DHL/FedEx) | 3–5 business days | Small parcels, samples, <30 kg | DDP (delivered to your door) |
| Sea Freight (LCL) | 25–30 days | 100 kg – 5,000 kg | FOB Mumbai / CIF US Port |
| Sea Freight (FCL) | 22–28 days | Large volume orders, full container | FOB / CFR / CIF |
Export Documentation provided: Commercial Invoice, Packing List, Certificate of Origin (COO – Form A or non-preferential), Bill of Lading / Airway Bill, Material Test Report, Inspection Certificate, HS Code classification (HS 7419.99 / 7419.10 for brass castings), and MSDS if required.
Payment Terms: T/T (Wire Transfer) 30% advance + 70% against B/L copy; PayPal / Wise for small orders; LC at sight for large orders.
Frequently Asked Questions – Naval Brass Castings
Q1. What exactly is Naval Brass, and how is it different from regular Brass?
Naval Brass (UNS C46400 / CuZn38Sn1) is a Copper-Zinc alloy with approximately 60% Copper, 39% Zinc, and 1% Tin. The addition of Tin makes it significantly more resistant to dezincification (a form of corrosion where Zinc leaches out, leaving a porous Copper sponge). Regular yellow Brass (CuZn37/C27000) lacks this Tin addition and is therefore unsuitable for marine, seawater, or industrial water applications. Naval Brass is also harder, stronger, and more durable than standard Brass grades.
Q2. What is the difference between Naval Brass casting (C46400) and common Brass Casting?
Naval Brass castings are made from the Naval Brass alloy (C46400 / CuZn38Sn1) and are used where seawater or corrosive environments are present. Common Brass castings (typically CuZn5Pb3 / leaded Brass / C83600) are used for general plumbing, electrical, and industrial applications. Naval Brass castings are harder to cast than standard Brass due to higher Zinc content but offer far superior corrosion resistance.
Q3. Do you supply Naval Brass castings conforming to US Navy / NAVSEA specifications?
Yes. We supply Naval Brass castings conforming to MIL-B-16541 (Naval Brass rod) and can produce marine hardware meeting ABS, DNV-GL, Lloyd’s Register, and Bureau Veritas requirements. Please share your specification requirements with your inquiry for us to confirm compliance.
Q4. Can you machine Naval Brass castings to tight tolerances (±0.01 mm)?
Absolutely. Our CNC machining division machines Naval Brass castings to ±0.01 mm standard tolerance and ±0.005 mm for precision applications. Naval Brass has a machinability rating of approximately 30–40% (relative to free-machining Brass CDA 360 = 100%), which requires appropriate cutting speeds and tooling. Our machinists are experienced with Copper alloys and produce consistent, burr-free results.
Q5. What is the minimum order quantity (MOQ) for Naval Brass castings?
We have no strict MOQ. We accept orders from as low as 10 pieces for prototypes or samples, and can scale up to 50,000+ pieces per run for high-volume production. Pricing is naturally better at higher quantities due to pattern amortization and setup cost sharing.
Q6. Do you provide material test reports (MTR) with your Naval Brass castings?
Yes, every shipment is accompanied by a full Material Test Report (MTR) confirming chemical composition (verified by Spectro OES), mechanical properties (UTS, elongation, hardness), heat/batch number, applicable standard conformance, and our quality signature. Radiographic test reports, dye penetrant test reports, and dimensional inspection reports are also available on request.
Q7. Can you reverse-engineer an existing Naval Brass casting from a sample?
Yes. We regularly reverse-engineer existing castings from physical samples using dimensional measurement (CMM or manual measurement), 3D scanning, and material analysis. Once we confirm the dimensions and alloy composition, we produce the pattern and start casting. This service is widely used for spare parts, OEM replacement parts, and obsolete casting recovery.
Q8. What casting process is best for my Naval Brass part?
It depends on the part size, complexity, quantity, and tolerance requirements. Sand casting is best for large, heavy parts (over 2 kg) or low-volume orders. Investment casting is ideal for intricate, small parts (under 3 kg) needing tight as-cast tolerances. Centrifugal casting is best for cylindrical parts like bushings, sleeves, and tube blanks. We are happy to advise on the most cost-effective process for your specific part — just share your drawing or sample.
Q9. How do I prevent dezincification in my brass fittings in seawater service?
The best solution is to specify Naval Brass (C46400 / CuZn38Sn1) instead of standard Brass. The 1% Tin addition inhibits dezincification. Additionally, inhibited Brass alloys containing Arsenic (C46500 / CuZn38Sn1As) provide even better dezincification resistance. Avoid using standard yellow Brass (CuZn37) or leaded Brass (C83600) in seawater or potable water applications where dezincification is a concern.
Q10. What is the lead time for Naval Brass castings from India to the USA?
Typical production lead time is 4–6 weeks from purchase order receipt. Add 5–7 days for air freight, or 25–30 days for sea freight to US ports (Los Angeles, Houston, New York, Chicago). For urgent orders, we can sometimes expedite production to 2–3 weeks; please inquire at the time of ordering.
Q11. Can you supply Naval Brass castings with third-party inspection (TPI)?
Yes. We welcome third-party inspection by agencies such as SGS, Bureau Veritas, Intertek, TÜV, and others. We are accustomed to working with TPI requirements from US defense, oil & gas, and marine classification society buyers. Please advise your inspection requirement at the time of ordering so we can schedule accordingly.
Q12. What is the difference between Tobin Bronze, Naval Brass, and Admiralty Brass?
Naval Brass (C46400/CuZn38Sn1) and Tobin Bronze are essentially the same alloy — both are ~60% Cu, ~39% Zn, ~1% Sn — “Tobin Bronze” is an older trade name. Admiralty Brass (C44300/CuZn29As1) has more Copper (~70% Cu, ~29% Zn), plus Arsenic as the dezincification inhibitor, and is used primarily for condenser and heat exchanger tubing where its higher Copper content provides better thermal conductivity.
Q13. Do you offer custom alloy compositions for special Naval Brass requirements?
Yes. We can formulate custom Copper-Zinc-Tin alloys to your specification, including modified Naval Brass with Arsenic additions (for enhanced dezincification resistance), Nickel additions (for strength), or other trace elements. Please provide your specification or target property requirements and our metallurgist will advise on feasibility.
Q14. Can you supply Naval Brass castings for potable water applications in the USA (NSF-61)?
Naval Brass C46400 has relatively low lead content (Pb ≤0.20%) and can generally be used in potable water systems. However, NSF/ANSI 61 certification (lead-free requirement, Pb ≤0.25% extractable) for US potable water applications requires specific testing of the finished product. We can supply material conforming to the composition limits; formal NSF-61 certification of finished products is the buyer’s responsibility. We can supply a low-lead variant (Pb ≤0.05%) if required.
Q15. What quality control steps do you perform on Naval Brass castings?
Our quality control covers: (1) Incoming raw material verification by Spectro OES; (2) Melt chemistry check before pouring; (3) Visual inspection of castings post-shakeout; (4) Dimensional inspection (CMM or manual) against drawing; (5) Hardness testing (Brinell/Rockwell); (6) Surface finish measurement; (7) Pressure testing (hydrostatic) for pressure-holding components; (8) Dye Penetrant Testing (DPT) for critical parts; (9) Final visual and packaging inspection before shipment. An Inspection Release Note accompanies each shipment.
Naval Brass Parts
Naval Brass parts cover a broad spectrum of precision-engineered components used wherever seawater corrosion resistance, strength, and reliable performance are non-negotiable. The alloy — UNS C46400 / CuZn38Sn1 — owes its suitability to the ~1% Tin addition that suppresses dezincification, the dominant failure mode of standard Brass in saline or chloride-rich environments. Our facility manufactures Naval Brass parts ranging from simple turned bushings and threaded nipples to complex multi-cavity valve bodies and pump casings, all produced from verified C46400 bar stock or in-house cast billets.
Common Naval Brass parts we supply include shaft sleeves and propeller shaft bearings, seacock bodies, sea strainer housings, through-hull fittings, valve stems and discs, compression ferrules and olive rings, hydraulic adapters and manifold bodies, instrument connection bodies, cable gland bodies for marine enclosures, and structural cleats and deck hardware. Each part is dimensionally inspected against customer drawings or applicable standards (ASME B16.11, BS EN 12165, ASTM B21) before dispatch.
For the US market, we produce Naval Brass parts with UNC / UNF / NPT threads as standard, supply material certifications per ASTM B21, and can provide low-lead material (Pb ≤ 0.05 %) for applications where NSF/ANSI 61 compliance is a buyer requirement. Marking, tagging, and custom packaging with customer part numbers are available on all orders.
| Part Name | Alloy | Standard / Spec | Typical Size Range | Process |
|---|---|---|---|---|
| Shaft Sleeve / Bearing Bush | C46400 / CuZn38Sn1 | ASTM B21 / BS CZ112 | Ø20 – Ø300 mm | Centrifugal cast + CNC |
| Propeller Shaft Bush | C46400 | Lloyd’s / ABS | Ø50 – Ø250 mm | Centrifugal cast + CNC |
| Seacock / Through-Hull Body | C46400 / C83600 | BS EN ISO 228 / NPT | DN15 – DN100 | Sand cast + CNC |
| Valve Stem | C46400 | ASME B16.34 | Ø10 – Ø50 mm | CNC turned |
| Compression Ferrule / Olive | C46400 | DIN 3861 / BS 864 | Ø6 – Ø54 mm (tube OD) | CNC turned |
| Hydraulic Adapter | C46400 | ASME B1.20.1 / ISO 228 | ⅛” – 2″ NPT/BSP | CNC machined |
| Cable Gland Body (Marine) | C46400 / C46200 | IP68 marine type | PG13 – PG63 | CNC turned |
| Deck Cleat / Pad Eye | C46400 | Custom drawing | 50 – 300 mm | Sand cast + CNC |
Naval Brass Sand Casting
Naval Brass sand casting is the most versatile and cost-effective route for producing medium-to-large C46400 components in low-to-medium volumes. Our green sand and no-bake (furan resin) foundry processes are optimised specifically for Naval Brass — an alloy that, due to its elevated Zinc content, requires careful gating, risering, and temperature control to prevent porosity, hot tearing, and Zinc oxide inclusions. We routinely pour Naval Brass sand castings from 200 g up to 80 kg in a single piece.
The sand casting process begins with pattern manufacture — either wooden patterns for prototypes and small runs, or aluminium / epoxy resin patterns for longer-run production. Cores are produced using cold-box or shell-core processes for internal passages. Melt chemistry is verified by Spectro OES before and after pouring; every heat is logged and traceable to the finished casting. Post-casting operations include fettling, shot blasting, and dimensional checking against the casting drawing before any CNC finish machining.
Why choose sand casting for Naval Brass? Sand casting allows complex external geometries, cored internal passages, and flanged configurations that are impractical from bar stock. It is especially well-suited to valve bodies, pump casings, sea chest covers, manifold bodies, and large flanges where bar stock would be prohibitively expensive or simply unavailable in the required size. Wall thicknesses as low as 3 mm are achievable in Naval Brass sand castings with proper tooling.
| Parameter | Green Sand | No-Bake / Furan Resin |
|---|---|---|
| Weight Range | 200 g – 40 kg | 1 kg – 80 kg |
| Casting Tolerance (ISO 8062-3) | CT8 – CT10 | CT7 – CT9 |
| Min. Wall Thickness | 3.5 mm | 3.0 mm |
| Surface Finish (As-Cast) | Ra 12 – 25 µm | Ra 6 – 12 µm |
| Core Complexity | Simple cores | Complex, high-accuracy cores |
| Typical Lead Time (production run) | 4 – 6 weeks | 4 – 6 weeks |
| Pattern Material | Wood / Aluminium | Aluminium / Resin |
| Best For | Flanges, covers, simple housings | Valve bodies, pump casings, complex passages |
Quality checks on Naval Brass sand castings: Visual inspection → dimensional check (CMM or manual) → Spectro OES chemistry verification → Brinell hardness test → Dye Penetrant Test (DPT) for pressure-critical castings → hydrostatic pressure test (on request) → final visual and packaging inspection. Full MTR and CoC supplied with every shipment.
Applicable standards for Naval Brass sand castings: ASTM B62, ASTM B584, BS EN 1982, IS 318, ISO 1338. Castings for marine classification society approval (ABS, DNV-GL, Lloyd’s Register, Bureau Veritas) are available on request with witness testing.
Naval Brass Fittings
Naval Brass fittings are pipe, tube, and hose connection components manufactured from C46400 / CuZn38Sn1 alloy for service in seawater, brackish water, marine fuel systems, and other corrosive fluid applications. Unlike standard Brass fittings — which are susceptible to dezincification in chloride-rich water, leading to premature failure — Naval Brass fittings maintain their structural integrity and leak-free performance in long-term marine service. We manufacture and export Naval Brass fittings to buyers in the USA (meeting ASME / ANSI / NPT standards), UK (BSP), Europe (metric DIN/ISO), and Australia.
Our range of Naval Brass fittings includes male and female threaded couplings (NPT, NPTF, BSP, BSPT, metric), elbows (45° and 90°), equal and reducing tees, reducing bushes, hex nipples, barrel nipples, pipe caps, hose barbs, push-in fittings, compression-type tube fittings (DIN 3861 / Parker / Swagelok equivalent dimensions), flare fittings (SAE 45°), JIC fittings (37°), and custom-configured manifold fittings. All threaded fittings are gauged with calibrated thread gauges (GO/NO-GO) conforming to ASME B1.20.1 for NPT and ISO 228 for BSP before despatch.
For the US marine market, our most in-demand Naval Brass fittings are NPT-threaded male connectors and elbows for seacock-to-hose connections, through-hull to seacock adapters, raw-water strainer inlet fittings, engine raw-water inlet and exhaust fittings, and sanitation (head) system sea connections. These replace the commonly used (but corrosion-prone) standard Brass or Bronze fittings in older vessels being re-fitted or repaired.
| Fitting Type | Thread Standard | Size Range | Standard / Spec |
|---|---|---|---|
| Male / Female Coupling (Hex) | NPT / BSPT / Metric | ⅛” – 4″ (NPT); DN6–DN100 (metric) | ASME B16.11 / BS EN 10226 |
| 90° Elbow (M×F / M×M / F×F) | NPT / BSP | ⅛” – 2″ | ASME B16.11 |
| 45° Street Elbow | NPT | ⅛” – 1½” | ASME B16.11 |
| Equal Tee / Reducing Tee | NPT / BSP | ⅛” – 2″ | ASME B16.11 |
| Hex Nipple (close / long) | NPT / BSP | ⅛” – 2″ | ASME B16.11 |
| Reducing Bush | NPT / BSP | ¼” × ⅛” – 2″ × 1¼” | ASME B16.11 |
| Hose Barb Fitting | NPT (male) / BSP | ⅛” – 1″ NPT × Ø6–25 mm hose | SAE J514 |
| Compression Sleeve / Ferrule | — | Ø6 – Ø54 mm (tube OD) | DIN 3861 / ISO 8434 |
| Flare Fitting (45° SAE) | SAE 45° flare | Ø6 – Ø25 mm | SAE J512 |
| JIC Fitting (37°) | JIC 37° flare (UNF) | Ø6 – Ø25 mm | SAE J514 |
| Through-Hull Fitting (Flanged) | NPT / BSP inlet | DN15 – DN80 | ABYC / ISO 9093 |
| Pipe Cap | NPT / BSP | ⅛” – 2″ | ASME B16.11 |
Material certification: All Naval Brass fittings supplied with a material test report confirming composition per ASTM B21 (C46400). Pressure ratings for screwed fittings follow ASME B16.11 Class 2000/3000/6000 as applicable. Custom pressure ratings and wall thicknesses available on request.
Naval Brass Parts Manufacturers in India
India has a well-established Copper alloy casting and machining industry, particularly in industrial clusters in Gujarat (Jamnagar, Rajkot), Maharashtra (Mumbai, Pune), Tamil Nadu (Coimbatore), and Uttar Pradesh (Moradabad). Among the recognised Naval Brass parts manufacturers in India, we — Cable Glands India — stand out for our focused expertise in Copper-family alloys (Brass, Bronze, Naval Brass, Phosphor Bronze, Aluminium Bronze), our integrated casting-plus-machining capability, and our 30-year track record of supplying precision components to global buyers in the USA, UK, Europe, the Middle East, and Southeast Asia.
What distinguishes a serious Naval Brass parts manufacturer from a general Brass jobber? Naval Brass (C46400) is not simply “Brass with Tin added” — it requires specific melting practice (Zinc recovery control, degassing, flux treatment), correct risering to manage solidification shrinkage, and experienced machining to avoid work-hardening and built-up edge on cutting tools. Manufacturers who produce standard leaded Brass parts (CuZn39Pb3 / C38500) routinely do not have the process knowledge to consistently produce sound, low-porosity Naval Brass castings. We have invested in the dedicated processes, alloy knowledge, and testing equipment to manufacture Naval Brass reliably and repeatably.
Our credentials as a Naval Brass parts manufacturer in India:
- 30+ years of Copper alloy manufacturing experience, with Naval Brass being a core product line
- ISO 9001:2015 certified quality management system covering the full production chain from raw material to despatch
- In-house Spectro OES for alloy chemistry verification — every melt is checked; no assumptions
- CMM dimensional inspection for close-tolerance machined Naval Brass parts
- Export-ready documentation: ASTM-conforming MTRs, CoC, packing lists, COO, and HS code classification for seamless import into the USA and other markets
- Pattern and tooling library: existing patterns for many standard Naval Brass casting configurations (valve bodies, bushings, through-hull fittings, flanges) reduce tooling cost and lead time for repeat buyers
- Flexible capacity: able to handle prototype quantities (10 pieces) through to production volumes (10,000+ pieces per run)
- Direct manufacturer pricing: no trading-house mark-up; you deal directly with the factory
How to evaluate a Naval Brass parts manufacturer in India before placing an order:
| Evaluation Criterion | What to Ask / Check | Our Answer |
|---|---|---|
| Alloy expertise | Do they cast Naval Brass specifically, or only standard Brass? | Naval Brass (C46400) is a core alloy for us |
| Chemistry verification | Do they have in-house OES / spectrometer? | Yes — Spectro OES, every melt certified |
| Quality certification | ISO 9001:2015 or equivalent? | Yes — ISO 9001:2015 certified |
| Casting process range | Sand, investment, centrifugal available? | All three, plus CNC machining |
| Export experience | Have they exported to USA / Europe before? | Yes — 30+ years, multiple continents |
| Lead time commitment | Can they commit to 4–6 weeks production lead time? | Yes — standard lead time |
| Documentation | ASTM MTR, CoC, COO, CMM report available? | Yes — full quality pack with every shipment |
| MOQ flexibility | Will they accept 25–100 piece orders? | Yes — no rigid MOQ, from 10 pieces |
| Communication | English fluency, 24-hour response? | Yes — dedicated export team |
We welcome factory audits, video calls, and sample orders as part of your supplier qualification process. Contact us at sales@cableglandsindia.com to initiate a discussion or request a quotation for your Naval Brass parts requirement.
Request a Quote for Naval Brass Castings & Machined Parts
Ready to source precision Naval Brass castings or CNC machined Naval Brass parts from India? Contact us with your drawing, sample, or specification. We will respond with a detailed quotation within 24–48 business hours.
Email: sales@cableglandsindia.com
Phone / WhatsApp: +91 22 4344 9300
What to include in your inquiry: Drawing (PDF, DXF, STEP), required quantity, material grade, tolerances, surface finish, delivery address, and any special requirements.