Silicon Brass Silicon Bronze Casting – ASTM C87300, C87500, C87600
Cable Glands India manufactures silicon brass and silicon bronze castings to ASTM C87300, C87500, and C87600 compositions, supplying valve stems, marine hardware, gears, electrical fittings, and pump components where a combination of strength, corrosion resistance, and good castability is required. Silicon brass and silicon bronze are copper-zinc-silicon casting alloys that offer higher strength than standard yellow brass along with good weldability and resistance to dezincification and stress corrosion cracking. Valve manufacturers, marine hardware suppliers, pump OEMs, and electrical fitting producers source silicon brass and silicon bronze castings from Cable Glands India because our foundry controls melt chemistry and casting process across all three grades to match the property requirements of each application.
Price: US$ 15.90 per kilogram | Custom pricing available for bulk and OEM orders
Product Overview
What Silicon Brass / Silicon Bronze Is
Silicon brass and silicon bronze castings covered by ASTM C87300, C87500, and C87600 are copper-zinc alloys with a silicon addition that improves strength, castability, and resistance to dezincification compared with standard leaded brass. C87500 is the most commonly specified general purpose grade, while C87300 and C87600 offer adjusted composition windows for specific strength and corrosion requirements.
Silicon Brass Sand Casting
Sand casting is used for larger silicon brass and silicon bronze components such as valve bodies, pump housings, and marine fittings in low to medium production volumes, with gating and risering controlled to manage the alloy shrinkage characteristics during solidification.
Silicon Brass Investment Casting
Investment casting is offered for smaller, intricate silicon brass and silicon bronze components such as valve stems, gears, and fitting inserts where close as-cast tolerance reduces machining allowance and preserves fine surface detail.
Silicon Brass Green Sand Casting
Green sand casting supports medium volume silicon brass and silicon bronze components where reusable pattern equipment provides competitive per-piece pricing for recurring valve and fitting production programs.
Silicon Brass Centrifugal Casting
Centrifugal casting produces cylindrical silicon brass and silicon bronze blanks such as bushings and valve stem preforms with directional solidification that improves density for components subject to wear or pressure.
Silicon Brass Permanent Mold Casting
Permanent mold casting is applied to higher volume silicon brass and silicon bronze components where a reusable metal mould improves dimensional repeatability and surface finish for recurring fitting and connector production runs.
Silicon Brass Resin Sand Shell Molding / Casting
Resin sand shell moulding is used for silicon brass and silicon bronze components requiring improved surface finish and dimensional accuracy over conventional sand casting, reducing machining stock on valve and gear blanks.
Typical Products Cast in Silicon Brass / Silicon Bronze
Cable Glands India casts silicon brass and silicon bronze into valve stems and valve bodies, marine hardware and boat fittings, gears and worm wheels, electrical fitting bodies, pump components, architectural hardware, and general corrosion-resistant industrial fittings machined to customer drawings from the as-cast blank.
Key Features
- Silicon brass and silicon bronze compositions per ASTM C87300, C87500, and C87600
- Sand casting, investment casting, green sand casting, centrifugal casting, permanent mold casting, and resin sand shell casting available
- Higher strength than standard leaded yellow brass
- Good resistance to dezincification and stress corrosion cracking
- Good weldability for fabricated assemblies
- Custom pattern and tooling development in-house
- CNC machining available on the same castings for finished components
- Batch-wise chemical composition and mechanical test certificates
Grade Selection Across C87300, C87500, and C87600
Cable Glands India can recommend the appropriate grade among C87300, C87500, and C87600 based on required strength, corrosion resistance, and casting process, since each grade offers a slightly different balance of these properties within the silicon brass and silicon bronze family.
Corrosion and Dezincification Resistance
The silicon addition in these alloys improves resistance to dezincification and stress corrosion cracking compared with standard leaded brass, supporting their use in marine hardware and valve components exposed to aggressive water and atmospheric conditions.
Strength and Weldability
Silicon brass and silicon bronze castings offer higher mechanical strength than standard yellow brass while retaining good weldability, allowing cast components to be joined into fabricated assemblies where required.
Machinability for Valve and Fitting Components
These alloys machine well for turning, threading, and boring operations used to finish valve stems, fitting bodies, and gear teeth directly from the as-cast blank.
Casting Process Selection by Component
Cable Glands India selects sand casting, investment casting, green sand casting, centrifugal casting, permanent mold casting, or resin sand shell casting for each silicon brass or silicon bronze order based on component geometry, wall thickness, production volume, and target unit cost.
Technical Specifications
| Parameter | Typical Range / Value |
|---|---|
| Alloy designation | ASTM C87300, C87500, C87600 |
| Tensile strength | 350 to 480 MPa (grade dependent) |
| Elongation | 15 percent to 25 percent |
| Hardness | 85 to 130 HB |
| Density | Approximately 8.5 g/cm3 |
| Casting methods | Sand, investment, green sand, centrifugal, permanent mold, resin sand shell |
| Typical casting weight range | 0.05 kg to 80 kg (larger on request) |
Raw Material Grades
| Grade | Alloy Type | Notes |
|---|---|---|
| C87300 | Silicon brass | General purpose, lower silicon content |
| C87500 | Silicon brass | Most commonly specified grade |
| C87600 | Silicon brass | Adjusted composition for specific strength needs |
| C87800 | Silicon bronze | Higher silicon variant reference |
International Equivalent Standards
| Country / Standard Body | Equivalent Reference |
|---|---|
| USA – ASTM / UNS | ASTM B584 C87300, C87500, C87600 |
| UK / Europe – EN | EN 1982 CuZn16Si4-C (reference) |
| Germany – DIN | DIN 1705 silicon brass reference |
| India – IS | IS 305 silicon brass ingots and castings (reference) |
| Japan – JIS | JIS H5120 silicon brass reference |
Product Types and Variants
| Casting Type | Description | Typical Use |
|---|---|---|
| Sand cast blanks | Larger components, low to medium volume | Valve bodies, pump housings |
| Investment cast blanks | Close tolerance, intricate geometry | Valve stems, gears |
| Green sand cast blanks | Medium volume, reusable pattern | Marine fittings |
| Centrifugal cast bushings | Directionally solidified cylindrical blank | Bushings, stem preforms |
| Permanent mold cast blanks | Higher volume, repeatable dimensions | Fittings, connectors |
| Resin sand shell cast blanks | Improved surface finish and accuracy | Valve and gear blanks |
| Finished machined components | Fully machined from cast blank | Ready-to-install valves and fittings |
Applications in Industry
Valves and Valve Stems
Valve bodies and valve stems are cast in silicon brass and silicon bronze for their combination of strength, machinability, and corrosion resistance in water and process fluid service.
Marine and Boat Hardware
Marine hardware and boat fittings use silicon brass and silicon bronze for reliable long-term performance in saltwater and marine atmosphere exposure.
Gears and Mechanical Components
Gears, worm wheels, and mechanical fittings are cast in silicon brass and silicon bronze where strength and wear resistance are required together with good machinability.
Electrical Fittings and Architectural Hardware
Electrical fitting bodies and architectural hardware components use silicon brass and silicon bronze for corrosion resistance combined with an attractive finish and good castability.
Manufacturing Process
Production begins with melt preparation in induction furnaces, where copper, zinc, and silicon are charged and alloyed to the specified C87300, C87500, or C87600 composition, verified by spectrometer analysis before pouring. Depending on component size, tolerance, and volume, castings are produced by sand casting, investment casting, green sand casting, centrifugal casting, permanent mold casting, or resin sand shell casting, then fettled to remove gates, risers, and flash. Components are visually inspected before proceeding to CNC machining, where valve stems, threads, gear teeth, and sealing faces are finished to drawing tolerance. Finished components are cleaned, dimensionally inspected, and packed for dispatch with accompanying material and test certification.
Quality Standards and Certifications
| Standard / Certification | Scope |
|---|---|
| ISO 9001 | Quality management system certification |
| ASTM B584 | Reference specification for copper alloy sand castings including C87300, C87500, C87600 |
| EN 1982 | Reference specification for copper alloy ingots and castings |
| RoHS | Restriction of hazardous substances compliance on request |
Why Choose Cable Glands India
- In-house melting, casting, and CNC machining for full process control
- Spectrometer verified alloy composition across C87300, C87500, and C87600 grades
- Sand, investment, green sand, centrifugal, permanent mold, and resin sand shell casting under one roof
- In-house pattern and tooling development for new component designs
- Material and mechanical property certification on request
- Competitive per-kilogram pricing with volume and OEM discounts
Frequently Asked Questions
Q1: What is silicon brass or silicon bronze casting?
Silicon brass and silicon bronze castings covered by ASTM C87300, C87500, and C87600 are copper-zinc alloys with a silicon addition that improves strength, castability, and resistance to dezincification compared with standard leaded brass.
Q2: What is the difference between C87300, C87500, and C87600?
The three grades have adjusted composition windows within the silicon brass family, giving slightly different balances of strength and corrosion resistance, and our team can recommend the appropriate grade for your application.
Q3: What casting methods do you offer for silicon brass and silicon bronze?
We offer sand casting, investment casting, green sand casting, centrifugal casting, permanent mold casting, and resin sand shell casting, selected according to component size, tolerance, and order volume.
Q4: Is silicon brass suitable for marine applications?
Yes, silicon brass and silicon bronze are widely used for marine hardware and boat fittings due to their corrosion resistance in saltwater and marine atmosphere exposure.
Q5: Can silicon brass castings be welded?
Yes, silicon brass and silicon bronze offer good weldability, allowing cast components to be joined into fabricated assemblies where required.
Q6: What casting weight range can you produce?
Standard capability covers castings from approximately 0.05 kg up to 80 kg, with larger components available on request.
Q7: Can you supply finished machined components, not just raw castings?
Yes, our foundry and CNC machining operations work together to supply fully finished, ready-to-install valve, gear, and fitting components from the same silicon brass or silicon bronze casting.
Q8: What is the price of silicon brass / silicon bronze casting?
Indicative pricing is US$ 15.90 per kilogram, with final pricing depending on component geometry, grade selection, casting process, machining requirements, and order quantity.
Q9: Do you export silicon brass and silicon bronze castings internationally?
Yes, Cable Glands India exports silicon brass and silicon bronze castings and machined components worldwide, with documentation support for customs and OEM approval processes.
International Equivalent Terms
| Language | Equivalent Terms |
|---|---|
| Spanish | Fundicion de laton de silicio, Bronce de silicio fundido |
| Russian | Lite iz kremnistoy latuni, Kremnistaya bronza litaya |
| French | Fonte de laiton au silicium, Bronze au silicium coule |
| Portuguese | Fundicao de latao de silicio, Bronze de silicio fundido |
| Italian | Fusione di ottone al silicio, Bronzo al silicio fuso |
Linked Parts and Related Terms
Silicon Brass Casting, Silicon Bronze Casting, C87300 Casting, C87500 Casting, C87600 Casting, Valve Stem Casting, Marine Hardware Casting, Sand Casting, Investment Casting, Centrifugal Casting.
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Get a Quote – Silicon Brass / Silicon Bronze Casting
Ready to source silicon brass or silicon bronze castings in C87300, C87500, or C87600 for valves, marine hardware, gears, or custom fittings? Our foundry team can recommend the correct grade and casting process for your application.
Price: US$ 15.90 per kilogram | Custom pricing available for bulk and OEM orders
Email: sales@cableglandsindia.com
Phone / WhatsApp: +91-22-43449300
Website: www.cableglandsindia.com
Share your drawing, required quantities, and preferred delivery timeline, and we will respond with a detailed quotation within one business day.