LG2 Bronze / LG2 Gunmetal Casting – High Quality Leaded Bronze Castings from India
LG2 Bronze (also known as LG2 Gunmetal) is one of the most widely used Leaded Bronze casting alloys for pressure-tight components, valves, pump bodies, and Pipe fittings. We are one of the leading manufacturers and exporters of LG2 Bronze Castings from India. We have been supplying LG2 Gunmetal components to the world market for many decades. With over three decades of experience in Bronze casting and precision machining, we manufacture high-integrity LG2 Bronze sand castings for global OEMs across USA, UK, Europe, Middle East, and Australia. Our integrated foundry and CNC machining facility ensures dimensional accuracy, pressure integrity, and repeatable metallurgical quality. LG2 Bronze is known for excellent machinability, good corrosion resistance in fresh and salt water, and outstanding pressure tightness. We specialize in customized LG2 Bronze Pipe fittings, valve bodies, marine hardware, pump components, and industrial castings as per BS, ASTM, DIN, IS, and JIS standards. Turnaround time: 4–6 weeks depending on tooling and batch size.
LG2 Bronze
LG2 Bronze is a Leaded Tin Bronze casting alloy traditionally specified under BS 1400: LG2 and widely used in pressure-containing cast components. The alloy contains Copper as the base metal with controlled additions of Tin, Zinc, and Lead to improve castability and machinability. LG2 Bronze exhibits excellent fluidity during sand casting, making it ideal for intricate shapes and complex internal passages. The presence of Lead enhances chip formation during machining, reducing tool wear and improving surface finish. LG2 Bronze offers good resistance to dezincification compared to ordinary Brass alloys and performs reliably in water, oil, and mild corrosive environments. It is extensively used in waterworks, plumbing, pump, and valve industries. Its balance between strength, machinability, and corrosion resistance makes it a cost-effective alternative to higher Tin Bronzes. LG2 Bronze castings are typically supplied in as-cast, shot-blasted, or fully machined condition.
LG2 Gunmetal
LG2 Gunmetal is the commercial term often used interchangeably with LG2 Bronze under British standards. Historically, Gunmetal referred to Tin Bronze alloys used in high-pressure and marine environments. LG2 Gunmetal combines strength and ductility with excellent pressure tightness, making it ideal for valve bodies, pump casings, and Pipe fittings. The alloy demonstrates good bearing properties and moderate wear resistance. LG2 Gunmetal is compatible with potable water systems and is widely used in marine and offshore hardware due to its resistance to corrosion and biofouling. It also offers excellent soldering and brazing characteristics. Under correct casting practices, LG2 Gunmetal delivers minimal porosity and strong metallurgical integrity. Our LG2 Gunmetal castings undergo spectrometer-based chemical verification and mechanical testing to ensure compliance with BS, IS, and international equivalents.
LG2 Bronze Casting
LG2 Bronze Casting is primarily produced through Sand Casting, though shell moulding and gravity casting may also be used for specific geometries. The process begins with pattern development followed by mould preparation using high-grade silica sand and binders. Molten LG2 Bronze is poured at controlled temperatures to ensure optimal grain structure and minimize shrinkage defects. Riser and gating design is engineered using simulation tools to enhance yield and reduce porosity. After solidification, castings undergo fettling, shot blasting, dimensional inspection, and hydrostatic pressure testing where applicable. Precision CNC machining ensures final tolerances up to ±0.05 mm depending on geometry. Our LG2 Bronze casting foundry is equipped with induction furnaces, sand mixers, moulding lines, and metallurgical testing labs to guarantee repeatable quality.
LG2 Bronze Material – Physical & Chemical Properties
Typical Chemical Composition (BS 1400 LG2)
| Element | % Range |
|---|---|
| Copper (Cu) | 85 – 88 |
| Tin (Sn) | 4 – 6 |
| Zinc (Zn) | 4 – 6 |
| Lead (Pb) | 4 – 6 |
| Others | < 0.5 |
Mechanical & Physical Properties
| Property | Typical Value |
|---|---|
| Tensile Strength | 220–260 MPa |
| Yield Strength | 120–140 MPa |
| Elongation | 10–15% |
| Hardness | 65–85 HB |
| Density | ~8.8 g/cm³ |
| Melting Range | 900–1000°C |
LG2 Bronze provides good thermal conductivity, moderate strength, and high machinability. The Lead phase improves lubricity, making it suitable for sliding components.
LG2 Bronze Pipe Fittings
LG2 Bronze Pipe fittings are widely used in plumbing, marine piping, fire-fighting systems, and industrial fluid handling. These include elbows, tees, reducers, couplings, flanges, and threaded adapters. The alloy’s pressure tightness ensures leak-free joints under static and moderate dynamic loads. LG2 Bronze fittings are compatible with BSP, NPT, and metric threading standards. Surface finishes include natural Bronze, shot-blasted, machined, nickel-plated, or tin-coated as per customer requirements. These fittings comply with BS 21, ASTM B62, IS 318, and DIN standards where applicable. Hydrostatic testing up to specified PSI ratings ensures performance reliability. Custom casting and machining allow us to produce non-standard dimensions as per customer drawings.
LG2 Gunmetal Casting Foundry
Our LG2 Gunmetal casting foundry in India integrates pattern making, sand moulding, melting, casting, heat treatment (if required), and CNC machining under one roof. Induction furnaces ensure precise temperature control and chemical homogeneity. Sand reclamation systems improve sustainability and consistency. We use spectrometers for chemical analysis and CMM machines for dimensional validation. Non-destructive testing (NDT) methods such as dye penetrant and hydrostatic testing are conducted for pressure components. Our facility is suitable for small batch prototype castings as well as bulk production runs. Customized packaging with customer labels and logos ensures export readiness. We export to USA, UK, Germany, UAE, and Australia.
LG2 Equivalent International Standards / Alloys
| Country | Equivalent Standard |
|---|---|
| UK | BS 1400 LG2 |
| USA | ASTM B62 C83600 (approx equivalent) |
| Germany | DIN CC491K |
| Europe | EN 1982 CC491K |
| India | IS 318 LTB2 |
| Japan | JIS BC6 |
| China | ZCuSn5Zn5Pb5 |
These equivalents ensure global interchangeability for OEMs requiring cross-reference compliance.
LG2 Bronze Sand Casting
LG2 Bronze Sand Casting is ideal for medium to large components with complex geometries. Green sand and chemically bonded sand moulds are used depending on surface finish and tolerance requirements. Sand casting allows flexibility in design, economical tooling costs, and suitability for customized low to medium volume production. Shrinkage allowances and gating systems are carefully designed to minimize internal defects. Post-casting processes include shot blasting, machining, drilling, tapping, threading, and pressure testing. Sand casting ensures cost-effective production of valve bodies, pump casings, and industrial fittings.
Typical Parts Produced from LG2
LG2 Bronze and LG2 Gunmetal are commonly used for:
Valve bodies, pump casings, impellers, bearing housings, marine fittings, Pipe fittings, fire hydrant components, gear blanks, pressure-tight covers, and hydraulic connectors. The alloy’s machinability allows threading, drilling, and precision finishing operations with high repeatability.
Illustrative Line Drawing – Typical Bronze Flanged Valve Body
| |
| | ØD
___| |___
| |
|_______ ØB ______|
|_____|
L
Typical Dimensional Chart
| Size (Inch) | ØD (mm) | ØB (mm) | Length L (mm) |
|---|---|---|---|
| 1” | 95 | 25 | 110 |
| 2” | 120 | 50 | 150 |
| 4” | 180 | 100 | 220 |
(Custom sizes manufactured as per drawing)
Industries Served
Water treatment plants, marine engineering, oil & gas auxiliary systems, fire protection, plumbing, HVAC, pump manufacturing, agricultural irrigation, and industrial fluid handling sectors rely on LG2 Bronze castings for long-term durability.
Performance Metrics
LG2 Bronze components demonstrate reliable hydrostatic pressure performance, corrosion resistance in freshwater and mild seawater, consistent machinability index above 80% (relative to free cutting Brass), and dimensional repeatability within controlled tolerance limits.
Why Choose Us – Our USP
With over 30 years of experience in Bronze and Copper alloy casting, we offer customized production flexibility, shorter lead times (4–6 weeks), technical drawing assistance, pattern development support, and strict quality control. Our communication clarity, global export experience, customized packaging solutions, and commitment to on-time delivery make us a preferred supplier. We provide spectrometer reports, material test certificates (MTC), and full traceability for every batch.
Packaging & Shipping
LG2 Bronze castings are packed in fumigated wooden crates, export-grade cartons, or customized pallets with corrosion protection. Each shipment includes inspection reports, material certificates, and labeling as per customer requirement. We support sea freight, air freight, and consolidated export logistics from India.
Customer Testimonial
John Matthews, Texas, USA
“Outstanding quality LG2 Bronze castings with consistent metallurgy and excellent machining finish. Delivery was on time and documentation was complete. Highly reliable Indian manufacturer for Bronze valve components.”
Frequently Asked Questions (Q&A)
Q1: Is LG2 Bronze suitable for potable water?
Yes, it is widely used in water systems under BS and ASTM guidelines.
Q2: What is the lead time?
Standard turnaround time is 4–6 weeks.
Q3: Can you supply fully machined components?
Yes, CNC machining is done in-house.
Q4: Do you provide MTC?
Yes, material test certificates are provided.
Q5: What casting process is used?
Primarily Sand Casting.
Q6: Do you export to USA?
Yes, regularly.
Q7: What are common equivalents?
ASTM C83600, EN CC491K, IS 318 LTB2.
Q8: Are custom sizes available?
Yes, as per drawings.
Q9: What surface finishes are available?
Natural, machined, Nickel plated.
Q10: Is pressure testing available?
Yes, hydrostatic testing on request.
Glossary of Terms
Leaded Bronze: Bronze alloy containing Lead for improved machinability.
Gunmetal: Traditional term for Tin Bronze casting alloy.
Sand Casting: Metal casting process using sand moulds.
Hydrostatic Testing: Pressure testing using water.
CNC Machining: Computer-controlled precision machining.
MTC: Material Test Certificate verifying composition and properties.
Related Terms
LG2 Bronze casting manufacturer India, LG2 Gunmetal Pipe fittings supplier, ASTM C83600 Bronze casting exporter, EN CC491K equivalent, Leaded Bronze valve body casting, Gunmetal sand casting foundry India, BS 1400 LG2 Bronze casting.
Call To Action
Looking for high-quality LG2 Bronze / LG2 Gunmetal Castings?
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Email: sales@cableglandsindia.com
Phone / WhatsApp: +91-22-43449300
Website: www.cableglandsindia.com
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