Our Gunmetal Casting and Bronze Casting division is built around precision, repeatability and deep metallurgical understanding of traditional Copper-based alloys. We are one of the leading manufacturers and exporters of Gunmetal Casting, LG2 Bronze Casting and 85-5-5-5 Bronze Casting or –  from India. We have been supplying high-integrity Bronze components to the world market for many decades. Over the years, our foundry has become known for high-performance castings used in Pumps, Valves, Marine Hardware, Bushings, Bearings, Flow Control Fittings and Custom Machined Bronze Parts across USA, UK, Germany, Australia and the Middle East. Our work integrates century-old sand-casting craftsmanship with modern CNC machining, spectrochemical analysis, green-sand systems, shell moulding and pressure-tight bronze metallurgy.
The page below provides a deep engineering-grade reference for buyers, inspectors, OEM engineers and procurement experts exploring LG2 Bronze Castings, C83600 Bronze, 85-5-5-5 Gunmetal, Leaded Bronze, Gunmetal Sand Casting Foundries in India, along with technical data, tolerances, global material standards, engineering diagrams and long-tail search keywords woven into natural writing.

Gunmetal Casting 

Gunmetal Casting, traditionally known as a Copper-Tin-Zinc-Lead alloy, continues to be one of the most dependable casting alloys for engineering applications requiring excellent machinability, high casting fluidity and good corrosion resistance. Our Gunmetal Castings comply with IS 318 Gr. LTB2, BS 1400 LG2, ASTM B505 C83600, DIN EN 1982 CC491K, JIS H5120 BC6, offering a perfect balance of strength and pressure tightness for Pump Housings, Impellers, Valve Bodies, Bearing Housings and Custom Bronze Engineering Components. We use high-purity virgin Copper, Tin, Zinc and controlled Lead levels while melting in Oil-Fired and Electric Crucible Furnaces, monitored with on-line spectrometer checks. The combination of Green Sand, Chemical Sand and Shell Molding enables excellent dimensional accuracy for complex cores. Gunmetal Castings are also preferred where machinability, vibration-damping and corrosion resistance in seawater are essential. Our Bronze foundry ensures minimum shrinkage defects, dense microstructure and smooth machined surfaces ideal for OEM-grade assemblies.

LG2 Bronze Casting 

LG2 Bronze Casting, equivalent to BS1400 LG2, IS 318 LTB2, UNS C83600, is the industry-standard Leaded Gunmetal used for critical Pump & Valve components worldwide. LG2 offers exceptional pressure tightness and is widely used for Bronze Bushes, Bearings, Thrust Washers, Pump Casings, Flow Meter Housings and Compressor Parts where sliding wear, embeddability and conformability are needed. Our LG2 Castings are produced using Green Sand Molding, No-Bake Molding and Shell Molding systems depending on the geometry and end-use environment. With a typical composition of Cu 84–86%, Sn 4–6%, Zn 4–6%, Pb 4–6%, LG2 Bronze delivers stable mechanical properties (UTS ~220–250 MPa) and excellent machinability on CNC turning centres. Components undergo strict dimensional checks, microstructure evaluation, hardness testing and spectrometer validation to ensure full compliance with global standards. We supply precision-machined LG2 Bronze Castings globally with full traceability, heat numbers and customized customer packaging.

85-5-5-5 Gunmetal Casting 

85-5-5-5 Gunmetal Casting is a premium grade Bronze alloy containing 85% Copper, 5% Tin, 5% Lead and 5% Zinc, widely appreciated for its anti-friction properties and exceptional resistance to dezincification. Known for its outstanding pressure tightness and machinability, 85-5-5-5 Castings are commonly used in Hydraulic Components, Valve Housings, Heavy Bushings, Marine Fittings, Wear Plates and Precision Bronze Machined Components. Our foundry consistently produces 85-5-5-5 Bronze Castings using Green Sand, Shell Molding and Precision No-Bake Systems, backed by melt-quality checks through Optical Emission Spectroscopy. This alloy is also suitable for heavy-duty applications requiring a high melting range, minimal gas absorption and excellent surface finish after machining. The superior lead distribution offers good embeddability, making it ideal for bearing surfaces under boundary lubrication. Our castings meet ASTM B505 C83600, BS1400 LG2 Equivalent and DIN CC491K specifications depending on customer drawings.

C83600 Bronze Casting

C83600 Bronze Casting, known as Leaded Red Brass or Leaded Gunmetal, is one of the most widely used Bronze casting alloys globally. The composition of Cu 84-86%, Sn 4–6%, Pb 4–6%, Zn 4–6% makes it highly machinable and suitable for castings requiring gas-tight structures. We specialize in C83600 Bronze Castings for OEM customers in USA, Canada and Europe where ASTM compliance, PPAP documentation and lot-level traceability are mandatory. Components such as Water Meter Housings, Pump Bodies, Valve Bodies, Flanges, Bearing Housings and Bronze Inserts are produced with shell moulding, green sand moulding and CNC finishing. Mechanical properties typically include Tensile Strength of 240 MPa, Hardness 70–90 HB and good elongation, which make C83600 extremely reliable in dynamic systems. We also offer NDT inspection, radiography (if required), CMM measurement and customized packaging with customer labels and barcodes.

Leaded Bronze Casting 

Leaded Bronze Castings offer a combination of lubricity, machinability and anti-seizure properties unmatched by most Copper alloys. Used extensively for Bearing Bushes, Heavy Thrust Washers, Gear Blanks, Worm Gear Wheels, Cage Bearings and Compressor Parts, this class of Bronze ensures low coefficient of friction even under poor lubrication. Our Leaded Bronze Castings cover grades such as IS 318 LTB1/LTB2/LTB3, ASTM B505 C93200, C93400, C83600, BS 1400, with customization according to wear performance. Lead enhances conformability while Tin improves strength, making these alloys suitable for high-load and oscillating motion systems. The castings undergo dimensional checks, tensile tests, Brinell hardness testing, grain-structure evaluation and ultrasonic (UT) screening on request. We produce Leaded Bronze Castings up to 120 kg per piece in Green Sand, and up to 25 kg in Shell Molding for improved dimensional accuracy.

Gunmetal Sand Casting Foundry 

Our Gunmetal Sand Casting Foundry in India has been supplying OEMs globally for three decades with high-precision Sand Cast Gunmetal Components. The foundry operates automated Green Sand Systems, air-set No-Bake moulds for large components, and shell moulding for intricate shapes. Gunmetal Sand Castings are preferred because they provide high dimensional stability, superior metallurgical consistency and unmatched cost-effectiveness for medium-volume production. Patterns are made using CNC-machined aluminum dies or wooden patterns depending on annual usage. Our moulding lines are supported by online sand testing systems, hardness monitors, flask-handling systems and core-shooters. All melts are checked with Spectro Analysis before pouring, ensuring exact match to LG2, 85-5-5-5, C83600 and Leaded Bronze chemistry. Our foundry exports to USA, UK, Germany and Australia with full documentation, PPAP files and international packaging standards.

Gunmetal Green Sand Casting 

Green Sand Casting for Gunmetal is ideal for repeated production of complex shapes with uniform wall thickness. Our Green Sand Casting operations use controlled moisture levels, bentonite-based clay, high-purity silica sand and coal dust additives to achieve clean casting surfaces. Gunmetal Green Sand Casting provides excellent fluidity, minimal gas porosity and high repeatability for items such as Valve Bodies, Impellers, Pump Casings, Bearings and Marine Hardware. Mould hardness is maintained between 80–90 on the B-scale to ensure minimal collapse and strong dimensional control. Our Green Sand line supports components up to 65 kg per piece. Because of our deep metallurgical experience, we can optimize pouring temperature, gating systems, riser design and feeder sleeves to reduce shrinkage in Gunmetal Castings. Finished castings undergo shot-blasting, fettling, machining and dimensional validation before export packing.

LG2 Green Sand Casting 

LG2 Green Sand Casting allows cost-effective Lg2 Bronze production with excellent control over chemical composition and surface finish. LG2 is one of the most frequently cast alloys in our facility due to its wide industrial acceptance and stable casting behavior. Using our high-strength green sand system, the LG2 Bronze Gunmetal alloy flows uniformly into mould cavities, enabling clean cast surfaces and dense microstructure. Applications include Bronze Bearings, Pump Parts, Valve Assemblies, Couplings, Meter Housings, Bronze Inserts and Custom Dev-Engineered Components. We perform spectrometer checks for every batch and maintain strict pouring temperatures around 1080–1150°C for optimum flow. Engineers regularly evaluate gating systems and feeders to ensure defect-free castings. Components are later CNC-machined with tight tolerances to meet ASTM, BS or DIN requirements.

85-5-5-5 Bronze Casting

85-5-5-5 Bronze Casting is one of the most reliable alloys for premium mechanical strength, excellent machinability and anti-corrosion performance. Our 85-5-5-5 Bronze Casting process delivers high density and uniform lead distribution essential for friction-bearing applications. With high Tin content, the alloy provides structural integrity, while Lead provides lubricity ideal for rotating or sliding assemblies. We cast parts for OEMs in automotive, marine, pump, textile and hydraulic industries across the world. Using Shell Molding for smaller precision parts and Green Sand for larger parts, we achieve consistent dimensional repeatability. Spectrometer checks, hardness control, microstructure examination and pressure-tightness testing ensure fully compliant castings. Our engineering team reviews drawings and can suggest optimization for machining reliefs, draft angles and core placements.

836 Bronze Casting Foundry India 

As a specialized 836 Bronze Casting Foundry in India, AKA CDA 836 Bronze casting , we produce components under ASTM B505, BS LG2 and DIN CC491K equivalents for global OEMs. C83600 Bronze, also referred to as 85-5-5-5 or Leaded Red Brass, offers the perfect mix of strength, conductivity and machinability. Our foundry supports high-precision castings through Green Sand, No-Bake and Shell Molding processes. Components include Bushings, Bearings, Valve Components, Flanges, Marine Fittings, Pump Casings and Meter Bodies. With our advanced spectrometer, muffle furnace for microstructure testing, tensile testing and strict process control, we maintain consistent mechanical properties and casting soundness. Export packaging, barcoding, wooden pallets, fumigated boxes and custom branding are routinely provided for international customers. Our 30-year experience ensures reliable supply with 4–6 week turnaround even during peak seasons.

836 Bronze Shell Molding & Casting 

836 Bronze Shell Molding enables fine surface quality, sharp dimensional accuracy and reduced machining allowance due to the smoothness of resin-coated sand. Our Shell Molding line is ideal for high-precision Bronze parts with close tolerances, complex cores and thin wall sections. The alloy C83600 offers excellent castability under Shell Molding due to uniform metal flow and controlled solidification. We produce intricate Bronze Housings, Meter Components, Gears, Valve Bonnets, Impellers and Bushes with high consistency. Shell moulds are heated uniformly to ensure proper curing and shell formation. All castings undergo fettling, shot-blasting, pressure testing (if required), CNC machining and full dimensional inspection. Our quality team verifies dimensional tolerance, concentricity, roughness and hardness before dispatch. With our ability to scale from prototypes to mass production, OEMs worldwide rely on our foundry for Shell Molding Bronze parts.

Material Grades and International Standards

Manufacturing Processes & Machinery Used

Typical Parts Produced

• Pump Impellers, Casings, Meter Bodies

• Valve Bodies, Bonnets, Seats, Flanges

• Bushings, Bearings, Wear Plates

• Marine Bronze Hardware

• Compressor & Hydraulic Bronze Components

• Custom Bronze CNC Machined Parts

Dimensional Table (Example – Bush/Flange Bush)

Surface Finish & Plating Options

• Natural Bronze Machined Surface

• Shot-blasted Bronze

• Polished Bronze

• Tin Plating (if required)

• Nickel Plating for special applications

• Passivation & Anti-rust Coating for export shipments

Industries Using Our Bronze & Gunmetal Castings

Marine Engineering, Pump & Valve Manufacturers, Flow Meter OEMs, Fire-Fighting Equipment, Heavy Automotive, Hydraulics, Glass Machinery, Textile Machinery, Agricultural Equipment, Petrochemical Plants, HVAC & Compressor Industries.

Tolerance Capability

• Sand Casting: ±0.5–1.5 mm

• Shell Molding: ±0.2–0.5 mm

• CNC Machining: ±0.02–0.10 mm

Turnaround Time

4–6 Weeks from pattern approval or PO confirmation.

Performance Metrics

Why Choose Us? 

For over three decades, we have supplied high-precision Bronze and Gunmetal Castings to global OEMs. Customers value our excellent communication, flexible production planning, ability to deliver customized castings, engineering assistance for drawing modifications, and problem-solving approach. Our global exposure ensures familiarity with USA/UK/EU standards and documentation such as PPAP, COC, Heat Numbers, Inspection Reports and Custom Packaging with private logos/labels. Whether for prototypes or large-volume exports, we maintain timely deliveries, consistent metallurgy and 100% traceability.

Customer Testimonials

John Adams, Texas, USA:
“Your LG2 Bronze Castings have been unbelievably consistent. The machining allowance, surface finish and dimensional accuracy saved us hours on our CNC line.”

David Hargreaves, Birmingham, UK:
“We shifted our entire Gunmetal Casting requirement to your foundry. Communication is prompt, packaging is world-class and every shipment meets our quality expectations.”

Typical Q & A (15 Questions)

Q1. What is the difference between Gunmetal and LG2 Bronze?
Gunmetal is a category; LG2 is a specific high-performance Gunmetal grade with fixed chemistry under BS 1400.

Q2. Why is C83600 Bronze preferred in USA?
Because ASTM B505 C83600 offers predictable mechanical properties and excellent machinability.

Q3. What casting process is best for Bronze Bearings?
Green Sand for large sizes; Shell Molding for small precision bearings.

Q4. Can you supply pressure-tight Bronze Castings?
Yes, our alloys like LG2, C83600 and 85-5-5-5 give excellent pressure tightness.

Q5. Do you provide machining along with casting?
Yes, complete CNC machining, tapping, threading, milling and finishing.

Q6. What documentation is included?
COC, Spectro Test Report, Dimensional Report, Packaging List and photos.

Q7. Can you match material with European DIN standards?
Yes, we supply CC491K, CuSn5Zn5Pb5 equivalents.

Q8. What is your minimum order quantity?
Generally 50–100 kg per item; flexible for development parts.

Q9. What is your usual tooling/pattern development time?
7–10 days depending on complexity.

Q10. Can you customize packaging?
Yes, with customer logo, barcode labels and export-grade pallets.

Q11. What is the maximum casting weight?
Up to 120 kg in sand casting and 25 kg in shell moulding.

Q12. Do you ship worldwide?
Yes, via sea or air to USA, UK, Europe, Australia and Middle East.

Q13. Can you assist with drawing modifications?
Yes, our engineering team suggests improvements for better manufacturability.

Q14. Which Bronze grade is best for bearings?
Lead-containing Bronze such as LTB1, LTB2 or C93200.

Q15. Do you offer prototypes?
Yes, small batch prototypes with fast turnaround.

Packaging & Shipping

We offer Fumigated Wooden Boxes, Pallets, Bubble-Wrapped Bronze Parts, Anti-Corrosion Paper, Barcode Labels, Customer Branding and HDPE Bags. Shipments move via courier, air freight or sea freight based on requirement.

Glossary of Terms (With Keywords)

Gunmetal: Copper-Tin-Zinc-Lead alloy used in castings.
LG2 Bronze: High-performance Leaded Gunmetal grade.
Green Sand Casting: Moist clay-bonded sand moulding process.
Shell Molding: Resin-coated sand moulding used for precision Bronze parts.
C83600: ASTM Leaded Red Brass Bronze alloy (85-5-5-5).
LB2/LTB2: Indian Leaded Bronze grades with excellent machinability.
Machined Bronze Components: CNC finished Bronze & Gunmetal parts.

Related Parts:

Gunmetal Casting India, LG2 Bronze Supplier, C83600 Bronze Exporter, 85-5-5-5 Bronze Manufacturer, Leaded Bronze Bushes, Gunmetal Foundry India, Bronze Pump Parts, Shell Moulding Bronze, Green Sand Bronze Casting, OEM Bronze Valve Body Castings.

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Updated: 2025-26