LG4 Bronze / CC492K Bronze Casting Foundry – High Quality Leaded Gunmetal Castings from India

LG4 Bronze (EN 1982 CC492K) is a high-tin Leaded Gunmetal casting alloy engineered for higher strength, superior wear resistance, and reliable pressure tightness compared to standard LG2 Bronze. We are a leading manufacturer and exporter of LG4 Bronze / CC492K Bronze Castings from India, supplying bearing bushes, valve bodies, worm wheels, pump components and marine hardware to OEMs across the USA, UK, Europe, Middle East and Australia. Our integrated sand casting foundry and in-house CNC machining shop ensure dimensional accuracy, metallurgical consistency and repeatable quality on every batch. LG4 Bronze / CC492K is prized for its excellent bearing properties, higher tensile strength, and outstanding resistance to wear under load, making it the preferred alloy for bushings, thrust washers, worm gears and high-pressure fittings. We manufacture LG4 Bronze castings as per BS, EN, ASTM, IS and JIS equivalent standards. Indicative Price: US$ 15.40 per kg (ex-works Jamnagar, India; subject to alloy, quantity and specification). Standard turnaround time is 4–6 weeks depending on tooling and batch size.

LG4 Bronze

LG4 Bronze is a high-tin Leaded Gunmetal casting alloy specified historically under BS 1400: LG4. Unlike LG2, which relies on balanced tin, zinc and lead additions, LG4 Bronze carries a higher tin content and reduced zinc, giving it improved strength, hardness and bearing performance. The alloy retains good castability in sand moulds and machines cleanly, producing a smooth surface finish suitable for precision bores and running fits. LG4 Bronze is widely specified for bushings, bearings, worm wheels, slide blocks and wear plates that must withstand sustained mechanical loading. Its corrosion resistance in fresh water, mild marine environments, and industrial atmospheres makes it a dependable choice for long service life components. LG4 Bronze castings are typically supplied as-cast, shot-blasted, or fully CNC machined to finished dimensions.

CC492K Bronze

CC492K is the EN 1982 designation commonly referenced as the European equivalent of BS 1400 LG4 Leaded Gunmetal. CC492K Bronze combines higher tin content with controlled lead and zinc additions to deliver a favourable balance of strength, ductility and machinability. The alloy is well suited for pressure-retaining components, bearing bushes and high-load wear parts where LG2 / CC491K would be considered under-specified. CC492K Bronze offers good resistance to dezincification, reliable performance in potable water systems, and consistent metallurgical structure when produced under controlled sand casting conditions. Our CC492K Bronze castings undergo spectrometer-based chemical verification and mechanical testing to confirm compliance with BS, EN and other international equivalents.

LG4 Bronze Casting Process

LG4 Bronze / CC492K Casting is produced primarily through Sand Casting, with shell moulding used for smaller precision components. Pattern development is followed by mould preparation using high-grade silica sand and chemically bonded binders. Molten LG4 Bronze is poured at controlled temperatures to achieve optimal grain refinement and minimize shrinkage porosity. Gating and riser systems are engineered to maximize casting yield and soundness. After solidification, castings undergo fettling, shot blasting, dimensional inspection and hydrostatic pressure testing where required. Precision CNC machining achieves final tolerances up to ±0.05 mm depending on component geometry. Our LG4 Bronze casting foundry is equipped with induction furnaces, sand mixers, moulding lines, CNC machining centres and a metallurgical testing lab to guarantee repeatable quality on every order.

LG4 Bronze Material – Physical & Chemical Properties

Typical Chemical Composition (BS 1400 LG4 / EN 1982 CC492K)

Mechanical & Physical Properties

LG4 Bronze provides higher strength and superior bearing performance compared to standard LG2 Bronze, owing to its increased tin content. The alloy maintains good thermal conductivity and machinability while offering improved wear resistance under sliding load conditions.

LG4 Bronze Pipe Fittings & Typical Parts

LG4 Bronze / CC492K components are widely used where higher strength and bearing performance are required beyond standard Gunmetal fittings. Typical parts include the following:

LG4 Bronze fittings are compatible with BSP, NPT and metric threading standards. Surface finishes include natural Bronze, shot-blasted, machined, or nickel-plated as per customer requirements. Custom casting and machining allow us to produce non-standard dimensions as per customer drawings.

CC492K Bronze Casting Foundry

Our LG4 Bronze / CC492K casting foundry in India integrates pattern making, sand moulding, melting, casting, and CNC machining under one roof. Induction furnaces ensure precise temperature control and chemical homogeneity across every heat. Sand reclamation systems improve sustainability and casting consistency. We use spectrometers for chemical analysis and CMM machines for dimensional validation. Non-destructive testing methods such as dye penetrant inspection and hydrostatic testing are conducted for pressure-retaining components. Our facility supports both small-batch prototype castings and bulk production runs, with customized export packaging and labelling. We regularly export LG4 Bronze / CC492K castings to the USA, UK, Germany, UAE and Australia.

LG4 Equivalent International Standards / Alloys

These equivalents are indicative and intended to assist OEMs with cross-reference comparison; exact chemical limits vary slightly between standards.

LG4 Bronze Sand Casting

LG4 Bronze Sand Casting is ideal for medium to large bearing and pressure components requiring higher strength than standard Gunmetal. Green sand and chemically bonded sand moulds are selected depending on surface finish and tolerance requirements. Sand casting provides design flexibility, economical tooling, and suitability for low to medium volume custom production. Shrinkage allowances and gating systems are engineered to minimize internal defects such as porosity and hot tearing. Post-casting operations include shot blasting, CNC machining, drilling, tapping, threading and pressure testing as required. Sand casting ensures cost-effective production of bearing bushes, valve bodies and industrial wear components.

Typical Parts Produced from LG4 / CC492K

LG4 Bronze and CC492K Bronze are commonly used for: bearing bushes, thrust washers, worm wheels, gear blanks, slide blocks, wear plates, high-pressure valve bodies, pump impellers and casings, marine propeller hub components, bridge bearing plates, and guide bushes. The alloy’s combination of strength and machinability allows threading, boring and precision finishing operations with high repeatability.

Typical Dimensional Chart – Bronze Bearing Bush

(Custom sizes manufactured as per drawing)

Industries Served

Pump manufacturing, valve engineering, marine and offshore hardware, bridge and structural bearings, HVAC, water treatment plants, material handling equipment, and industrial machinery manufacturers rely on LG4 Bronze / CC492K castings for long-term durability under load.

Performance Metrics

LG4 Bronze components demonstrate reliable performance under sustained bearing load, corrosion resistance in freshwater and mild marine environments, higher tensile and yield strength than standard LG2 Gunmetal, and consistent 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

LG4 Bronze / CC492K castings are packed in fumigated wooden crates, export-grade cartons, or customized pallets with corrosion protection. Each shipment includes inspection reports, material certificates, and labelling as per customer requirement. We support sea freight, air freight, and consolidated export logistics from India.

Customer Testimonial

“Consistent metallurgy, excellent bearing performance and on-time delivery. Documentation was complete and the LG4 Bronze bushings performed exactly to specification.”
— Procurement Manager, Industrial Pumps OEM, USA

Frequently Asked Questions (Q&A)

Q1: How is LG4 Bronze different from LG2 Bronze?
LG4 Bronze contains higher tin and lower zinc than LG2, giving it greater strength and improved bearing/wear performance.

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 and Europe?
Yes, regularly.

Q7: What are common equivalents?
ASTM B584 C90500, EN 1982 CC492K, IS 318 LTB4 (approx equivalents).

Q8: Are custom sizes available?
Yes, as per drawings.

Q9: What is the current price?
Indicative price is US$ 15.40 per kg, ex-works Jamnagar, India, subject to quantity and specification.

Q10: Is pressure testing available?
Yes, hydrostatic testing on request.

Glossary of Terms

Leaded Gunmetal: Tin-Zinc-Copper alloy with Lead additions for improved machinability.
High-Tin Bronze: Bronze alloy with elevated Tin content for improved strength and wear resistance.
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

LG4 Bronze casting manufacturer India, CC492K Bronze casting foundry, EN 1982 CC492K equivalent, ASTM C90500 Bronze casting exporter, Leaded Gunmetal bearing bush casting, High-tin Bronze sand casting foundry India, BS 1400 LG4 Bronze casting.

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Email: sales@cableglandsindia.com
Phone / WhatsApp: +91-22-43449300
Website: www.cableglandsindia.com

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