Bronze Casting | Bronze Casting Foundry in India

 PRICE: US$11/Kilogram

Bronze Casting is one of the oldest and most trusted metal‐forming processes, delivering exceptional mechanical strength, corrosion resistance, and dimensional stability for industrial and engineering applications. We are one of the leading manufacturers and exporters of Bronze Castings from India. We have been supplying Aluminium Bronze, Leaded Bronze, Silicon Bronze, Nickel Bronze and custom Bronze alloys to the world market for many decades. With more than 30 years of engineering experience, global exposure, and an in-house metallurgical team, we produce high-precision Bronze cast components for OEMs across the USA, UK, Europe, Middle East, and Australia. Our Bronze Casting Foundry in India uses a combination of Sand Casting, Shell Molding, Permanent Mold Casting, Gravity Casting, and Centrifugal Casting to achieve high repeatability, excellent surface finish, and controlled microstructure. Our expertise covers both small intricate Bronze machined parts and large engineering castings. Every casting is supported with detailed metallurgical testing, machining capability, plating options, 3D scanning, and application-specific heat-treatment to deliver consistent performance under the most demanding environments. (Updated: 2025)

Bronze Casting 

Bronze Casting involves melting Bronze alloys and pouring the molten metal into engineered molds that allow precise shaping, controlled shrinkage, and optimal metallurgical properties. Our Bronze castings are used for heavy-duty bearings, bushings, marine hardware, gear wheels, valve bodies, pump components, and electrical connectors that require high wear resistance, anti-seizing properties, and long fatigue life. With advanced melting furnaces, sand reclamation systems, spectrometers, and CNC machining centers, we guarantee dimensional accuracy and metallurgical consistency for each shipment. The Bronze castings are produced in conformance with global standards such as ASTM B22, ASTM B505, ASTM B271, IS 318, IS 305, DIN 1716, BS 1400, and customer-specific engineered grades. The components undergo strict inspection—chemical, mechanical, hardness, tensile, impact, porosity assessment, and microstructure analysis—to ensure reliability in all field conditions. Our foundry engineers are trained to optimize gating design, riser calculations, solidification times, and feeding paths to improve yield and reduce defects like gas porosity, shrinkage, and inclusions.

Aluminium Bronze Casting

Aluminium Bronze Casting is ideal for highly corrosive and high-load environments where high strength, cavitation resistance, and seawater corrosion resistance are mandatory. Alloys such as C95400, C95500, C95600, C95800, C63000, and AB2 are widely used in marine propulsion systems, pumps, valves, turbine blades, aerospace fittings, and heavy engineering components. Aluminium Bronze offers yield strength comparable to some Stainless Steels while maintaining superior resistance to chlorides and sulphides. In our foundry, Aluminium Bronze Casting is performed using controlled melting in induction furnaces to prevent hydrogen absorption and oxide formation. We follow ASTM B505 and ASTM B148 casting standards and deliver fine grain structures via controlled cooling, ensuring excellent fatigue strength and dimensional stability. Aluminium Bronze is also preferred for explosive-free zones because of its non-sparking characteristics, making it the first choice for offshore rigs, petrochemical plants, oil & gas handling, and mining applications. Every Aluminium Bronze casting undergoes ultrasonic testing, dye-penetrant testing, and hardness checks (typically 150–180 HB depending on the grade) to ensure consistent field performance.

Leaded Bronze Casting

Leaded Bronze Castings (typically C93200, C93500, C93700, C83600, LG2) are the industry’s preferred choice for bearings, bushings, wear plates, and sliding components due to their excellent lubricity and conformability. The presence of Lead improves machinability, reduces friction, and enables good seizure resistance, especially in boundary-lubrication environments. Our Leaded Bronze foundry optimizes the melt using degassing tablets and dross-skimming techniques to ensure a clean microstructure. The castings conform to ASTM B505, BS 1400 LG2, IS 318 Gr. LTB2 and similar global equivalents. Leaded Bronze is especially suited for gearbox bearings, agriculture machinery bushings, textile machinery parts, heavy truck components, and industrial sliding pads. The castings undergo chemical analysis, Brinell hardness checks (typically 65–85 HB), and dimensional verification using CMM. For critical applications, we provide phosphorous-modified Leaded Bronze to enhance wear resistance without sacrificing machinability.

Silicon Bronze Casting

Silicon Bronze Castings (alloys such as C87300, C87500, C87600, C65100, C65500) offer excellent corrosion resistance, weldability, and electrical conductivity. These alloys are widely used in marine hardware, architectural hardware, instrumentation parts, electrical connectors, artistic sculptures, and structural components requiring exceptional aesthetic appeal combined with metallic integrity. Silicon Bronze resists dezincification, pitting, and stress-corrosion cracking, making it ideal for saltwater applications. In our casting process, Silicon Bronze is melted under controlled flux cover to prevent oxygen absorption and to maintain consistent silicon content. We follow strict solidification control to prevent shrinkage cavities. Silicon Bronze machined parts offer excellent surface finish, and they are frequently used in high-end decorative components. Our Silicon Bronze Castings conform to ASTM B98, ASTM B584, BS 1400 PB1, DIN EN 1982, and several proprietary compositions depending on customer requirements.

Sand Casting of Aluminium Bronze

Sand Casting of Aluminium Bronze is ideal for medium-to-large parts where complex shapes, variable wall thickness, and economical tooling are required. Using high-thermal-strength silica sand mixed with resin binders, we create precision molds for parts up to 300 kg. Sand-cast Aluminium Bronze components include valve bodies, pump casings, marine hardware, impellers, bush housings, and heavy load-bearing components. The sand molds are formed using either fully automated sand-molding machines or manual green-sand molds depending on part geometry. During pouring, temperature control (typically 1250–1320°C) is critical to avoid gas porosity. Our gating systems are simulated through solidification software to control shrinkage and improve yield. After casting, the components undergo shot blasting, fettling, machining, and final inspection. Sand Casting offers excellent flexibility, making it suitable for prototype development and small-to-medium batch production.

Permanent Mold Casting of Bronze

Permanent Mold Casting of Bronze (also called Gravity Die Casting) uses reusable metal molds—typically made from cast iron or steel—to produce high-repeatability parts with superior surface finish and minimal porosity. This method is especially effective for Silicon Bronze, Aluminium Bronze, and Nickel Bronze alloys. Baking, preheat cycles, and mold coatings (graphite, boron nitride) ensure consistent solidification. Typical Permanent Mold Bronze parts include marine fittings, electrical connectors, water pump housings, architectural hardware, and engineering brackets that require stronger mechanical properties than sand castings. Permanent molds produce much better dimensional tolerance (up to ±0.25 mm) and faster cooling rates, resulting in refined grain structures. We use hydraulic tilting mechanisms, temperature-controlled mold stations, and automated pouring systems to ensure consistent quality and high productivity.

Shell Molding (Resin Sand Casting) of Bronze

Shell Molding—also known as Resin Sand Casting—is ideal for producing Bronze components with high dimensional accuracy, smooth surface finish, and minimal machining allowance. In this process, resin-coated sand is heated to form thin shell molds with excellent rigidity. Shell-mold Bronze castings are used for small to medium components such as connectors, electrical terminals, decorative hardware, pump impellers, and precision engineering parts. The shell-mold process produces castings with good dimensional repeatability, low gas defects, and superior surface finish (125–200 RMS). It is often the preferred method for complex Bronze parts requiring tight tolerances and intricate shapes. Our shell molding lines are equipped with automated sand coating equipment, heating ovens, pattern plates, and dust-free pouring stations to ensure consistent quality.

Green Sand Casting of Bronze

Green Sand Casting of Bronze uses moisture-bound silica sand, bentonite clay, and additives to form reusable molds that are economical and highly versatile. This process is widely used for Bronze impellers, bearing housings, brackets, flanges, gears, and large industrial components. Green sand is extremely flexible and allows rapid turnaround for prototype and production runs. The natural permeability of green sand helps reduce gas porosity in Bronze. Our foundry uses advanced green-sand molding machines, sand-mixers, moisture controllers, and compressibility testers to maintain consistent mold quality. For Bronze, which is prone to gas pickup, we employ deoxidizing tablets and controlled pouring to ensure defect-free casting.

Gravity Casting of Bronze

Gravity Casting is a versatile method where molten Bronze flows under its own weight into precision-engineered molds. This method provides high density, excellent mechanical properties, and minimal turbulence during metal flow. Gravity Cast Bronze components include valve components, hydraulic fittings, marine parts, industrial bearings, and automotive connectors. It delivers better mechanical strength than sand casting and reduces the likelihood of shrinkage defects due to directional solidification. Our gravity casting facility is equipped with multi-cavity molds, die-coating stations, molten-metal temperature controllers, and automated tilting mechanisms. Dimensional tolerances typically fall within IT12–IT14 depending on geometry.

Centrifugal Casting of Bronze

Centrifugal Casting of Bronze is ideal for cylindrical and tubular components requiring defect-free structure, fine grain, and uniform mechanical properties. The molten Bronze is poured into a spinning mold, forcing impurities outward and producing a dense, porosity-free casting. Common products include Bronze bushings, sleeves, large bearings, gear blanks, rings, and pump wear rings. We manufacture centrifugal castings up to 900 mm outer diameter using both horizontal and vertical centrifugal machines. Typical tolerances are close and machining allowances are minimal due to the superior surface finish. All centrifugal cast Bronze alloys follow ASTM B271 and equivalent standards.

Master List of International Bronze, Aluminium Bronze, Leaded Bronze, Silicon Bronze, Nickel Bronze Alloys

(USA • Europe • UK • India • Japan • China • ISO)

Aluminium Bronze (ASTM / UNS / BS / DIN / JIS / IS / GB)
C95200, C95300, C95400, C95500, C95600, C95700, C95800, C63000, C63020, C95510, CB1, CA104, AB1, AB2, IS 305, IS 306, DIN CuAl10Fe5Ni5, CuAl10Fe3, CuAl11Fe6Ni6, GB QAl9-2, QAl10-3-1.5, JIS CAC703, CAC703W.

Phosphor Bronze / Tin Bronze
C51000, C51100, C52100, C54400, PB1, PB2, PB102, CuSn5, CuSn8, CuSn10, IS 7814, IS 292, DIN EN 1982 CC483K, CC480K.

Leaded Bronze
C93200, C93400, C93500, C93600, C93700, C93800, C83600, LG2, LTB1, LTB2, IS 318, DIN EN CC491K, GB ZCuSn10Pb1.

Silicon Bronze
C65100, C65500, C87300, C87500, C87600, HTB1, DIN CuSi3Mn1, GB QSi3-1.

Nickel Bronze / Copper-Nickel Alloys
C96200, C63000, C63020, CuNi10Fe1Mn, CuNi30Mn1Fe, (also overlaps with Aluminium Bronze).

Manganese Bronze
C86200, C86300, C86500, BS CZ114, DIN CuZn22Al2.

Other Bronze Alloys
C90700, C90800, C91000, C91100, C91300, C91700, CC333G, CC334G, CC335G (EN standards).

Typical Parts Produced

Bronze Bearings, Bushings, bronze Ground rod couplers,  Bronze transformer connectors, Ground rod conenctors, Bronze Vise Connectors, Bronze Hotline Clamps, bronze Marine Hardware, Propeller Components, Bronze Pump Impellers, bronze Valve Bodies, Pump Components, Gear Blanks, Electrical Connectors, Bronze transformer Spade terminals, Bronze Spades and Transformer Parts, Industrial Brackets, Wear Plates, Decorative Hardware, Architectural Bronze Hardware.

Material Properties (Typical Ranges)

Size & Dimensional Capability Table

Capabilities, Machinery & USP

Our facility includes induction furnaces, sand-molding lines, gravity die-casting stations, shell-molding machines, CNC machining centers, VMCs, SPMs, spectrometers, Brinell hardness testers, ultrasonic flaw detectors, and CMM for dimensional accuracy.
USP Highlights:
Flexible production timelines, 4–6 week turnaround, custom labels and packaging, ability to suggest drawing improvements, 3-decade global exposure, strong customer communication, dedicated technical support, defect-free metallurgy, and compliance with global standards.

Packaging & Shipping

Each Bronze casting is packed with VCI protection, anti-rust coating, foam inserts, and custom labels with customer logos. We ship worldwide via air, sea, or courier with complete paperwork (COO, packing list, MSDS, heat-numbers, inspection files).

Customer Testimonials

James Turner (USA) – “The Aluminium Bronze castings we receive are consistently precise and exceptionally clean. Communication and technical guidance are world-class.”
Oliver Grant (UK) – “Their Silicon Bronze components outperform every previous supplier. Excellent engineering team and dependable delivery schedules.”

FAQ (15 Questions, keyword-rich, 3–4 lines each)

1. What makes your Bronze Casting foundry in India reliable for international buyers?
   We follow ASTM, BS, DIN, and IS standards, supply chemical certification, offer CNC machining, and ensure strict metallurgy. Decades of exporting to USA/UK/EU ensure consistency.

2. Which Aluminium Bronze alloys do you cast?
   We cast C95400, C95500, C95600, C95800, C63000, and other equivalent DIN/BS/IS grades. All alloys undergo spectrometer testing before pouring.

3. Do you supply Leaded Bronze bearings and bushings?
   Yes, we produce C93200, C93700, C83600, LG2, LTB2 bushings with high load-carrying capacity and excellent machinability.

4. What is your typical casting turnaround time?
   Most Bronze castings are produced within 4–6 weeks, including machining, testing, packaging, and export documentation.

5. What casting methods do you use for Bronze?
   We offer Sand Casting, Green Sand, Shell Molding, Gravity Casting, Permanent Mold Casting, and Centrifugal Casting depending on part geometry.

6. Do you help optimize customer drawings?
   Yes. Our engineering team proposes improvements in tolerances, fillets, gating, weight reduction, and manufacturability.

7. Can you cast complex Silicon Bronze components?
   Absolutely. Silicon Bronze is ideal for intricate shapes, and our shell-molding process ensures excellent detail capture.

8. Do you supply heat-treated Aluminium Bronze?
   Yes. We offer solution-annealed and age-hardened Aluminium Bronze castings to improve strength and corrosion resistance.

9. Are Bronze castings suitable for marine applications?
   Aluminium Bronze and Silicon Bronze are highly corrosion-resistant and commonly used in seawater and offshore environments.

10. What is your maximum casting weight capability?
    Up to 300 kg for sand castings and up to 900 mm OD for centrifugal cast rings.

11. Do you provide machining along with casting?
    Yes. We offer full CNC machining, threading, drilling, tapping, milling, boring, and surface finishing.

12. What industries use your Bronze castings?
    Oil & Gas, Marine, Electrical, Power Transmission, Hydraulic Pumps, Automotive, Construction, and General Engineering.

13. Do you offer custom alloys or proprietary compositions?
    We can cast custom Bronze alloys based on customer metallurgy and design specifications.

14. Are your Bronze castings pressure-tight?
    Yes. We perform pressure-tightness testing, porosity evaluation, and ensure proper solidification control.

15. Which certifications do you provide with shipments?
    Chemical test, mechanical test, hardness report, dimensional report, packing details, heat numbers, and material traceability.

Glossary of Terms 

Sand Casting: Bronze casting method using bonded sand molds.
Aluminium Bronze: High-strength Bronze alloy with Aluminium and Iron.
Leaded Bronze: Lubricity-enhanced Bronze with excellent machinability.
Silicon Bronze: Corrosion-resistant Bronze with Silicon.
Centrifugal Casting: Method for cylindrical Bronze castings using rotational force.
Gravity Casting: Permanent mold casting using gravity flow of molten metal.
CMM: Coordinate Measuring Machine for precision dimensional checks.
PB1/PB2: Standard Phosphor Bronze grades for bearings.

Related Parts:

Bronze Bushings India, Aluminium Bronze Casting India, Silicon Bronze Foundry, Bronze Sand Casting Manufacturer, Bronze Gravity Casting Supplier, Bronze Investment Casting Alternative, Non-Ferrous Foundry India, Copper-Alloy Castings Exporter.

Call to Action (CTA)

For detailed drawings, quotations, catalogues, or export inquiries, email us, request a quote, or contact us via phone/WhatsApp. Our engineering team will respond immediately with technical support and personalized guidance.