C87600 Silicon Bronze Casting

C87600 Silicon Bronze Casting | CC211A Silicon Bronze

C87600 Silicon Bronze casting (UNS C87600), known internationally as CC211A (BS EN 1982), DIN CuSi3, and IS 318 Gr.SiB2, is a medium-silicon copper alloy with 3.0-5.0% silicon and 0.8-1.5% manganese. Electrical Accessories India manufactures C87600/CC211A silicon bronze castings using sand casting, investment casting, centrifugal casting, green sand casting, and permanent mold casting for marine, electrical, architectural, and chemical plant applications worldwide.

C87600 offers a superior combination of mechanical strength (430 MPa tensile, 170 MPa yield), corrosion resistance in seawater and industrial atmospheres, and outstanding weldability compared to most copper casting alloys. Its higher silicon content relative to C87300 delivers greater hardness (90-130 HB) and corrosion resistance, making it the preferred silicon bronze for demanding marine hardware and chemical plant electrical installations.

C87600 / CC211A Silicon Bronze Chemical Composition and Properties

C87600 Silicon Bronze Casting Processes

C87600 Silicon Bronze Sand Casting

C87600 Silicon Bronze Sand Casting is the most versatile process for large and complex C87600 components. Furan resin-bonded sand moulds accommodate weights from 0.05 kg to over 200 kg. Melt temperature 1050-1100 deg C. Tolerances CT7-CT9, surface finish Ra 6.3-12.5 um. Lead times 1-2 weeks from existing patterns. Ideal for valve bodies, pump housings, large marine hardware, earthing hardware, and architectural castings requiring medium-quality surface finish.

Applications: Valve bodies for chemical plant, large marine hardware, earthing system hardware, architectural castings, pump casings, conduit fittings.

C87600 Silicon Bronze Centrifugal Casting

C87600 Silicon Bronze Centrifugal Casting produces hollow cylindrical C87600 components with excellent microstructural soundness. Centrifugal force (60-80g) drives the melt to the mould wall, expelling inclusions and gas to the bore. Achieves tolerances CT5-CT6 with bore finish Ra 3.2-6.3 um before machining. The high silicon content of C87600 contributes to exceptional surface hardness after centrifugal casting, ideal for bearing and bushing applications.

Applications: Marine shaft bushings, seawater pump bushings, chemical plant valve seats, pipe flanges, cylindrical connector and fitting bodies.

C87600 Silicon Bronze Investment Casting

C87600 Silicon Bronze Investment Casting (lost-wax process) achieves the highest dimensional accuracy (CT4-CT5, plus or minus 0.15 mm) and finest surface finish (Ra 1.6-3.2 um as-cast) of all C87600 casting processes. The 3.0-5.0% silicon content of C87600 produces fine surface detail reproduction and a smooth, defect-free as-cast surface. Ideal for precision marine and electrical hardware, art castings, architectural hardware with complex geometry, and components requiring minimal post-casting machining.

Applications: Precision marine cleats and fairleads, architectural hardware, art castings, food-grade fittings, precision electrical connectors.

C87600 Silicon Bronze Green Sand Casting

C87600 Silicon Bronze Green Sand Casting offers the fastest turnaround and lowest tooling cost for C87600 components. Clay-bonded green sand moulds are prepared rapidly for production of medium-weight standard hardware shapes. Tolerances CT8-CT10, surface finish Ra 12.5-25 um. Best suited for high-volume standard hardware shapes and blanks that will undergo subsequent CNC machining to final dimensions.

Applications: High-volume hardware blanks, clamp bodies, flange blanks, connector bodies for subsequent CNC machining.

C87600 Silicon Bronze Permanent Mold Casting

C87600 Silicon Bronze Permanent Mold Casting uses reusable steel dies preheated to 200-250 deg C for high-volume production. The permanent mould’s rapid chilling effect produces a finer grain size and higher mechanical properties than sand casting, with tolerances CT5-CT7 and excellent shot-to-shot dimensional consistency. Ideal for medium-complexity components in quantities of 500-50,000 pieces. The higher silicon content of C87600 vs C87300 gives improved corrosion performance in permanent mold components for marine service.

Applications: Fastener blanks, standard marine fittings, electrical connector bodies, cable gland bodies, standard conduit fittings.

International Equivalents of C87600 Silicon Bronze

Applications of C87600 / CC211A Silicon Bronze Castings

• Marine Engineering: Deck hardware, cleats, fairleads, through-hull fittings, propeller shaft bushings, seacock bodies. C87600 is the standard marine silicon bronze in European markets (CC211A designation).
• Electrical and Chemical Plant: Earthing clamps in ammonia, H2S, and acid environments. Cable gland bodies for offshore and chemical plant. Conduit fittings in corrosive process areas.
• Architectural Hardware: Door hardware, window fittings, handrail brackets, heritage restoration castings with stable golden-brown natural patina.
• Fine Art and Sculpture: Art castings, memorial plaques, architectural ornaments. C87600 produces excellent surface detail in investment casting.
• Cryogenic Service: Valve bodies for liquid nitrogen, liquid oxygen, and LNG service (operating range -200 to +200 deg C).
• Hydraulic Systems: Valve bodies, pump components, and hydraulic fittings for chemical plant and marine service.

Quality Standards for C87600 / CC211A Silicon Bronze

• ASTM B198 – Copper-Silicon Alloy Sand Castings
• BS EN 1982 – Copper and Copper Alloys Ingots and Castings (CC211A)
• IS 318 – Indian Standard for Copper Alloy Ingots and Castings (Gr.SiB2)
• DIN 1705 – Copper-Silicon Casting Alloys (CuSi3)
• AWS A5.7 ERCuSi-A – Silicon Bronze Welding Wire
• ISO 9001:2015 Quality Management System
• EN 10204 3.1 Mill Certificates (spectrometric analysis)
• RoHS 3 and REACH compliant

Request a Quote for C87600 / CC211A Silicon Bronze Castings

Electrical Accessories India supplies C87600 and CC211A silicon bronze castings to customers in the USA, UK, Germany, Australia, UAE, and Singapore. Quotations within 24 hours. Provide your drawing (PDF/DXF/STEP), required grade (C87600/CC211A/IS 318 Gr.SiB2/DIN CuSi3), quantity, casting process, and delivery requirements. Prototype to production supply with full EN 10204 3.1 mill certificates. Indicative pricing: USD 13.90 per kg CIF US Port.