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Product Details
C87200 Silicon Brass Casting
C87200 Silicon Brass Casting
C87200 Silicon Brass Casting
C87200 (UNS C87200, Silicon Brass) is a high-copper silicon brass casting alloy containing 87–91% copper, 12–16% zinc, and 0.8–2.0% silicon. The silicon addition dramatically increases tensile strength (380–450 MPa), improves fluidity for casting complex thin-wall shapes, and eliminates the need for lead as a machinability additive – making C87200 an important lead-free brass casting option for potable water and green-engineering applications.
Alloy Overview
C87200’s silicon content (0.8–2.0%) raises strength through solid solution hardening of the alpha matrix and dramatically improves casting fluidity, enabling thin-wall sections of 2–3 mm by gravity die or investment casting. The silicon also forms a tenacious SiO₂ surface film that enhances corrosion resistance in acids and industrial atmospheres. Lead-free (Pb max 0.09%), C87200 complies with NSF/ANSI 61, California AB1953, and EU Drinking Water Directive for potable water contact applications.
Material Composition
| Element | Min % | Max % | Typical % | Role |
|---|---|---|---|---|
| Copper (Cu) | 87.0 | 91.0 | 89.5 | Primary matrix, corrosion resistance |
| Zinc (Zn) | 12.0 | 16.0 | 13.5 | Castability, strength |
| Silicon (Si) | 0.80 | 2.0 | 1.4 | Strength, fluidity, corrosion resistance |
| Lead (Pb) | – | 0.09 | – | Lead-free grade |
| Iron (Fe) | – | 0.20 | 0.10 | Impurity |
| Aluminium (Al) | – | 0.005 | – | Impurity |
| Nickel (Ni) | – | 0.20 | – | Minor |
| Tin (Sn) | – | 0.20 | – | Minor |
| Manganese (Mn) | – | 0.10 | – | Impurity |
| Phosphorus (P) | – | 0.05 | – | Deoxidant |
Mechanical Properties
| Property | Sand Cast | Die Cast | Standard |
|---|---|---|---|
| Tensile Strength (MPa) | 380 min | 450 min | ASTM B584/EN 1982 |
| Yield Strength (MPa) | 160 | 200 | ASTM E8 |
| Elongation (%) | 20 | 22 | ASTM E8 |
| Hardness (HB) | 80–110 | ASTM E10 | |
| Density (g/cm³) | 8.61 | – | |
| Electrical Conductivity (%IACS) | 7–9 | – | |
| Melting Range (°C) | 860–1000 | – | |
| Machinability (%) | 40–50 | CDA scale | |
International Equivalent Grades
| Standard | Designation | Name |
|---|---|---|
| USA (UNS/ASTM B584) | C87200 / CDA 872 | Silicon Brass Casting |
| Europe (EN 1982) | CC212A | CuZn15Si4-C |
| Germany (DIN 1709) | CuZn14Si3-C | Siliziumguss |
| India (IS 318) | HTB3 | Aluminium Brass Grade 3 (nearest) |
| Japan (JIS H5111) | – | – |
| ISO | CuZn14Si3-C | Silicon Brass Casting |
| UK (BS 1400) | – | Silicon Brass Casting |
Applications
C87200 castings: lead-free potable water valve and fitting bodies; NSF/ANSI 61 compliant pressure fittings; industrial pump housings and impellers in acid environments; marine deck hardware requiring lead-free compliance; precision thin-wall investment castings for instruments and hydraulic components; architectural hardware for green building certification programs; and electrical housings where lead-free RoHS+ compliance is required.
Pricing
US$ 11.50 per kilogram (CIF, indicative). MOQ: sample 1 pc; production 50 pcs.
Quality
ASTM B584 (C87200); EN 1982 CC212A; NSF/ANSI 61 compatible; California AB1953 / Prop 65 lead-free compliant; ISO 9001:2015. ISO 9001:2015. EN 10204 3.1 MTR.
Related Grades
- C85700 Yellow Brass Casting
- C46400 Naval Brass Casting
- C83600 LG2 Red Brass Casting
- Brass Castings – All Grades
Request a Quote
Price: US$ 11.50/kg. Email: info@elecaccs.com | www.elecaccs.com
