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C89550 Bismuth Brass Casting
C89550 Bismuth Brass Casting – Lead-Free Eco Brass
C89550 Bismuth Brass Casting – Lead-Free Eco Brass
C89550 (UNS C89550, Bismuth Brass, Eco Brass) is a lead-free brass casting alloy where bismuth (0.5–1.5%) replaces lead as the machinability-enhancing agent. Bismuth performs the same chip-breaking function as lead in the microstructure – dispersing as fine particles that produce short, broken chips during machining – while being classified as non-toxic and non-restricted under RoHS, NSF/ANSI 61, California AB1953, and EU Drinking Water Directive. C89550 is the premium lead-free alternative for high-volume machined castings requiring production economics comparable to traditional leaded brass.
Alloy Overview
C89550’s bismuth content (0.5–1.5%) produces machinability of 70–80% CDA – substantially higher than silicon brass (40–50%) and approaching the 80–90% of traditional leaded yellow brass. This makes C89550 the preferred eco-brass grade for CNC-machined valve bodies, fittings, and precision hardware components where the machining productivity must not be significantly compromised by the lead-free transition. The alloy complies with all major lead-free water contact regulations globally.
Material Composition
| Element | Min % | Max % | Typical % | Role |
|---|---|---|---|---|
| Copper (Cu) | 86.0 | 90.0 | 88.0 | Primary matrix, corrosion resistance |
| Zinc (Zn) | 3.0 | 7.0 | 5.0 | Strength, castability |
| Bismuth (Bi) | 0.50 | 1.50 | 1.0 | Lead-free machinability agent |
| Tin (Sn) | 1.0 | 3.0 | 2.0 | Corrosion resistance, pressure tightness |
| Lead (Pb) | – | 0.09 | – | Lead-free grade |
| Iron (Fe) | – | 0.20 | 0.08 | Impurity |
| Nickel (Ni) | – | 1.0 | 0.3 | Minor toughness |
| Aluminium (Al) | – | 0.005 | – | Impurity |
| Silicon (Si) | – | 0.005 | – | Impurity |
| Phosphorus (P) | – | 0.05 | – | Deoxidant |
Mechanical Properties
| Property | Sand Cast | Die Cast | Standard |
|---|---|---|---|
| Tensile Strength (MPa) | 300 min | 330 min | ASTM B584/EN 1982 |
| Yield Strength (MPa) | 110 | 130 | ASTM E8 |
| Elongation (%) | 20 | 22 | ASTM E8 |
| Hardness (HB) | 60–85 | ASTM E10 | |
| Density (g/cm³) | 8.80 | – | |
| Electrical Conductivity (%IACS) | 14–17 | – | |
| Melting Range (°C) | 850–980 | – | |
| Machinability (%) | 70–80 | CDA scale | |
International Equivalent Grades
| Standard | Designation | Name |
|---|---|---|
| USA (UNS/ASTM B584) | C89550 / CDA 895 | Bismuth Brass / Eco Brass |
| Europe (EN 1982) | CC491K-Bi (nearest) | CuSn5Pb(Bi)Zn5-C |
| Germany (DIN) | CuSn5Bi2Zn5-C | Wismutbronze (Bismuth Bronze) |
| India (IS 318) | – | Lead-Free Bismuth Brass |
| Japan (JIS) | – | Eco Brass Casting |
| ISO | CuSn5BiZn5-C (nearest) | Bismuth Brass Lead-Free Casting |
| UK (BS) | – | Lead-Free Eco Brass Casting |
Applications
C89550 bismuth brass castings replace C83600 LG2 and C84400 in: lead-free potable water valves and pressure fittings (NSF/ANSI 61, WRAS, DVGW compliant); California AB1953 compliant plumbing fittings; EU Drinking Water Directive compliant fittings for European markets; food and beverage processing equipment fittings; medical gas and laboratory plumbing fittings; and any application where the machinability of traditional leaded brass is critical but lead regulations prohibit its use.
Pricing
US$ 11.50 per kilogram (CIF, indicative). MOQ: sample 1 pc; production 50 pcs.
Quality
ASTM B584 (C89550); NSF/ANSI 61 certified lead-free; WRAS compatible; California AB1953 / Prop 65 compliant; EU DWD 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
