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C89520 Lead Free Brass Casting
C89520 Lead Free Brass Casting
C89520 Lead Free Brass Casting
C89520 lead free brass casting is a bismuth-selenium (Bi-Se) brass alloy that achieves the highest machinability of any lead-free casting alloy at 80–85% relative to C36000, while maintaining lead content below 0.05% — fully compliant with NSF/ANSI 372, US SDWA 2014, RoHS 2011/65/EU, and EU Drinking Water Directive 2020/2184/EU. Also known as BiLead™ brass, C89520 is the closest available substitute to C83600 leaded bronze for precision-machined castings including valve seats, meter bodies, instrument housings, cable gland bodies, and high-volume turned components. Electrical Accessories India supplies C89520 sand castings, investment castings, and CNC-machined parts from Jamnagar, India, to customers in USA, UK, EU, and 30+ countries.
C89520 Alloy Composition and Technical Properties
C89520 uses bismuth (1.0–2.5%) and selenium (0.05–0.15%) additions to replicate lead’s chip-breaking function during machining operations, producing short, brittle chips that prevent tool-wrap and surface finish degradation. Bismuth also partially fills interdendritic spaces during solidification, improving pressure tightness compared to silicon brass lead-free grades. The alloy achieves 80–85% machinability, 276–310 MPa tensile strength, and corrosion resistance equivalent to C83600 in most aqueous service environments.
| Property | Value |
|---|---|
| UNS Designation | C89520 |
| Trade Name | BiLead™ Brass, Bismuth Brass |
| Standard | ASTM B584 |
| Cu Content | 86–89% |
| Zn Content | 3–5% |
| Sn Content | 3–5% |
| Bi Content | 1.0–2.5% |
| Se Content | 0.05–0.15% |
| Pb Content | <0.05% (NSF/ANSI 372 compliant) |
| Tensile Strength | 276–310 MPa |
| Yield Strength | 140–170 MPa |
| Elongation | 18–22% |
| Hardness | 60–70 HB |
| Machinability | 80–85% (vs C36000 = 100%) – highest in lead-free range |
| Casting Process | Sand casting, investment casting, centrifugal casting |
| NSF/ANSI 372 | Compliant – <0.25% Pb weighted average |
| RoHS | Compliant – <0.1% Pb |
| Price (Indicative) | US$ 11.50/kg (FOB India) |
Applications of C89520 Lead-Free Castings
C89520 bismuth-selenium brass is specified for precision-machined lead-free components where machinability is the primary requirement: valve seats, disk seats, and valve trim for potable water ball valves and gate valves; water meter bodies and water meter chambers; instrument valve bodies for analytical and metering applications; cable gland bodies (M20–M63) for RoHS-compliant electrical installations; plumbing angle valves, compression fitting bodies, and push-fit connector bodies; and high-volume CNC-turned components where C83600 has historically been used but lead-free compliance is now required.
International Equivalents
| Designation System | Equivalent | Standard |
|---|---|---|
| UNS (USA) | C89520 | ASTM B584 |
| Trade Name | BiLead™, Eco Brass Bi-Se | Various producers |
| EU Comparable | CuSn5Zn5Pb0-Bi (lead-free gunmetal) | BS EN 17139:2020 |
| NSF/ANSI | Certified alloy system | NSF/ANSI 61, 372 |
Related Lead-Free Brass Casting Alloys
- C87850 Lead Free Brass Casting – Silicon Brass, NSF/ANSI 372
- C89833 Lead Free Brass Casting – Tin-Silicon Bronze, pressure tight
- CC499K Lead Free Brass Casting – EN 1982 European lead-free gunmetal
- CW511L Lead Free Brass Casting – EN 12420 European silicon brass
- Lead Free Brass Casting – All Alloys
