CuSn5Zn5Pb5-C (CC491K) vs CuZn39Pb3: 19% composition overlap. Significantly different materials serving different application areas.
CuSn5Zn5Pb5-C (CC491K) vs CuZn39Pb3
Side-by-side chemical composition and mechanical property comparison.
Overview
CuSn5Zn5Pb5-C (CC491K)
2.1096
Classic leaded gunmetal (Rotguss Rg5) — the universal copper casting alloy for bearings and fittings. 5% Sn + 5% Zn + 5% Pb provides good machinability, moderate strength, excellent corrosion resistance in fresh and sea water, and self-lubricating properties from lead phase. Used for plain bearings under low/medium loads, valve bodies, pump housings, pipe fittings, and general marine hardware. The economic workhorse of the bronze foundry. ASTM: C83600 (SAE 40), BS: LG2.
CuZn39Pb3
2.0401
The most widely used free-cutting brass (machinability index 100%). Excellent for high-speed automatic lathe work. Used for turned parts, faucets, valves, fittings, screws, nuts, electrical connectors, and watch components. Also known as MS58.
| CuSn5Zn5Pb5-C (CC491K) | CuZn39Pb3 | |
|---|---|---|
| Material Number | 2.1096 | 2.0401 |
| Category | Copper & Brass | Copper & Brass |
| Standard | EN 1982 | EN 12164 |
Chemical composition (wt%)
| Element | CuSn5Zn5Pb5-C (CC491K) | CuZn39Pb3 | Overlap |
|---|---|---|---|
| Si | ≤ 0.01% | — | — |
| P | ≤ 0.1% | — | — |
| Ni | ≤ 2% | 0–0.3% | OK |
| Cu | 83–87% | 57–59% | No overlap |
Mechanical properties
| Property | CuSn5Zn5Pb5-C (CC491K) | CuZn39Pb3 | Unit |
|---|---|---|---|
| tensile_strength | 200–250 | ≥ 360 | MPa |
| yield_strength | 90–110 | ≥ 150 | MPa |
| elongation | 6–13 | ≥ 15 | % |
Compatibility Assessment
CuSn5Zn5Pb5-C (CC491K) and CuZn39Pb3 have significantly different compositions (19% overlap). These materials are not interchangeable and serve different application areas.
Automated assessment based on composition analysis
Frequently Asked Questions
Is CuSn5Zn5Pb5-C (CC491K) the same as CuZn39Pb3?
CuSn5Zn5Pb5-C (CC491K) and CuZn39Pb3 have a 19% composition overlap. They are generally not directly interchangeable.
Can I replace CuSn5Zn5Pb5-C (CC491K) with CuZn39Pb3?
Generally not recommended. The compositions differ significantly (19% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between CuSn5Zn5Pb5-C (CC491K) and CuZn39Pb3?
The main differences are in the following elements: Cu, Sn, Pb. CuSn5Zn5Pb5-C (CC491K) is a Copper & Brass grade, while CuZn39Pb3 is a Copper & Brass grade.
Related Comparisons
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Data provided for reference only. Always verify against the applicable specification for critical applications.
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