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%) — Pro
| 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 |
| Al | |||
| Sn | |||
| Zn | |||
| Pb | |||
| Fe |
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Sign up free — 3 comparisons/day freeMechanical properties — Pro
| Property | CuSn5Zn5Pb5-C (CC491K) | CuZn39Pb3 | Unit |
|---|---|---|---|
| Tensile Strength | 200–250 | ≥ 360 | MPa |
| Yield Strength | 90–110 | ≥ 150 | MPa |
| Elongation | 6–13 | ≥ 15 | % |
| Hardness HB | |||
| Density | |||
| hardness_hv | |||
| Elastic Modulus | |||
| Tensile Strength | |||
| Yield Strength Rp0.2 | |||
| Elongation A | |||
| Density | |||
| Machinability Rating |
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Sign up free — 3 comparisons/day freeCompatibility 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.
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Data provided for reference only. Always verify against the applicable specification for critical applications.
All data is for reference only. Equivalents indicate similarity, not identity. Always verify against the applicable specification for safety-critical applications. materialref.com accepts no liability for decisions based on this data.