CuZn28 vs CuZn39Pb3: 33% composition overlap. Significantly different materials serving different application areas.
CuZn28 vs CuZn39Pb3
Side-by-side chemical composition and mechanical property comparison.
Overview
CuZn28
CW505L
Single-phase alpha brass — Cu 72%, Zn 28%. Excellent cold formability (deep drawing, spinning, bending). Better corrosion resistance than higher-Zn brasses (CuZn37, CuZn40). Used for cartridge cases (hence "cartridge brass"), musical instruments, lamp fittings, radiator cores, and decorative hardware. Good dezincification resistance.
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.
| CuZn28 | CuZn39Pb3 | |
|---|---|---|
| Material Number | CW505L | 2.0401 |
| Category | Copper & Brass | Copper & Brass |
| Standard | EN 1652 | EN 12164 |
Chemical composition (wt%) — Pro
| Element | CuZn28 | CuZn39Pb3 | Overlap |
|---|---|---|---|
| Ni | — | 0–0.3% | — |
| Cu | 71–73% | 57–59% | No overlap |
| Al | — | 0–0.05% | — |
| Zn | — | — | — |
| Pb | |||
| Fe | |||
| Sn |
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Sign up free — 3 comparisons/day freeMechanical properties — Pro
| Property | CuZn28 | CuZn39Pb3 | Unit |
|---|---|---|---|
| Tensile Strength | 300–380 | ≥ 360 | MPa |
| Yield Strength | 90–150 | ≥ 150 | MPa |
| Elongation | 40–55 | ≥ 15 | % |
| Elastic Modulus | |||
| Density | |||
| hardness_hv | |||
| Tensile Strength | |||
| Yield Strength Rp0.2 | |||
| Elongation A | |||
| Density | |||
| Machinability Rating |
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Sign up free — 3 comparisons/day freeCompatibility Assessment
CuZn28 and CuZn39Pb3 have significantly different compositions (33% overlap). These materials are not interchangeable and serve different application areas.
Automated assessment based on composition analysis
Frequently Asked Questions
Is CuZn28 the same as CuZn39Pb3?
CuZn28 and CuZn39Pb3 have a 33% composition overlap. They are generally not directly interchangeable.
Can I replace CuZn28 with CuZn39Pb3?
Generally not recommended. The compositions differ significantly (33% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between CuZn28 and CuZn39Pb3?
The main differences are in the following elements: Cu, Pb. CuZn28 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.
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.