Cu-ETP vs CuZn39Pb3: 0% composition overlap. Significantly different materials serving different application areas.
Cu-ETP vs CuZn39Pb3
Side-by-side chemical composition and mechanical property comparison.
Overview
Cu-ETP
CW004A
Electrolytic Tough Pitch copper — the most widely used copper grade worldwide. 99.90% Cu min with controlled oxygen content (~0.02-0.04%). Electrical conductivity ≥100% IACS. Used for busbars, motor windings, transformer coils, electrical conductors, roofing, and radiators. Caution: hydrogen embrittlement risk in reducing atmospheres above 370°C.
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.
| Cu-ETP | CuZn39Pb3 | |
|---|---|---|
| Material Number | CW004A | 2.0401 |
| Category | Copper & Brass | Copper & Brass |
| Standard | EN 13601 | EN 12164 |
Chemical composition (wt%)
| Element | Cu-ETP | CuZn39Pb3 | Overlap |
|---|---|---|---|
| Ni | — | 0–0.3% | — |
| Cu | ≥ 99.9% | 57–59% | No overlap |
| Al | — | 0–0.05% | — |
| O | 0–0.04% | — | — |
Mechanical properties
| Property | Cu-ETP | CuZn39Pb3 | Unit |
|---|---|---|---|
| tensile_strength | 200–260 | ≥ 360 | MPa |
| yield_strength | 40–80 | ≥ 150 | MPa |
| elongation | ≥ 33 | ≥ 15 | % |
Compatibility Assessment
Cu-ETP and CuZn39Pb3 have significantly different compositions (0% overlap). These materials are not interchangeable and serve different application areas.
Automated assessment based on composition analysis
Frequently Asked Questions
Is Cu-ETP the same as CuZn39Pb3?
Cu-ETP and CuZn39Pb3 have a 0% composition overlap. They are generally not directly interchangeable.
Can I replace Cu-ETP with CuZn39Pb3?
Generally not recommended. The compositions differ significantly (0% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between Cu-ETP and CuZn39Pb3?
The main differences are in the following elements: Cu, Pb. Cu-ETP 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.