CuSn7Zn4Pb7-C (CC493K) vs Cu-ETP: 0% composition overlap. Significantly different materials serving different application areas.
CuSn7Zn4Pb7-C (CC493K) vs Cu-ETP
Side-by-side chemical composition and mechanical property comparison.
Overview
CuSn7Zn4Pb7-C (CC493K)
2.1090
The world's most common bearing bronze (Rg7). Higher tin (7%) and lead (7%) content than Rg5 provides superior bearing properties, better wear resistance, and improved self-lubrication under boundary lubrication. Good sliding properties even for occasional dry running during acceleration. Standard material per DIN 1850/ISO 4379 for plain bearings. Used for medium-load sliding bearings, bushings, guide bushings, valve seats, and worm gear nuts in general engineering, textile machinery, and agricultural equipment. ASTM: C93200.
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.
| CuSn7Zn4Pb7-C (CC493K) | Cu-ETP | |
|---|---|---|
| Material Number | 2.1090 | CW004A |
| Category | Copper & Brass | Copper & Brass |
| Standard | EN 1982 | EN 13601 |
Chemical composition (wt%)
| Element | CuSn7Zn4Pb7-C (CC493K) | Cu-ETP | Overlap |
|---|---|---|---|
| Si | ≤ 0.01% | — | — |
| P | ≤ 0.1% | — | — |
| Ni | ≤ 2% | — | — |
| Cu | 81–85% | ≥ 99.9% | No overlap |
Mechanical properties
| Property | CuSn7Zn4Pb7-C (CC493K) | Cu-ETP | Unit |
|---|---|---|---|
| tensile_strength | 230–270 | 200–260 | MPa |
| yield_strength | 110–130 | 40–80 | MPa |
| elongation | 7–14 | ≥ 33 | % |
Compatibility Assessment
CuSn7Zn4Pb7-C (CC493K) and Cu-ETP 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 CuSn7Zn4Pb7-C (CC493K) the same as Cu-ETP?
CuSn7Zn4Pb7-C (CC493K) and Cu-ETP have a 0% composition overlap. They are generally not directly interchangeable.
Can I replace CuSn7Zn4Pb7-C (CC493K) with Cu-ETP?
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 CuSn7Zn4Pb7-C (CC493K) and Cu-ETP?
The main differences are in the following elements: Cu, Pb. CuSn7Zn4Pb7-C (CC493K) is a Copper & Brass grade, while Cu-ETP 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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