CuZn39Pb3
2.0401The 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.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | ASTM | USA | C38500 | C38500 | REF |
| 🇺🇸 | UNS | USA | C38500 | C38500 | REF |
| 🇪🇺 | EN | Europe | CuZn39Pb3 / CW614N | 2.0401 | 100% |
| 🇪🇺 | DIN | Europe | MS58 (old) | — | 98% |
| 🇯🇵 | JIS | Japan | C3604 | — | 93% |
| 🇷🇺 | GOST | Russia | LS58-3 | — | 90% |
Sources: ASTM B16, EN 12164, DIN 17660, JIS H3250, GOST 15527
Chemical composition comparison (wt%)
Side-by-side: CuZn39Pb3 (EN) (EN 12164) vs MS58 (old) (DIN)
| Element | CuZn39Pb3 (EN) | MS58 (old) (DIN) | Overlap |
|---|---|---|---|
| Ni | 0–0.3% | — | — |
| Cu | 57–59% | — | — |
| Al | 0–0.05% | — | — |
| Pb | 2.5–3.5% | — | — |
| Fe | 0–0.3% | — | — |
| Sn | 0–0.3% | — | — |
| Zn | — | — | — |
Mechanical properties
Drawn
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | ≥ 360 | MPa |
| Yield Strength | ≥ 150 | MPa |
| Elongation | ≥ 15 | % |
| hardness_hv | ≥ 90 | HV |
| Elastic Modulus | ≥ 97 | GPa |
| Density | ≥ 8.47 | g/cm3 |
As Drawn R430
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | ≥ 430 | MPa |
| Yield Strength Rp0.2 | ≥ 220 | MPa |
| Elongation A | ≥ 8 | % |
Soft R360
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | ≥ 360 | MPa |
| Elongation A | ≥ 20 | % |
General
| Property | Value | Unit |
|---|---|---|
| Density | 8.47 | g/cm³ |
| Machinability Rating | 100 | % |
Compatibility verdict
CuZn39Pb3 and MS58 (old): 98% composition match
Close equivalents but NOT identical.
Related materials
CuZn37
2.0321Lead-free alpha/alpha+beta brass (63% Cu, 37% Zn). Compromise between cold formability (CuZn35) and hot formability (CuZn40). The most widely used unleaded brass. Used for cartridge cases, radiator cores, lamp components, plumbing fixtures, and decorative hardware.
CuZn36Pb3
CW603NFree-cutting leaded brass — the benchmark for non-ferrous machinability (rated 100%). Lead particles act as chip breakers for excellent surface finish. Used for screw machine parts, fittings, valves, watch components, precision mechanics, and electrical connectors. Old DIN number 2.0375.
CuSn6
CW452KPhosphor bronze with 6% tin — better cold formability than CuSn8 at slightly lower strength. Excellent spring properties and fatigue resistance. Used for electrical connectors, spring contacts, switch parts, bellows, bourdon tubes, and precision springs.
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