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CW510L
CW510L
CW510L (chemical designation CuZn42, historically referenced under German standard DIN W.Nr. 2.0380 or cross-referenced with American UNS C28500) is a high-zinc, duplex (α + β) structural brass defined under European standards including EN 12164 (rods for free machining), EN 12165 (forging stock), and EN 12167 (profiles). Formulated with 57.0% to 59.0% copper and a zinc balance with a tightly restricted maximum lead content of $0.20\%$, CW510L is engineered as an eco-compliant, high-performance structural alloy. Because its zinc content sits near 41% - 43%, CW510L features a high proportion of the harder, more rigid beta (β) phase at room temperature. This duplex structure delivers high tensile strength, stiffness, and exceptional hot-working plasticity, making it the premier European standard alloy for closed-die forgings, hot-stamped plumbing fittings, and structural fasteners.
Chemical Composition
Elements |
Min (%) |
Max (%) |
Cu |
57.00 |
59.00 |
Pb |
– |
0.20 |
Fe |
– |
0.30 |
Sn |
– |
0.30 |
Ni |
– |
0.30 |
Al |
– |
0.05 |
Total Others |
– |
0.20 |
Zn |
Remainder |
|
Mechanical Properties According To EN 12164 CW510L (As Per Temper 430)
Range (mm) |
From |
To |
UTS Min (N/mm²) |
PS Min (N/mm²) |
Elongation Min (%) |
Hardness Min |
Hardness Max |
| Round (Dia) | 2 |
40 |
430 |
220 |
10 |
– |
– |
| Hex (A/F) | 2 |
35 |
430 |
220 |
10 |
– |
– |
| Square (A/F) | 2 |
35 |
430 |
220 |
10 |
– |
– |
PHYSICAL PROPERTIES |
|
| Electrical conductivity %IACS | 31 |
| Thermal conductivity W/(m·K) | 139 |
| Thermal expansion coefficient (0–300 °C) | 10-6 /K 21.70 |
| Density | 8.41 g/cm3 |
| Modulus of elasticity | 107 Gpa |
FABRICATION PROPERTIES |
|
| Machinability (CuZn39Pb3 = 100 %) | 60% |
| Capacity for being cold worked | poor |
| Capacity for being hot worked | Excellent |
| Resistance welding (butt weld) | Fair |
| Inert gas shielded arc welding | Fair |
| Gas welding | Fair |
| Hard soldering | Excellent |
| Soft soldering | Excellent |
| Melting range | 870–900 °C |
| 650–750 °C | 650–750 °C |
| 450–550 °C | 450–550 °C |
| Thermal stress relieving (1–3 h) | 250–350 °C |
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