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CW602N
CW602N
CW602N (chemical designation CuZn36Pb2As) is the primary European standard dezincification-resistant (DZR) brass alloy defined under EN 12164 (rods for free machining), EN 12165 (forging stock), and EN 12420 (forgings). Engineered specifically for potable water and aggressive fluid installations, it features a controlled micro-addition of arsenic (0.02% - 0.15% As) combined with heat-treatment capability. This inhibits selective zinc leaching (dezincification) in acidic, chlorinated, or hot soft-water environments.
Chemical Composition
Elements | Min Value | Max Value |
Cu | 61.00 | 63.00 |
Pb | 1.70 | 2.80 |
Sn | – | 0.10 |
Fe | – | 0.10 |
As | 0.02 | 0.15 |
Al | – | 0.05 |
Mn | – | 0.10 |
Ni | – | 0.30 |
Total Others | – | 0.20 |
Zn | Remainder | |
Mechanical Properties According To EN 12164 (As Per Temper R320)
Range (mm) |
From |
To |
UTS Min (N/mm²) |
PS Min (N/mm²) |
Elongation Min (%) |
Hardness Min |
Hardness Max |
| Round (Dia) | 6 |
40 |
350 |
150 |
25 |
90 |
– |
| Hex (A/F) | 5 |
35 |
350 |
150 |
25 |
90 |
– |
| Square (A/F) | 5 |
35 |
350 |
150 |
25 |
90 |
– |
PHYSICAL PROPERTIES |
|
| Melting Point | 910°C |
| Density | 8.43 g/cm³ |
| Specific Heat | 377 |
| Thermal Conductivity (20°C) | 117 W/m°K |
| Thermal Expansion Coefficient (20-200°C) | 20.7 X 10-6 per °C |
| Electrical Conductivity | 26% IACS |
| Electrical Resistivity | 0.066 ohm mm²/m |
| Modulus of Elasticity | 106 KN/mm² |
FABRICATION PROPERTIES |
|
| Technique | Suitability |
| Hot Working Temperature Range | 800-850°C |
| Hot Formability | Very good |
| Cold Formability | Good |
| Machinability rating (free cutting brass = 100) | 75% |
| Annealing Temp. Range | 450-650°C |
| Stress Relieving Temperature | 250-350°C |
| Soldering | Excellent |
| Brazing | Good |
| Oxy-acetylene welding | Not recommended |
| Gas-shielded arc welding | Not recommended |
| Resistance welding | Not recommended |
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