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CW511L
CW511L
CW511L (chemical designation CuZn38As, historically referenced under British Standard BS 2874 CZ112 or German DIN W.Nr. 2.0272) is a high-zinc, duplex (α + β) brass engineered specifically for dezincification resistance (DZR). Defined under European standards including EN 12164 (rods for free machining), EN 12165 (forging stock), and EN 12167 (profiles), CW511L is formulated with 60.0% to 62.0% copper, a zinc balance, a tightly controlled maximum lead content of 0.20%, and a critical trace addition of Arsenic (0.02% - 0.15%).
Chemical Composition
Elements | Min (%) | Max (%) |
Cu | 61.50 | 63.50 |
Pb | – | 0.20 |
Fe | – | 0.10 |
Sn | – | 0.10 |
Ni | – | 0.30 |
Al | – | 0.05 |
As | 0.02 | 0.15 |
Total Others | – | 0.20 |
Zn | Remainder | |
Mechanical Properties According To EN12164 CW511L (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 |
60 |
320 |
200 |
20 |
– |
– |
| Hex (A/F) | 5 |
50 |
320 |
200 |
20 |
– |
– |
| Square (A/F) | 5 |
50 |
320 |
200 |
20 |
– |
– |
PHYSICAL PROPERTIES |
|
| Product Property | Metric |
| Coefficient of Thermal Expansion | 21.7 10 -6 (20-300 C) |
| Density | 8.41 gm/cm3 @ 20 C |
| Electrical Conductivity | 0.164 MegaSiemens/cm @ 20 C |
| Electrical Resistivity | 6.15 microhm-cm @ 20 C |
| Melting Point Liquid US | 904 C |
| Melting Point Solid US | 899 C |
| Modulas of Elasticity in Tension | 103400 MPa |
| Modulas of Rigidity | 38610 MPa |
| Specific Gravity | 8.39 |
FABRICATION PROPERTIES |
|
| Joining Technique | Suitability |
| Brazing | Excellent |
| Butt Weld | Good |
| Capacity for Being Cold Worked | Fair |
| Capacity for Being Hot Formed | Excellent |
| Coated Metal Arc Welding | Not Recommended |
| Forgeability Rating | 90 |
| Gas Sheilded Arc Welding | Fair |
| Machinability rating | 40 |
| Oxyacetylene Welding | Good |
| Seam Weld | Not Recommended |
| Soldering | Excellent |
| Spot Weld | Good |
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