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CW508L
CW508L
CW508L (chemical designation CuZn37, historically referenced under British Standard BS 2874 CZ107/CZ108 or German DIN W.Nr. 2.0321) is the premier European single-phase (α) wrought brass defined under EN standards including EN 12164 (rods), EN 12165 (forgings), EN 1652 (plate/strip), and EN 12449 (tubes). Formulated with 62.0% to 64.0% copper and a zinc balance with a tightly restricted maximum lead content of 0.10%, CW508L is widely recognized as the classic "cartridge brass" equivalent in Europe. CW508L maintains a homogeneous face-centered cubic alpha crystal structure that offers exceptional cold-forming ductility, allowing it to withstand severe multi-stage deep drawing, spinning, and bending.
Chemical Composition
Elements | Min (%) | Max (%) |
Cu | 62.00 | 64.00 |
Pb | – | 0.10 |
Fe | – | 0.10 |
Sn | – | 0.10 |
Ni | – | 0.30 |
Al | – | 0.05 |
Total Others | – | 0.10 |
Zn | Remainder | |
Mechanical Properties According To EN 12165 (As Per Temper H070)
Range (mm) |
From |
To |
UTS Min |
PS Min |
Elongation Min |
Hardness Min (HB) |
Hardness Max (HB) |
| Round (Dia) | 8 |
75 |
– |
– |
– |
70 |
170 |
| Hex (A/F) | 8 |
70 |
– |
– |
– |
70 |
170 |
| Square (A/F) | 8 |
60 |
– |
– |
– |
70 |
170 |
PHYSICAL PROPERTIES |
|
| Melting Point – Liquidus°F | 1680 |
| Density lb/cu in. at 68°F | 0.305 |
| Specific Gravity | 8.44 |
| Electrical Conductivity % IACS at 68°F | 27.6 |
| Thermal Conductivity Btu/ sq ft/ ft hr/ °F at 68°F | 67 |
| Coefficient of Thermal Expansion 68-57210⁻⁶ per °F (68 – 572°F) | 11.4 |
| Specific Heat Capacity Btu/ lb /°F at 68°F | 0.09 |
| Modulus of Elasticity in Tension ksi | 15000 |
| Modulus of Rigidity ksi | 5600 |
FABRICATION PROPERTIES |
|
| Technique | Suitability |
| Soldering | Excellent |
| Brazing | Excellent |
| Oxyacetylene Welding | Good |
| Gas Shielded Arc Welding | Fair |
| Coated Metal Arc Welding | Not Recommended |
| Spot Weld | Good |
| Seam Weld | Not Recommended |
| Butt Weld | Good |
| Capacity for Being Cold Worked | Excellent |
| Capacity for Being Hot Formed | Fair |
| Machinability Rating | 35 |
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