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CW507L
CW507L
CW507L (chemical designation CuZn36, historically referenced under British Standard BS 2874 CZ108 or German DIN W.Nr. 2.0332) is a versatile, single-phase (α) wrought brass defined under European standards including EN 12164 (rods for free machining), EN 12165 (forging stock), and EN 1652 (plate, sheet, strip, and circles). Formulated with 63.0% to 65.0% copper and a zinc balance with a tightly restricted maximum lead content of 0.10%, CW507L is engineered for severe cold-forming, deep drawing, and bending operations. Sitting near the transition boundary between single-phase alpha and dual-phase duplex structures, CW507L balances high cold plasticity with increased tensile strength and rigidity, making it an essential alloy for architectural stampings, electrical connectors, and formed industrial components.
Chemical Composition
Elements | Min (%) | Max (%) |
Cu | 63.50 | 65.50 |
Pb | – | 0.05 |
Fe | – | 0.05 |
Sn | – | 0.10 |
Al | – | 0.02 |
Ni | – | 0.30 |
Total Others | – | 0.10 |
Zn | Remainder | |
Mechanical Properties According To EN 12163 (As Per Temper R350)
Range |
From |
To |
UTS Min (MPa) |
UTS Max (MPa) |
PS Min (MPa) |
Elongation Min (%) |
Hardness Min |
Hardness Max |
| Round (Dia) | 1.5 |
75 |
350 |
440 |
170 |
28 |
– |
– |
| Hex (A/F) | 3 |
70 |
350 |
440 |
170 |
28 |
– |
– |
| Square (A/F) | 3 |
60 |
350 |
440 |
170 |
28 |
– |
– |
| Rectangle (Thickness) | 3 |
50 |
350 |
440 |
170 |
28 |
– |
– |
PHYSICAL PROPERTIES |
|
| Melting Point – Liquidus°F | 1710 |
| Melting Point – Solidus°F | 1660 |
| Density lb/cu in. at 68°F | 0.306 |
| Specific Gravity | 8.47 |
| Electrical Conductivity % IACS at 68°F | 27 |
| Thermal Conductivity Btu/ sq ft/ ft hr/ °F at 68°F | 67 |
| Coefficient of Thermal Expansion 68-57210⁻⁶ per °F (68 – 572°F) | 11.3 |
| 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 | Poor |
| Machinability Rating | 30 |
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