| Alloy Name | |||||||||||||||||
| BS CZ107 | ASTM | JIS | KMW | ||||||||||||||
| CuZn33 | C26800 | C2680 | CuZn33 | ||||||||||||||
| Chemical Composition | (% By Weight) |
| Cu | 64.00-67.00% |
| Pb | 0.10% Max |
| Fe | 0.10% Max |
| Zn | Reminder % |
| Other Impurity | 0.40% |
| Main Applications | |
| Electrical | Socket Shells, Flashlight Shells, Lamp Fixture, Reflectors, Screw Shells. |
| Fasteners | Pins, Rivets, Grommets, Eyelets, Screws. |
| Industrail | Springs, chain, Bead Chain. |
| Automotive | Radiator Cores, Tanks |
| Physical Properties Typical values in annealed temper at 20°C | ||
| Density | 8.33 | g/cm3 |
| Thermal expansion coefficient −191 .. 16 | 17.0 | 10-6/K |
| Specific heat capacity - 0 .. 300°C | 20.2 | 10-6/K |
| Thermal conductivity | 0.377 | J/(g.K) |
| Electrical conductivity (1 MS/m = 1m/(0 mm2)) | 121 | W/(m.k) |
| Electrical conductivity (IACS) | 14 | MS/m% |
| Thermal coefficient of electrical resistance (0 .. 200 C) | 1.7 | 10-3/K |
| Modulus of elasticity (1GPa = 1 kN/mm2) cold formed | 99....115 | GPA |
| Mechanical Properties (EN 1652) | ||||
| Temper | Tensile Strength Rm MPa (N/mm2) |
Yield Strength Rp0.2 MPa (N/mm2) |
Elongation Minimum A50mm % | Hardness HV |
| O (SOFT) | 280 Min | 180 | 45 Min | 80 Max |
| HA (quarter Hard) | 340 Min | 180 | 35 Min | 75 Min |
| HB (Half Hard) | 385 Min | 300 | 20 Min | 110 Min |
| HD (Hard) | 460 Min | 350 | 5 Min | 135 Min |
| HE (extra Hard) | 525 Min | 450 | 165 Min | |
Cold formability
Hot formability
Soldering
Brazing
Oxyacetylene welding
Gas shielded arc welding
Machinability
Excellent
Not Recommended
Excellent
Excellent
Good
Fair
Fair