Global Certificate
ISO 9001 : 2015
| Alloy Name | |
| AMW-24 | CuZn20 |
| IS | CuZn20 |
| ISO | CuZn20 |
| UNS | C24000 |
| JIS | C2400 |
CuZn20 has excellent cold forming, good hot forming properties and is well suited for e.g. coinage, beating, embossing. This alloy has a higher strength than pure copper. CuZn20 has good welding and brazing properties as well as a good corrosion resistance and is not fragile to stress corrosion and dezincification. It is principally used in jewelers, metal goods, watch industry and in electronic industry for installation part
| Chemical Composition | Weight percentage |
| Cu | 78.5 - 81.5 % |
| Pb | 0.05 % |
| Fe | 0.05 % |
| Zn | Remainder % |
| Total Impurity | 0.15 % |
| Main Applications |
| Electrical : Battery Caps,Rotor Bars,AC Motors |
| Industrial : Pump lines, Welding Wire, Flexible Hose |
| Consumers : Clock Dails,Musical Instrument Parts |
| Architecture : Ornamental Components |
| Physical Properties Typical values in annealed temper at 20 °C | ||
| Density | 8.67 | g/cm3 |
| Thermal expansion coefficient -191 .. 16 | 9.0 | 10-6/K |
| Specific heat capacity - 0 .. 300°C | 18.8 | 10-6/K |
| Thermal conductivity | 0.380 | J/(g•K) |
| Electrical conductivity (1 MS/m = 1 m/(O mm²) | 142 | W/(m•K) |
| Electrical conductivity (IACS) | 32.8 | MS/m % |
| Thermal coefficient of electrical resistance (0 .. 200 C) | 1.5 | 10-3/K |
| Modulus of elasticity ( 1 GPa = 1 kN/mm²) cold formed | 119 | GPA |
| Mechanical Properties (EN 1652) | ||||
| Temper | Tensile Strength Rm MPa(N/mm2) |
Yield Strength Rp0.2 MPa(N/mm2) |
Elongation A50mm % |
Hardness HV |
| O (SOFT) | 265 Min | 150 | 40 Min | 80 Max |
| HB (half Hard) | 340 Min | 200 | 10 Min | 95 Min |
| HD (Hard) | 400 Min | 320 | 5 Min | 120 Min |