C42500Return
【chemical composition】Chemical Composition(%)
| Cu | Zn | Sn | |||
| 87%-90% | Balance | 1.5%-3.0% |
*chemical compositionFor reference only
【physical characteristics】Physical Properties
| Density | proportion | g/cm3 | 8.75 |
| Electrical Conductivity | Conductivity[note -] | %IACS | 25 |
| Thermal Conductivity | heat conductionsystemnumber | W/(m. K) | 120 |
| Coefficient of Thermal Expansion | thermal expansionsystemnumber | 10 -6/K | 18.4 |
| Modulus of Elasticity | elasticsystemnumber | GPa (kN/mm2) | 126 |
Stress Relaxation(Remaining Stress) Rate 150°C X 1000h | Stress relaxation rate | % | 62 |
The above values are average reference values for reference only
Note 1: this value is the lowestTemperAs benchmark
【mechanical properties】Mechanical Properties
| Temper | Tensile Strength MPa (N/mm2) | Yield Strength MPa (N/mm2) | Elongation % | Hardness HV | Bendability 90°Bend | |
| state | Tensile strength | proof stress | elongation | hardness | thickness≤0.5mm | |
| G/W | B/W | |||||
| R320 | 320-380 | ≤230 | ≧25 | 80-110 | 0 | 0 |
| R380 | 380-430 | ≧200 | ≧16 | 110-140 | 0 | 0 |
| R430 | 430-520 | ≧330 | ≧6 | 140-170 | 0 | 0 |
| R510 | 510-600 | ≧430 | ≧3 | 160-190 | 0 | 1 |
| R580 | 580-690 | ≧520 | — | 180-210 | 1 | 2 |
| R660 | ≧660 | ≧610 | — | ≧200 | — | — |
*hardnessFor reference only