Grade | Main composition | Others | ||||||
Japan | America | Cu | Ni | Zn | Fe | Al | Pb | Mn |
C7521 | C75200 | 64.5-66.5 | 16.5-19.5 | Allowance | -- | -- | -- | -- |
C7701 | C77000 | 53.5-56.5 | 16.5-19.5 | Allowance | -- | -- | -- | -- |
Grade | State | Tensile strength(MPa) | Extensibility (%) | Vivkers hardness(HV) | Bending angle | Bending radius |
C7521 | O | ≥375 | ≥20 | -- | 180 degree | bending 108 degree |
1/2H | 400-570 | ≥5 | 120-180 | 180 degree or W | thickness*1 | |
H | ≥540 | ≥3 | ≥150 | 180 degree or W | thickness*2 | |
C7701 | 1/2H | 540-655 | ≥8 | 150-210 | 180 degree or W | thickness*1.5 |
H | 630-735 | ≥4 | 180-240 | 180 degree or W | thickness*2 | |
EH | 705-805 | -- | 210-260 | 90 degree | thickness*3 | |
SH | 765-865 | -- | 230-270 | -- | -- |