China P21 NAK80 Steel Round Bar for high percision mirror plastic mold, Find details about China NAK80 Steel, alloy steel from P21 NAK80 Steel Round Bar for high percision mirror plastic mold
C | Si | Mn | P | S | Ni | Mo | Cu | Al |
0.10-0.18 | ≤0.35 | 1.70-2.0 | ≤0.030 | ≤0.030 | 2.90-3.40 | 0.20-0.50 | 0.80-1.20 | 0.70-1.10 |