Chinese High strength abrasion resistant steel plate for construstion machine
NM550 Chemical composition
| Grade | Chemical composition(Quality fraction)/% | ||||||||||
| C | Si | Mn | P | S | Cr | Ni | Mo | Ti | B | Als | |
| ≤ | ≤ | ≤ | ≤ | ≤ | ≤ | ≤ | ≤ | ≤ | scope | ≥ | |
| NM550 | 0.38 | 0.70 | 1.70 | 0.020 | 0.010 | 1.20 | 1.00 | 0.70 | 0.05 | 0.0005~0.006 | 0.01 |
NM550 Mechanical properties and process performance
| Grade | Thickness mm | Tensile strength Rm/MPa | Elongation A/% | Impact power at -20℃ KV2/J | Surface Brinell hardness HBW |
| NM550 | ≤70 | - | - | - | ≥530 |
| Tensile strength, elongation, and impact power are special performance requirements. If the user does not specify these in the contract, only Brinell strength is guaranteed. | |||||