info@gescosteel.com
Chemical Composition (%) of NM Wear Resistant Steel
| Steel Grade | C | Si | Mn | P | S | Cr | Mo | B | N | H | Ceq |
| NM360/NM400 | ≤0.20 | ≤0.40 | ≤1.50 | ≤0.012 | ≤0.005 | ≤0.35 | ≤0.30 | ≤0.002 | ≤0.005 | ≤0.00025 | ≤0.53 |
| NM450 | ≤0.22 | ≤0.60 | ≤1.50 | ≤0.012 | ≤0.005 | ≤0.80 | ≤0.30 | ≤0.002 | ≤0.005 | ≤0.00025 | ≤0.62 |
| NM500 | ≤0.30 | ≤0.60 | ≤1.00 | ≤0.012 | ≤0.002 | ≤1.00 | ≤0.30 | ≤0.002 | ≤0.005 | ≤0.0002 | ≤0.65 |
| NM550 | ≤0.35 | ≤0.40 | ≤1.20 | ≤0.010 | ≤0.002 | ≤1.00 | ≤0.30 | ≤0.002 | ≤0.0045 | ≤0.0002 | ≤0.72 |
Mechanical Properties of NM Wear Resistant Steel
| Steel Grade | Yield Strength /MPa | Tensile Strength /MPa | Elongation A50 /% | Hardess (Brinell) HBW10/3000 | Impact/J （-20℃） |
| NM360 | ≥900 | ≥1050 | ≥12 | 320-390 | ≥21 |
| NM400 | ≥950 | ≥1200 | ≥12 | 380-430 | ≥21 |
| NM450 | ≥1050 | ≥1250 | ≥7 | 420-480 | ≥21 |
| NM500 | ≥1100 | ≥1350 | ≥6 | ≥470 | ≥17 |
| NM550 | - | - | - | ≥530 | - |