High toughness crack-resistant and wear-resistant steel NM400Tuf-NM500Tuf, the latest upgrade of traditional wear-resistant steel, is the best strength and toughness matching wear-resistant steel for construction machinery in the Chinese domestic market, of which the cracking and crack propagation can be effectively inhibited by greatly improving impact toughness under the premise of ensuring the same level of product strength and hardness unchanged.
High-toughness crack-arresting wear-resistant steel, "crack-arresting steel" refers to steel with good fracture toughness and brittle crack suppression properties, and has the ability to prevent crack expansion. When there are potential defects or cracks in components, crack arresting steel can prevent the expansion of cracks within a small range and prevent accidents when subjected to dynamic loads and impact loads.
Main Steel Grades:NM400Tuf, NM450Tuf, and NM500Tuf
| Grade |
Yield strength (Typical) MPa |
Tensile strength (Typical)MPa |
Elongation (Typical) A50% |
HBW Brinell Hardness (Typical) |
Impact energy (-20℃) (J) |
| NM400Tuf | ≥1000 (1180) | ≥1200 (1390) | ≥10 (18.3) | 370-430 (405) | ≥48 (113) |
| NM450Tuf | ≥1100 (1290) | ≥1300 (1540) | ≥7 (16.5) | 420-480 (453) | ≥48 (106) |
| NM500Tuf | ≥1200 (1390) | ≥1500 (1680) | ≥7 (14.5) | ≥470 (506) |
≥38 (70) |
High Toughness Wear Resistant Steel is a type of steel specially designed to resist wear and cracks. It has excellent wear resistance and toughness, and can maintain stable performance in the face of strong wear and impact.
- Has good impact resistance and fracture toughness,can maintain its integrity when subjected to shock and vibration and is less prone to breakage and cracks.
- Has excellent crack resistance, can resist the expansion and propagation of cracks, and improves the reliability of materials under harsh working conditions.


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