High toughness crack-resistant and wear-resistant steel NM400Tuf-NM500Tuf of GONMO Steel, the latest upgrade of traditional wear-resistant steel, is the best strength and toughness combination for wear resistance for construction machinery in the domestic market. Cracking and crack propagation are inhibited by significantly improving impact toughness while maintaining the same product strength and hardness. For instance, the impact property of NM450Tuf at -20°C can reach more than 100J, which is about 60%-80% higher than traditional wear-resistant steel, and up to 4 times the national standard.