1)The hardness of NM450 is greater than that of NM400. The typical hardness range for NM400 is 400-440HBW, whereas NM450 has a higher hardness range of above 450-500HBW. This implies that NM450 has a higher level of resistance to wear, can effectively withstand the wear caused by hard substances, and extend the lifespan of the equipment.
2)NM450 has better impact resistance than NM400. Since NM450 has advanced hardness and better durability, it's better suitable to maintain its integrity and stability in the face of shock or vibration. This makes the NM450 more dependable and durable in extreme working conditions.
In addition, the wear and tear resistance of NM450 is better in high temperature terrain. Working in a high temperature terrain tends to accelerate the wear and tear of ordinary sword, and the high hardness and excellent wear and tear resistance of NM450 enable it to maintain a longer service life under high temperature conditions.
To sum up, NM450 exhibits clear advantages compared to NM400 when considering hardness, impact resistance, and resistance to wear at high temperatures. However, the decision regarding which type of wear-resistant steel to utilize still needs to be based on the particular working conditions and requirements. Whether you decide to use either NM400 or NM450, both of these materials are dependable and resistant to wear. They have the ability to significantly prolong the lifespan of equipment, decrease maintenance expenses, and enhance work productivity.