What are the main properties of NM400 plate?
NM400 material is a high-strength wear-resistant steel plate. NM—The first letter 400 of the Chinese Pinyin of the Chinese Pinyin of "Near" and "Made" for wear resistance is the Brinell hardness value HB value.
NM400 plate has quite high mechanical strength; its mechanical properties are 3 to 5 times that of ordinary low-alloy steel plates; it can significantly improve the wear resistance of mechanical related parts; therefore, increase the service life of the machinery; reduce production costs. The surface hardness of the product is usually up to 360～450HB. Suitable structural steel plates for processing and manufacturing wear-resistant and wearing parts for mines and various engineering machinery.
Chemical composition characteristics of NM400 plate
The traditional wear-resistant steel used for construction machinery is generally high manganese steel. Although high manganese steel has work hardening, it has strong hardening ability after being subjected to impact stress during its use, so it can only be used under large impact loads. However, for working conditions with small impact loads, the hardness and wear resistance cannot be improved, and after the high manganese steel is work-hardened, its yield strength is not high. Under the action of greater force, the workpiece sometimes Cracks will occur and it is difficult to achieve the expected service life. Therefore, compared with high manganese steel, low-alloy wear-resistant steel has been used to make small and medium-sized mechanical materials in recent years, and it is also applied in the field of construction machinery, extending and expanding high manganese steel The scope of use has been recognized by the machinery industry and has become a trend.
NM400 plate delivery status
To achieve the desired overall performance, a reasonable delivery state is essential. NM400 wear-resistant steel can obtain good combination of strength and toughness through scientific quenching and tempering process, and can also increase the hardness of steel to achieve the purpose of wear resistance. This standard specifies the delivery status of hot rolling, controlled rolling, quenching + tempering, etc. according to the design of the NM400 wear-resistant steel plate grade.
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