NM400 steel plate is a kind of wear-resistant steel plate. NM - The first letter of the Chinese phonetic alphabet, and 400 is for wear resistance. Wear resistance is the Brinell hardness HB value, and the hardness value of domestic NM400 steel plate is 360-420.
The suitable cutting method for NM400 steel plate is cold cutting and hot cutting. Cold cutting includes water jet cutting, machine cutting, sawing or abrasive cutting; hot cutting includes oxygen fuel flame cutting (hereinafter referred to as "flame cutting"), isoparticle cutting and laser cutting.
The flame cutting method of NM400 steel plate is as simple as that of ordinary low-carbon and low-alloy steel. With the increase of NM400 steel plate thickness and hardness, cracks tend to increase at the edge of cutting.
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