NM500 steel plate use
First, NM500 steel plate is a high-strength wear-resistant steel plate, which has high anti-wear ability. Name :N is the first pinyin letter of "resistant" in "wear-resistant"; M is the first pinyin letter for "grind" in "wear".500 is the Brinell hardness value HB value.
NM500 steel plate application: NM500 wear-resistant steel plate is widely used in construction machinery, environmental protection machinery, metallurgical machinery, abrasive tools, bearings and other product parts.
Chemical composition of NM500 steel plate
Under the premise of ensuring the function of the steel plate, the Cr, Ni and Mo of the rules in Table 1. Alloying elements can be used in any combination, or other microalloying elements other than those specified in Table 1 can be added, and the specific content should be indicated in the quality certificate.
When Cu is the remaining element in steel, its content should not be greater than 0.3%; As content should not be greater than 0.08%. No analysis if the supplier can guarantee.
CEV (%) =C+Mn/6+(Cr+Mo+V)/5+(Cu+Ni) / 15----(1)
When using total aluminum (Alt) content calculation, Alt should not be less than 0.015%
The error tolerance of the chemical composition of the steel plate shall comply with the rules of GB/T 222.
Four, NM500 steel plate mechanical properties
The Brinell hardness value of 500 (HBW) is mainly to provide protection in the need for wear-resistant occasions or parts, so that the equipment life is longer, reduce the maintenance and downtime caused by repair, and correspondingly reduce the investment of funds.
Charpy pendulum impact work is calculated according to the average calculation meter of the three samples, and the value of one sample is allowed to be lower than the standard value in Table 2, but the steel plate with a thickness of less than 70% of the standard value shall not be subjected to Charpy pendulum impact test.
5, NM500 steel plate sampling method and test method should be
Serial number Check item Sampling quantity Sampling method Test method
1 Stretch 1GB/T2975-82GB228/T-2002
2 Impact 3GB/T2975-82GB/T229-1994
3 Hardness 1GB/T2975-82GB231-84.
