What is the material NM400 
NM400 is high strength wear resistant steel plate. NM400 has high mechanical strength; Its mechanical properties are ordinary low alloy steel plate of 3 to 5 times; Can significantly improve the mechanical wear and tear of the relevant member patience; Therefore improve the service life of the machine; Reduce the production cost. The product surface hardness is usually up to 360 ~ 450 hb. Used in mining and all kinds of engineering machinery with wear-resistant parts machining and manufacturing for the structure of the steel plate. 
NM400 is one of the steel plate. NM - said wear-resisting purpose "resistance" and "grinding" hanyu pinyin first letter is 400 brinell hardness value HB. (400 hardness value is generalized, domestic NM400 hardness value range 360-420.) 
NM400 wear-resistant steel plate is widely used in engineering machinery, mining machinery, coal machinery, environmental protection machinery, metallurgical machinery spare parts and other products. Excavators, loaders, bulldozers shovel plate, blade plate, side plate blade, blade. Crusher plate, blade. 
Wear-resistant steel plate delivery status can be divided into: conditioning (i.e., quenched and tempered) 
NM400 chemical composition 
Component manufacturer C Si Mn P S Cr Mo Ni B CEV 
brand 
NM400 WuGang acuities were 0.25, 0.70, 1.60, 0.025 or less or less or less acuities were 0.010, 1.4, 0.50, 1.00, 0.004 or less or less or less or less 
NM400 mechanical properties 
Steel grade hardness (HB) 20 ℃ AKV longitudinal J 
WNM400 [1] A 360-430 
WNM400 B 360-430 
Provide the tensile properties of steel plate Rp0.2, Rm, A50 measured values. 
Provide steel 0 ℃, 20 ℃ longitudinal impact of measured values (AKV). 
Hardness notation 
NM400 [1] of brinell hardness HB left mm thickness and hardness of the commonly used representation length width of m m size left look down at the bottom of the said method 
Hardness is divided into: rockwell hardness, brinell and vickers hardness, hardness, shore hardness, barcol hardness on the Richter scale, knoop hardness, Webster's hardness. Vickers hardness to HV said, rockwell hardness can be divided into HRA, HRB, HRC, HRD and brinell hardness HB [N] (KGF/was) said (HBS \ HBW) (GB/T231-1984), the production was measured with cloth hardness of annealing, normalizing and qualitative steel hardness is not a simple physical concept, but the material mechanical properties such as elasticity, plasticity, strength and toughness of composite indicator. Hardness test according to the different test methods can be divided into static pressure method (such as brinell, rockwell, vickers hardness, etc.), scratch method (such as mohs hardness), rebound method (e.g., shore hardness) and microhardness, a variety of methods such as high hardness. 
 
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Delivery status: according to customer requirements, according to hot rolling, normalizing, tempering, normalizing and tempering, the tempering different status, such as the delivery of the goods 
Level of quality: A, B, C, D, E and Z to performance Z15, Z25, Z35