SS400 Steel Vs STM A573 structural carbon steel

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40CrMo alloy structural steel specification
Grade: 40CrMo
Standard: GB/T 3077-1988
Mechanical properties:
Tensile strength σb (MPa): ≥1080 (110)
Yield strength σs (MPa): ≥930 (95)
Elongation rate δ5 (%): ≥12
Section shrinkage ψ (%): ≥45
Impact energy Akv (J): ≥63
Impact toughness value αkv (J / cm2): ≥78 (8)
Hardness: ≤ 217HB
Sample size: Sample blank size is 25mm

The wear-resistant plate STM A573 structural carbon steel shows good wear resistance: the chemical composition of the alloy layer contains 4-5% carbon and 25-30% chromium. The volume fraction of Cr7C3 carbide in the metallographic structure is more than 50%, the macro hardness is HRC56-62, and the hardness of chromium carbide is HV1400-1800. Because of the vertical distribution of carbides in the wear direction, the wear resistance of the cast alloy with the same composition and STM A573 structural carbon steel hardness is more than twice as that of the cast alloy with the same composition and hardness. Compared with several typical materials, the wear resistance is as follows: (1) compared with low carbon steel; 20-25:1 (2) with as cast high chromium cast iron; 1.5-2.5:1.

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