ASTM A633 standard covers four grades A, C, D, and E normalized high-strength low-alloy structural steel plates for welded, riveted, or bolted construction. Comparison of S355K2 and SA572 Grade 55 steel, A633 Grade A structural steel provides a minimum yield point of 42 ksi [290 MPa] in thicknesses through 4 in. [100 mm], inclusive. Grades C and D provide a minimum yield point of 50 ksi [345 MPa] in thicknesses up to 2.50 in. [65 mm], inclusive and 46.0 ksi [315 MPa] in thicknesses over 2.50 in. to 4.0 in. [65 to 100 mm], inclusive.
Comparison of S355K2 and SA572 Grade 55 steel, Hardened wear-resistant plate refers to the low-alloy steel plate that is hardened by quenching during the rolling process or the low-alloy steel plate is heat treated and hardened. The hardness is generally HB350-500. The wear-resistant layer of the bimetal wear-resistant plate is of high alloy composition. There are a large number of high-hardness alloy carbides (about HV1600) embedded in the matrix in the metallographic structure, which are the main carbides that play a role in anti-wear. The actual micro hardness of the wear-resistant layer is much higher than the measured macro hardness, and its strengthening method is the same as that of cemented carbide.
Quenching Improve the hardness of Comparison of S355K2 and SA572 Grade 55 steel steel, Annealing is refine the grain size, homogenization, reduce hardness, improve the plasticity and eliminate interna stress. Normalizing refine grain , improve the impact toughness of Comparison of S355K2 and SA572 Grade 55 steel steel and comprehensive mechanical properties.
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