优质碳素结构钢
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Steel No. 20 steel, 45 steel, 65Mn
Specifications 12mm-300mm
Implementation standard GB/T699-2015
Quality grade National standard
Purpose Mainly used for manufacturing general structure and mechanical structure parts and components, building structure parts and pipelines for conveying fluids. Depending on the use requirements, it is sometimes necessary to use it after heat treatment (normalizing or quenching and tempering).
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