ArcelorMittal USA said s45c heat treatment it was planning to work with the United Steelworkers union "to minimize the impact on its employees. The company will continue to communicate with its customers to understand the market impact of the outbreak of covid-19, which may require additional capacity optimization to maintain a balance between supply and demand.
The addition of Ca element in steel such as s45c heat treatment can refine grain size, partly desulphurize and change the composition, quantity and morphology of non-metallic inclusions. It is similar to that of adding rare earth in steel. It can improve the corrosion resistance, wear resistance, high temperature and low temperature resistance of steel, improve the impact toughness, fatigue strength, plasticity and welding performance of the steel, and increase the cold heading, shock resistance, hardness and contact endurance strength of the steel.
S500MC hot-rolled high-strength steel chemical composition (melting analysis)%C: ≤0.12, Si: ≤0.50, Mn: ≤1.60, P: ≤0.25, S: ≤0.020, Ait: ≥0.015, Nb: ≤0.09, V: ≤0.20, Ti: ≤0.15Mechanical propertiesYield strength MPa: ≥500Tensile strength MPa: 550-700Elongation: ≥12
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