The chemical composition of SM490 mainly includes carbon (C), silicon (Si), manganese (Mn), sulfur (S) and phosphorus (P). Specifically, the range of its chemical composition is roughly as follows: carbon (C) content does not exceed 0.20%, silicon (Si) content does not exceed 0.55%, manganese (Mn) content does not exceed 1.60%, sulfur (S) and phosphorus (P) The content does not exceed 0.035%. Please note that depending on the specific SM490 steel plate model (such as SM490A, SM490B, SM490C, etc.) and the manufacturer, the chemical composition may be slightly different.
The content of these chemical elements has a direct impact on the performance of steel plates. For example, carbon is the main alloying element in steel. Increasing the carbon content can increase the yield point and tensile strength of the steel, but may also reduce its plasticity and impact resistance.
As a reducing agent and deoxidizer during steelmaking, silicon can improve the elastic limit, yield point and tensile strength of steel. Manganese can increase the strength of steel, eliminate the harmful effects of sulfur, and improve the hot workability of steel. Sulfur and phosphorus are harmful impurities in steel, which will reduce the plasticity and impact toughness of steel.
