A36 A283 carbon steel plate, S355JR is a European standard low alloy high strength structural steel, which is in accordance with EN10025-2. The hardness of S355JR steel is 70-80B, and the yield strength of S355JR steel is 355MPa. JR stands for quality level, equivalent to level B in ChinaChemical composition of S355JR steel: C: < 0.22; Si: < 0.55; Mn: < 1.60; P: < 0.025; S: < 0.025S355JR steel is equivalent to Q345B in China.
Manganese is used to deoxidize and remove sulfur in steel when making steel. It is an beneficial element in A36 A283 carbon steel plate steel. Manganese has a strong ability to deoxidize and remove sulfur, it can eliminate or reduce the hot brittleness caused by oxygen and sulfur, and improve the strength and hardness of A36 A283 carbon steel plate steel.
When automatic steel plate cutting is carried out, the distance difference between the steel plate hanging from the steel plate to the gas cutting platform should be adjusted to within 5mm.When semi-automatic cutting is carried out, the guide rail should be placed on the plane of the steel plate to be cut, and then the cutting machine should be placed lightly on the guide rail.Make one side of the cutting torch face the operator, choose the cutting nozzle according to the thickness of the steel plate, adjust the cutting straightness and cutting speed.