Why is the P S and carbon content required in L245N pipeline steel

L245N belongs to pipeline steel, and it produces wide and thick steel plates with a thickness of 6mm-40mm for straight seam welded pipes for oil and natural gas transportation and other straight seam welded pipes for fluid transportation. L245N pipeline steel is mainly used for gas, water and oil transportation in the natural gas industry. L245N steel delivery condition is normalizing.

The chemical composition of L245N pipeline steel should be adapted to the welding performance requirements of automatic welding and repair welding processes in the manufacture of welded pipes, and the requirements of pipe girth butt welding should be taken into account. In order to ensure the acid corrosion resistance of the finished product, the sulfur content should be controlled below 0.002%, and calcium treatment should be used to improve the morphology of the sulfide. Reduce carbon and manganese segregation, so that the hardness of the steel pipe is controlled at HRC less than or equal to 22.