... air and railway6.Chemical composition7.SizeNameseamless steel pipe1.Applicantcarbon structural steel seamless steel pipeGrade10,20,35,45,40Mn2,45Mn2,27SiMn ... G3454-1998 DIN 1629-1984 3.Applicant seamless steel tube for high pressure boilers Grade:20G,20MnG,25MnG, ... A192,ASTM SA179,SA192,BS30595. ApplicantHigh pressure seamless steel tube for chemical Fertilizer EguipmentsGrade:10,20G,Q345,Q390,10MoVNb ...