... .High quality ,competitive price 3.Products based on your requirement glass oil pipe1.dia.139.7 to dia.426mm 2.thickness ... ,X42(L290),X46(L320),X52(L360),X56(L390),X60(L415),X StandardSteelGradeChemical composition, %Tensity strength,MPaYield strength, MPaElongation, %CMnPSMAXMINAPI-5LB0.271 ...