Seamless steel pipe ASTM A53 Application For mechanical and pressure use,and also for transporting steam,water,gas and etc. Size O.D.: 6.0~820.0mm W.T.: 1í½80mm L: max 12000mm Grade and Chemical Composition (úÑ) Grade Cí_ Mí_ Pí_ Sí_ Cuí_ Nií_ Crí_ Moí_ Ví_ A 0.25 0.95 0.050 0.045 0.40 0.40 0.40 0.15 0.08 B 0.30 1.20 0.050 0.045 0.40 0.40 0.40 0.15 0.08 Mechanical Propertiesú¦ Grade Rm Tensile Strength(Mpa) Yield Point(Mpa) Elongation A% A í¦330 í¦205 í¦20 B í¦415 í¦240 í¦20 Seamless steel pipe ASTM A53