ASTM A519 Grade 1018 Carbon Steel Seamless Tubings are Low Carbon Steel Tubings with 0.15-0.20 % carbon content with combination of 0.60-0.90 % manganese. These Tubings are also known as mild steel pipes and tubes. ASTM A519 Grade 1018 Tubings are low-cost Tubings easy to form and shape. These pipes are manufactured as per ASTM Specification and commercially referred as cs pipes or ms pipes.ASTM A519 Grade 1018 Steel Tubing and AISI 1018 Seamless ASTM A519 1018 Steel Chromoly Tubing is known to have a good combination of all of the typical characteristics of steel. For instance, the main features of the carbon ASTM A519 Grade 1018 steel pipes strength, some ductility, and comparative ease of machining.