ASTM A53/106 carbon steel bar Certificate:API and ISO9001 Surface treatment:paint coated Diameter:5.5mm-250mm Carbon steel bars Standard:GB Material:Q195-Q345,35CrMo,42CrMo,etc Diameter:5.5mm-250mm and more Length:as required Carbon steel barsMore types with good quality can be provided,if you have any requirement,pls contact us.Best price with high quality and good services.The detailed ...