ASTM A179 npog tsawg kawg-Phab ntsa tuab, Seamless khaub thuas-Dreel leeg tub rog rau tubular, cua sov sib pauv, thiab lwm yam kev pabcuam kub.seamless astm 119 tus raj steel yog muab rau thiab tsim los ntawm cov qauv ua kom txias.Tshuaj lom neeg muaj cov tshuaj muaj cov pa roj carbon, manganese, phosphorus, thiab leej faj.Kev Xeem Yuav Tsum Tau: Qhov kev ntsuas hardness, pluav kev kuaj, flaring kuaj, flange kuaj, thiab hydrostatic qhov kev xeem.