... ,ASTMA53, ect. Dimension:50*37-400*104 channel steel bar(high quality and low price)The products of Hengji Steel include ... welded pipes, square and rectangular hollow section, angle steel bar, I-beam steel bar, H-beam steel bar, channel steel bar, ... power, steel structural products, building, etc. The company implements international and domestic standards including API SPEC 5CT, API SPEC5L,ASTMA53,CB ...