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ASTM A36 Baden Steelbar Bolt Corp.A36 is a ASTM International specification for carbon steel.The A36 carbon steel specification covers shapes,plates and bars of structural quality.It is used in riveted,bolted or welded construction of bridges,buildings and for general structural purposes.sp.info25mm astm a36 structural carbon steel plates for buildings 25mm Tk ASTM A36 Structrual Carbon Steel Plates for . Steel Plate A36, A36 Plates for Buildings, A36 Carbon Steel Plates manufacturer / supplier in China, offering 25mm Tk ASTM A36 Structrual Carbon Steel Plates for Buildings, Stainless Steel ANSI B16.5 RF Weld Neck Flanges, 8inch Schedule 80 Tp316L Seamless Stainless Steel Pipe and so on.