ASTM A500 HOLLOW SECTION Size: 10x10to500x500mm x 0.2to40mm Material: Q195,Q215,Q235 Length:1m to 12m Brand name:YongTai ... .2-40mm 5Length: 0.5-14m 6Origin:Tianjin,China 7Material standard: A53 GRA/B, Q195,Q215,Q235,10#,20#,45#,16Mn ... national standards of galvanized steel pipe b.Using high-quality material and advanced production technology and equipment for processing c.Applicable ...