20#碳钢液体用无缝钢管,{zx1}标准是GB8163-2008.应用于网架结构、锅炉仪表、建筑装饰、石油化工、纺织机械、军工机械、医疗电热、,其中化学成份是:碳C:0.17-0.14、硅Si:0.17-0.37、锰Mn:0.35-0.65、磷P:≤0.035、硫S:≤0.035、镍Ni:≤0.25\铬Cr:≤0.25、铜Cu:≤0.25 。交货状态分为:冷拔、热轧钢管。交货状态分为:冷拔钢管、热轧钢管、热扩钢管。规格(mm)6-10?.5-3/12-14?-4/16-18?-4/20-22?-5/25-28?-8/30-32?-5/34-36?-6/38-40?-6/42-45?-6/48-51?-8/54-57?-8/60-63.5?-6/68-70?-8/73-76?-10/80-83?-10/89-95?-14/102-108?-16/114-121?-18/127-133?-20/140-146?-30/152-159?-35/168-180?-40/194-203?-40/219-245?-40/273-299?-40/325-351?-40/377-402?-40/426-450?0-40/480-510?0-40/530-560?0-40/610-630?0-40/680-720?0-40/760-860?0-38