标准: ASTM A179/(ASME SA179) 热交换器和冷凝器用不锈钢无缝钢管 Seamless Cold Drawn Steel Tube For Heat Exchanger And Conderser Application: 用于锅炉热交换器、冷凝器、类似的热转换器 For tubular heat exchangers,condensers,and similar heat transfer apparatus. Size(mm): 外径O.D.:16~76.2 壁厚W.T.:1~22  长度L：max 14000 化学成分Chemical Composition(%):                      C,%                     0.06~0.18                            Mn,%                            0.27~0.63                            P,%              ≤0.035                            S,%              ≤0.035   机械化学性能 Mechanical Properties(Mpa):   抗拉强度（Mpa）Tensil strength               ≥325 屈服强度(Mpa) Yield point               ≥180 伸长率（%）Elongation               ≥35 矩形管理论重量表 矩形管规格表 脚手架管理论重量计算公式