9.冷拔无缝异型钢管(GB/T3094-1982)(1)尺寸规格6-40~6-45(2)允许偏差6-46,6-47(3)力学性能6-48(4)用途用于各种结构件，工具和机械零部件的生产制造表6-40冷拔无缝方形钢管的尺寸规格表6-40-1基本尺寸截面面积F/?理论质G/(kg/m)惯性矩JX=JY/c截面系数WX=WY/?ASmm120.81.00.3480.4230.2730.3320.07390.08730.1230.146141.01.50.5030.7120.3940.5590.1440.1920.2060.274161.01.50.5830.8320.4580.6530.2220.3000.2780....
