结构用无缝钢管的尺寸、横截面积、理论质量10页.doc

结构用无缝钢管的尺寸、横截面积、质量尺寸（mm）横截面积A（cm）质量（kg/m） dt322.53.03.54.02.322.733.133.521.822.152.462.76382.53.03.54.02.793.303.794.272.192.592.983.35422.53.03.54.03.103.684.234.782.442.893.323.75453.343.964.565.152.623.113.594.047.568.779.8910.93502.53.03.54.04.55.03.734.435.115.786.437.072.933.484.014.545.055.55543.0