云南钢亚商贸有限公司云南昆明方钢厂家方钢***方钢价格联系方式13678716875（微信）赵师方钢理论重量计算公式：边长Х边长Х0.00785=kg/m方钢可以分为有缝和无缝。有缝方钢是由钢板焊接在一起，做成方形钢管。无缝方钢是由无缝钢管改拔而制的。其抗压能力远远大于有缝方管。边长（mm)截面面积(cm2)理论重量(kg/m)边长（mm)截面面积(cm2)理论重量(kg/m)50.250.196309.007.0660.360.2833210.248.0470.490.3853411.569.0780.640.5023612.9610.1790.810.6363814.4411.24101.000.7854016.0012.56111.210.954217.6413.85121.441.134520.2515.90131.691.334823.0418.09141.961.545025.0019.63152.251.775328.0922.05162.562.015631.3624.61172.892.276036.0028.26183.242.546339.6931.16193.612.826542.2533.17204.003.147049.0038.49214.413.467556.2544.16224.843.808064.0050.24245.764.528572.2556.72256.254.919081.0063.59266.765.309590.2570.85287.846.15100100.0078.50表注:(1)在标准件中，边长105~250毫米的方钢未列出截面面积及重量，必要时可参照表列数据的倍数进行算。(2)方钢的长度规定如下：A.通常长度（非定尺的）：普通钢：边长≤25mm…………………………………………长5~10m边长26~50mm….………………………………………长4~9m边长53~110mm….……………………………………长4~8m边长≥120mm….…………………………………………长3~6m优质钢：各种边长尺寸…………………………………………………长2~6mB.定尺长度（合同中确定）C.倍尺长度（合同中确定）高压锅炉管短尺方钢的交货数量不得超过一批订货总量的10%。普通钢短尺不短于2.5m，优质钢短尺不短于1.5m。方钢理论重量计算公式：边长Х边长Х0.00785=kg/m方钢可以分为有缝和无缝。有缝方钢是由钢板焊接在一起，做成方形钢管。无缝方钢是由无缝钢管改拔而制的。其抗压能力远远大于有缝方管。边长（mm)截面面积(cm2)理论重量(kg/m)边长（mm)截面面积(cm2)理论重量(kg/m)50.250.196309.007.0660.360.2833210.248.0470.490.3853411.569.0780.640.5023612.9610.1790.810.6363814.4411.24101.000.7854016.0012.56111.210.954217.6413.85121.441.134520.2515.90131.691.334823.0418.09141.961.545025.0019.63152.251.775328.0922.05162.562.015631.3624.61172.892.276036.0028.26183.242.546339.6931.16193.612.826542.2533.17204.003.147049.0038.49214.413.467556.2544.16224.843.808064.0050.24245.764.528572.2556.72256.254.919081.0063.59266.765.309590.2570.85287.846.15100100.0078.50表注:(1)在标准件中，边长105~250毫米的方钢未列出截面面积及重量，必要时可参照表列数据的倍数进行算。(2)方钢的长度规定如下：A.通常长度（非定尺的）：普通钢：边长≤25mm…………………………………………长5~10m边长26~50mm….………………………………………长4~9m边长53~110mm….……………………………………长4~8m边长≥120mm….…………………………………………长3~6m优质钢：各种边长尺寸…………………………………………………长2~6mB.定尺长度（合同中确定）C.倍尺长度（合同中确定）高压锅炉管短尺方钢的交货数量不得超过一批订货总量的10%。普通钢短尺不短于2.5m，优质钢短尺不短于1.5m。)