钢材重量计算

角钢=边长*边厚*0.015

 焊管/无缝钢管=(外径-壁厚)*壁厚*0.02466

 方管=边长*4*0.00785=周长除以3.14

 矩形管=(长+宽)*2*壁厚*0.00785

 扁钢=宽度*壁厚*0.00785

 镀锌扁钢=宽度*壁厚*0.00785*1.06

 板材=长度*宽度*厚度*0.00785

 花纹板=[厚度*0.0785+0.3]*长度*宽度

 六角钢=对边*对边距离*0.0065