方管重量計(jì)算公式:4*壁厚*(邊長(zhǎng)-壁厚)*0.00785
矩形管重量計(jì)算公式:(周長(zhǎng)/3.14-壁厚)*壁厚*0.02466
常見無縫方管型號(hào):
Q345A:C≤0.20,Mn ≤1.70,Si≤0.50,P≤0.035,S≤0.035;
Q345B:C≤0.20,Mn ≤1.70,Si≤0.50,P≤0.035,S≤0.035;
Q345C:C≤0.20,Mn ≤1.70,Si≤0.50,P≤0.030,S≤0.030,Al≥0.015;
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