# Theoretical calculation formula for ferrous metal materials

Ferrous metal material theoretical weight calculation formula black metal material theoretical weight calculation formula

Table 1
 name unit Calculation formula Note Round steel, wire rod Kg/m W=0.006165Ã—d2 d=diameter (mm) Rebar Kg/m W=0.00617Ã—d2 d=section diameter (mm) Square steel Kg/m W=0.00785Ã—d2 d=side width (mm) flat steel Kg/m W=0.00785Ã—dÃ—b d=side width (mm) b=thickness (mm) Hexagonal steel Kg/m W=0.006798Ã—d2 d=edge distance (mm) Octagonal steel Kg/m W=0.0065Ã—d2 d=edge distance (mm) Equal angle steel Kg/m W=0.00785Ã—[dÃ—(2b-d)+0.215(R2-2r2)] b = side width d = side thickness R = inner arc radius r = end arc radius Unequal angle steel Kg/m W=0.00785Ã—[d(B+bd)+ 0.215(R2-2r2)] B = long side width b = short side width d = side thickness R = inner arc radius r = end arc radius Channel steel Kg/m W=0.00785Ã—[hd+2t(bd)+ 0.349(R2-r2)] H=high b=leg length d=waist thickness t=average leg length R=inner arc radius r=end arc radius I-beam Kg/m W=0.00785Ã—[hd+2t(bd)+ 0.8584(R2-r2)] H=high b=leg length d=waist thickness t=average leg length R=inner arc radius r=end arc radius Steel plate Kg/m2 W = 7.85 Ã— b b = thick Steel pipe (seamless and welded steel pipe) Kg/m W=0.02466Ã—S(DS) D=outer diameter S=wall thickness

Note: Since the profile has a tolerance value during the manufacturing process, the theoretical weight calculated by the formula has a certain difference from the actual weight.

(The error is generally between 0.2 and 0.7%) and can only be used as a reference for estimation.
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