Simple calculation of round steel weight

For the calculation of the weight of round steel, the general theoretical formula is G=D~2π/4×ρ(density)×l(length)/10~6 or G=r~2π×ρ(density)×l(length)/10 ~6 is more troublesome when there is no calculator. We have a fixed coefficient of 6.165 at work, so it is convenient to calculate it. Example: a cylindrical low carbon steel with a diameter D of 100 mm and a length of 100 mm, for its weight;

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