Weight | = | Volume x density | |
Since its cylindical shape | |||
Volume of bar | = | pi()*h*(d²)/4 | mm³ |
where | h is height of cylinder bar | ||
d is diameter in mm | |||
Weight density of steel | = | 7850 | kg/m³ |
Here we considering for 1m length, so h = 1m | |||
Volume of bar | = | pi()*h*(d²)*(10⁻⁶)/4 | m³ |
= | pi()/4*h*(d²)*(10⁻⁶) | ||
Here we have coverted dia from mm to m | |||
Volume of bar | = | (7.85*(10⁻⁷))*(d²) | m³ |
Weight of bar | = | Weight density x Volume | |
or unit weight of steel | = | 7850*(7.85*(10⁻⁷))*(d²) | |
= | 0.00616225 | *d² | |
or can be written as | = | d²/ | 162 |
where d is diameter of bar in mm | |||
Example | |||
25mm bar weight per meter = | 25*25/162 | ||
= | 3.858024691 | kg | |
Weight of steel | = | (d²/162)*length |
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Thursday, February 22, 2018
How to calculate weight of mild steel bar?
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