We know the formula D2/162 which is being used for calculate unit weight of reinforcement per meter.
Here I am willing to explain how it has been arrived D2/162 (Note: D unit is in MM)
Weight of bar per meter = Area of steel bar X Density of steel x Length of bar
= (3.14 x D2/4) x 7850 kg/m3 x 1 m
= D2 X 6162.25/(1000x1000)
= D2 X (0.006162)
= D2 X 1/(0.006162)-1
= (D2/162.28)
The actual value is D2/162.28
Kindly note that this function is only applicable for circular shape steel which density is 7850kg/m3
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0.283 pounds per cubic inch
Yes. It can sometimes be made of plastic or have a vinyl coating. To be precise it is a mild steel.
The most common steel is mild steel, also called plain-carbon steel. It's density is approximately 7.85g/cm3. (Wikipedia)
Charles Babbage used mild steel, brass, metal, and gears
Engineers and metal workers use the following abbreviations for metals. SS - Stainless Steel. MS- Mild Steel which means the weakest strength steel which is made. RHS - Rectangular Hollow Section. SHS - Square Hollow Section. There are many grades of Stainless Steel, depending upon what it is to be used for. Some cheap grades of SS , are only partly rust resistant. More expensive types such as used to make kitchen sinks, are totally rust free.