It is a deformed round steel bar and has a diameter of 12mm.
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The only difference between Y12 and T12 is the Kilos per meter. In a Y12 there is 0.888 Kilos and a T12 bar has 0.612 Kilos.
785okg/m3
In the context of concrete reinforcement steel, a Y12 bar refers to a deformed steel bar with a diameter of 12 millimeters. The "Y" indicates that it is a high-strength deformed steel bar. On the other hand, an R10 bar refers to a round steel bar with a diameter of 10 millimeters. The "R" signifies that it is a mild steel bar without any deformations.
A short piece of solid bar steel used when jointing 2 pieces of tubing. The tubes are slid over the slug, to reinforce the joint and it adds additional metal to weld too.
volume of steel multiplied by7850= wt of steel in kgs. Please note that wt of 1 Cum steel is 7850 kg Volume of steel bar can be calculated = cross-sectional area of bar X length cross-sectional area of Bar= pie x d X d/4 (where d is diameter of bar)