A36 Hot Rolled Steel Round Bars
A36 is plate and section, very widely used in structures such as brackets and legs. It is suitable for riveted, bolted and welded structures for bridges and buildings, as well as for general-purpose structural steel-quality carbon steel sections, plates and bars.
The yield of A36 round bar is around 240MP, and will make its yield value decrease with the increase of the thickness of the material, due to the moderate carbon content, the comprehensive performance is better, the strength, plasticity and welding and other properties to get a good match, the most widely used.
a36 mild steel round bar chemical composition
| Carbon Steel | C | Cu | Fe | Mn | P | Si | S |
| A36 | 0.25 - 0.290 % | 0.20 % | 98.0 % | 1.03 % | 0.040 % | 0.280 % | 0.050 % |
a36 carbon steel round bar mechanical property
| Hanical Properties | Metric | Imperial |
| Tensile Strength, Ultimate | 400 - 550 MPa | 58000 - 79800 psi |
| Tensile Strength, Yield | 250 MPa | 36300 psi |
| Elongation at Break (in 200 mm) | 20.0 % | 20.0 % |
| Elongation at Break (in 50 mm) | 23.0 % | 23.0 % |
| Modulus of Elasticity | 200 GPa | 29000 ksi |
| Bulk Modulus (typical for steel) | 140 GPa | 20300 ksi |
| Poissons Ratio | 0.260 | 0.260 |
| Shear Modulus | 79.3 GPa | 11500 ksi |
A36 carbon steel rod tolerances
| Shape / Section | Size, diameter or width across flats | Permitted variation |
| milimeter | milimeter | |
| Round | ≥6 ≦ 18 > 18 ≦ 30 > 30 ≦ 50 > 50 ≦ 80 > 80 ≦ 100 |
+ 0 to - 0.070 + 0 to - 0.085 + 0 to - 0.100 + 0 to - 0.120 + 0 to - 0.140 |
| Flat (thickness) | < 18 > 18 ≦ 30 > 30 ≦ 50 > 50 ≦ 80 |
+ 0 to - 0.110 + 0 to - 0.130 + 0 to - 0.250 + 0 to - 0.350 |
| Flat (width) | < 18 > 18 ≦ 30 > 30 ≦ 50 > 50 ≦ 80 > 80 ≦ 100 > 100 ≦ 130 > 130 ≦ 160 > 160 ≦ 320 |
+ 0 to - 0.110 + 0 to - 0.130 + 0 to - 0.160 + 0 to - 0.190 + 0 to - 0.220 + 0 to - 0.350 + 0 to - 1.00 + 1.00 to - 1.00 |
| Square and hexagon |
≥ 6 ≦ 18 > 18 ≦ 30 > 30 ≦ 50 > 50 ≦ 80 > 80 ≦ 105 |
+ 0 to - 0.090 + 0 to - 0.110 + 0 to - 0.130 + 0 to - 0.160 + 0 to - 0.250 |
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