Wholesale 6mm 8mm 10mm 12mm 16mm 20mm Hot Rolled Deformed Steel Bar Iron Rod for Construction Hrb400 Hrb500 B500b Steel Rebar

Level 1, 2 and 3 steel bars are material standards formulated by the state according to social production needs. The yield strength, ultimate strength, elongation, cold bending, and weldability are very different, and the use positions of different levels of steel bars are also very similar. The yield strength of the first-class steel is 235MPa and the ultimate strength is 310MPa; the yield strength of the second-class steel is 335MPa and the ultimate strength is 510MPa; the yield strength of the third-class steel is 400MPa and the ultimate strength is 600MPa.

1. The theoretical weight of grade 2 and 3 steel bars per meter = d (diameter) * 0.00617KG/MM.

First-class steel bars: Hot-rolled round steel bars (commonly known as round steel) HPB235 (Q235). Generally, the diameters used are 6.5, 8, 10, and 12. No matter how thick the diameter is, it is not commonly used. Moreover, 6.5 and 8 are the most commonly used, and are generally used as stirrups. Second-level and third-level steel bars: hot-rolled ribbed steel bars (commonly known as rebar) HRB335, HRB400

What are the common classifications of steel bars?

According to the diameter. The specific names of steel bars are different for different diameters. Among them, those with a diameter of 3-5 mm are called steel wires, those with a diameter of 6-10 mm are called fine steel bars, and those with a diameter of more than 22 mm are called coarse steel bars.