Steel Sheet Metal

Q235 steel is a plain carbon structural steel which is widely used in China. Q235 material in Chinese standard GB/T 700 is divided into 4 quality grades: Q235A, Q235B, Q235C and Q235D; Density of this steel is 7.85 g/cm3 (0.284 lb/in3), tensile strength is 370-500 MPa (54-73 ksi); yield strength is 235 MPa (34 ksi) for steel bar diameter or plate thickness ≤ 16mm. Since it is mild steel, the material is commonly used directly without heat treatment. Q235 material has moderate strength, in the case of higher strength requirements, Q275 or high-strength low alloy structural steel Q355 (former Q345) can be selected.

Meaning and Designation

"Q" is the first letter of Chinese spelling of "Qufu dian", which means Yield Point.

"235" refers to the minimum yield strength 235 MPa tested with steel bar diameter or plate thickness ≤ 16mm.

A, B, C and D represent quality grades.

Features and Applications

Q235 steel has good plasticity, toughness and weldability, as well as a moderate strength, good cold bending performance. Q235 material is commonly rolled into wire rod or round steel, square steel, flat steel, angle steel, I beam, channel steel, other sections and steel plates. These products are widely used in construction and engineering welded structures, to make steel bars or build factory buildings, high voltage transmission towers, bridges, vehicles, boilers, containers, etc., and also used as a mechanical part with less demanding performance such as less stressed rods, connecting rods, screws, nuts, ferrules, brackets, and stands, etc.

Q235 Steel Equivalent Material