Q235B Steel Properties And Introduction

Q235 Steel Properties and Introduction

Q235 steel is a Chinese GB standard plain carbon structural steel, and divided into 4 quality grades: Q235A, Q235B, Q235C and Q235D, material density is 7.85 g/cm3, tensile strength is from 370 to 500 MPa, and yield strength is 235 MPa (tested with 16mm diameter steel bar or steel plate). "Q" is the first letter of Chinese spelling of "qu fu dian", which means Yield Point, "235" refers to 235 MPa. The latest standard of steel Q235 is GB/T 700 2006.

Features and Applications

Q235 steel has good plasticity, toughness and weldability, as well as a certain strength, good cold bending performance. Q235 material is usually 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 material equivalent to US ASTM, ISO, European EN, Germany DIN EN, British BS EN, France NF EN, Janpanese JIS Standard.

Q235 India equivalent is E250, Indian standard is IS 2062.

S235JRG2 and S235J2G4 are old designations in EN 10025:1993, S235JRG2 is replaced by the new designation S235JR(1.0038), and S235J2G4 replaced by S235J2(1.0117) in EN 10025-2:2004.