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, tensile strength is 370-500 MPa; yield strength is 235 MPa (data are for steel bar or steel plate diameter ≤ 16mm). Since it’s mild steel, it is used directly without heat treatment.
"Q" is the first letter of Chinese spelling of "Qu Fu Dian", which means Yield Point.
"235" refers to the minimum yield strength 235 MPa tested with steel diameter ≤ 16mm.
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.
The following tables show Q235A, Q235B, Q235C and Q235D steel datasheet and specification, including chemical composition, physical and mechanical properties, etc.
The table below lists Q235 material chemical composition based on heat analysis.
The following list summarizes Q235 steel properties including physical and mechanical properties.
Yield strength and tensile strength are listed in the table below.
1 MPa = 1 N/mm2
Minimum Charpy Impact
B= Sample Steel Width; a= Sample Diameter or Thickness.
Steel rolled with Q195 and Q235B grade rimmed steel, the thickness or diameter of which is not more than 25mm.
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 since 2004.
Q235 material equivalent to ASTM, ISO, European EN (German DIN EN, British BS EN, French NF EN…), Japanese JIS standard.
Note: Q235 India equivalent is E250 in Indian standard IS 2062.
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