Q235 Steel Q235A Q235B Q235C Q235D Equivalent, Properties, Specification, Composition

Steel plate Q235 steel Q235A Q235B Q235C Q235D
Steel plate made from Q235 steel

Q235 Steel (Q235A Q235B Q235C Q235D)

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; yield strength is 235 MPa (data are for steel bar or steel plate diameter ≤ 16mm). The latest standard of steel Q235 is GB/T 700 – 2006.

Meaning and Designation

“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.

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.

Steel wire rod made from Q235 steel
Steel wire rod made from Q235 steel in accordance with “GB/T 701 – Hot rolled carbon steel wire rods”

Data Sheet and Specification

The following tables show Q235A, Q235B, Q235C and Q235D steel datasheet and specification, including chemical composition, mechanical properties and equivalents.

Q235A, Q235B, Q235C, Q235D Steel Chemical Composition

The table below lists Q235 material chemical composition based on heat analysis.

Chemical Composition (heat analysis), %, ≤
Steel GradeQuality GradeCSiMnPSDeoxidation Method
Q235Q235A0.220.351.400.0450.050Rimmed / Killed
Q235B0.200.351.400.0450.045Rimmed / Killed
Q235D0.170.351.400.0350.035Exceptionally Killed

Q235 Steel Properties

The following list summarizes Q235 steel properties including physical and mechanical properties.

Physical Properties


  • 10-6·K-1 = 10-6/K
  • 1 Ω·mm²/m = 1 μΩ·m
  • 1 g/cm3 = 1 kg/dm3 = 1000 kg/m3
  • 1 GPa = 1 kN/mm2
  • 1 MPa = 1 N/mm2
Physical Properties
Density, g/cm37.85
Melting point, ℃about 1493
Specific heat capacity, J/(Kg·K)470 at 20 ℃
Electrical resistivity, μΩ·mabout 0,15 (20 ℃)
Elastic modulus, GPa (kN/mm2)200
Thermal conductivity, (W/m·K)53-49 (0-100 ℃)
Coefficient of thermal expansion, (10-6/K)11.3-11.6 (20 ℃)
Young’s modulus, GPa (kN/mm2)200
Poisson’s ratio0.24-0.28

Mechanical Properties

Yield strength and tensile strength are listed in the table below.

1 MPa = 1 N/mm2

Yield Strength (≥ MPa); Thickness or Dia. (d) mmTensile Strength (MPa)
Steel GradeQualityd≤1616< d ≤4040< d ≤100100< d ≤150150< d ≤200d≤100
Q235Q235A235225215195185370 – 500

Minimum Elongation

Elongation (≥ %); Thickness or Dia. (d) mm
Steel Graded≤4040< d ≤6060< d ≤100100< d ≤150150< d ≤200

Minimum Charpy Impact

Charpy impact (V notch)
Steel GradeQualityTemp. ℃Impact energy (longitudinal, ≥ J)

Bending Test Results of Q235 Material

Cold Bending Test 180° (B=2a)
GradeSample OrientationSteel Dia. (d) of Curve Center
d≤ 60mm60<d≤100 mm

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.

Q235 Steel Equivalent

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.

You may be interested in Q235 vs A36, SS400, S235JR & E250 Steel;

Q235 vs Q195, Q215 and Q275 Steel

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.

Q235 steel equivalent grades
ChinaUSGermanyBritain (UK)JapanFranceISO
StandardGradeStandardGradeStandardGrade (Steel Number)StandardGrade (Steel Number)StandardGradeStandardGrade (Steel Number)StandardGrade
GB/T 700Q235AASTM A36/A36M;
ASTM A283/A283M
A36 steel;
Grade D
BS 970 Prat 1080A15JIS G 3101;
JIS G 3106
GB/T 700Q235BASTM A36;
ASTM A283/A283M
Grade D
DIN EN 10025-2S235JR (1.0038)BS EN 10025-2S235JR
JIS G3101;
JIS G3106
NF EN 10025-2S235JR (1.0038)
GB/T 700Q235CASTM A36;
ASTM A283/A283M;
ASTM A573/A573M
Grade D;
Grade 58
DIN EN 10025-2S235J0 (1.0114)BS EN 10025-2S235J0 (1.0114)JIS G3106SM400A,
NF EN 10025-2S235J0 (1.0114)ISO 630-2S235B
GB/T 700Q235DASTM A36;
Grade D
DIN EN 10025-2S235J0 (1.0114); S235J2 (1.0117)BS EN 10025-2S235J0 (1.0114); S235J2 (1.0117)JIS G3106SM400ANF EN 10025-2S235J0 (1.0114); S235J2 (1.0117)ISO 630-2S235B,

Tags: Q235A steel, Q235B steel, Q235C steel, Q235D steel



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