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

1
Steel plate made from Q235 steel
Steel plate made from Q235 steel

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.

Steel wire rod made from Q235 steel
Steel wire rod made from Q235 steel

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

Table-1, Q235A, Q235B, Q235C, Q235D Steel Chemical Composition

Q235 Steel Chemical Composition %
Steel GradeQuality GradeC (≤)Si (≤)Mn (≤)P (≤)S (≤)Deoxidation Method
Q235Q235A0.220.351.400.0450.050Rimmed / Killed
Q235B0.200.351.400.0450.045Rimmed / Killed
Q235C0.170.351.400.0400.040Killed
Q235D0.170.351.400.0350.035Exceptionally Killed

Table-2, Q235 Mechanical Properties

Steel GradeQualityYield Strength (≥ N/mm2)Tensile Strength (N/mm2)Elongation (≥%)Impact Test (V notch)
Thickness or Dia. Ø mmThickness or Dia. Ø mmTemp. ℃Absorbed Energy (Vertical, ≥J)
Ø ≤1616 < Ø ≤4040 < Ø ≤6060 < Ø ≤100100 < Ø ≤150150 < Ø ≤200Ø ≤4040 < Ø ≤6060 < Ø ≤100100 < Ø ≤150150 < Ø ≤200
Q235Q235A235225215205195185370 – 5002625242221
Q235B+2027
Q235C0
Q235D-20

Table-3, Bending Test Results of Q235 Material

Cold Bending Test 180° (B=2a)
GradeSample OrientationSteel Ø of Curve Center
≤ 60mm> 60-100 mm
Q235Verticala2a
Horizontal1.5a2.5a

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.

Table-4, Q235 Steel Equivalent

Q235 material equivalent to US ASTM, ISO, European EN, Germany DIN EN, British BS EN, France NF EN, Japanese 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.

You may also be interested in Q235 vs A36, SS440, S235JR & E250 Steel
Q235 vs Q195, Q215 and Q275 Steel

Q235 steel equivalent grades
ChinaUSAGermanyBritain (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
SS440;
SM400A
GB/T 700Q235BASTM A36;
ASTM A283/A283M
A36;
Grade D
DIN EN 10025-2S235JR (1.0038)BS EN 10025-2S235JR
(1.0038)
JIS G3101;
JIS G3106
SS440;
SM400A
NF EN 10025-2S235JR (1.0038)
GB/T 700Q235CASTM A36;
ASTM A283/A283M;
ASTM A573/A573M
A36;
Grade D;
Grade 58
DIN EN 10025-2S235J0
(1.0114)
BS EN 10025-2S235J0 (1.0114)JIS G3106SM400A,
SM400B
NF EN 10025-2S235J0 (1.0114)ISO 630-2S235B
GB/T 700Q235DASTM A36;
ASTM A283M
A36;
Grade D
DIN EN 10025-2S235J0 (1.0114)BS EN 10025-2S235J0 (1.0114)JIS G3106SM400ANF EN 10025-2S235J0
(1.0114)
ISO 630-2S235B,
S235C

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

1 COMMENT

LEAVE A REPLY

Please enter your comment!
Please enter your name here