Q215 Steel, Q215A, Q215B Chemical Composition, Properties & Equivalent

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Q215 Mild Steel

Q215 steel is a Chinese carbon structural steel, divided into 2 quality grades: Q215A and Q215B, material density is 7.85 g/cm3. “Q” is the first letter of Chinese spelling of “Qu Fu Dian”, translated as Yield Strength, “215” is a abbreviation for the unit value “215 MPa”, the tensile strength is 315-430 N/mm2, technical specifications are tested with 16mm diameter steel bars or steel plates.

The latest standard of Q215 steel is GB/T 700-2006, the chemical composition and physical properties are equivalent to ASTM A283/A283M Grade C, ASTM A1011/A1011M CS Type B; JIS G3101 SS330, JIS G3131 SPHC.

For Q215 material main characteristics and uses, please refer to Q195.

Q215 Chemical Composition

Chemical Composition %
Steel Grade Steel Grade C (≤) Si (≤) Mn (≤) P (≤) S (≤) Deoxidation
Q215 Q215A 0.15 0.35 1.2 0.045 0.050 Rimmed / Killed
Q215B 0.15 0.35 1.2 0.045 0.045

Quality Grade: A < B < C < D

Q215 Steel Mechanical Properties

Steel Grade Quality Yield Strength (≥N/mm2) Tensile Strength (N/mm2) Elongation (≥%) Impact Test (V notch)
Thickness or Dia. Ø mm Thickness or Dia. Ø mm Temp. ℃ Absorbed Energy (Vertical, ≥J)
Ø ≤16 16 < Ø ≤ 40 40 < Ø ≤ 60 60 < Ø ≤ 100 100 < Ø ≤ 150 150 < Ø ≤ 200 Ø ≤40 40 < Ø ≤ 60 60 < Ø ≤ 100 100 < Ø ≤ 150 150 < Ø ≤ 200
Q215 Q215A 215 205 195 185 175 165 335 – 450 31 30 29 27 26
Q215B +20 27

Q215 Steel Bending Test Results

Cold Bending Test 180° (B=2a)
Grade Sample Orientation Steel Ø of Curve Center
≤ 60mm 60 < Ø ≤ 100
Q215 Vertical 0.5a 1.5a
Horizontal a 2a
B= Sample Steel Width; a= Sample Diameter or Thickness

Q215 Equivalent

Q215 steel equivalent to US ASTM, Japan JIS, UK BSI Standards

You may also be interested in Q215 vs Q195, Q235 and Q275 Steel

Equivalent (For reference)
China USA Japan UK
Standard Grade Standard Grade Standard Grade Standard Grade
GB/T 700 Q215A ASTM A283/A283M;
ASTM A1011/A1011M
Grade C;
CS Type B
JIS G3101;
JIS G3131
SS330;
SPHC
BS 970-1 040A12
Q215B ASTM A283/A283M;
ASTM A1011/A1011M
Grade C;
CS Type B
JIS G3101
JIS G3131
SS330;
SPHC
BS 970 Prat 1 040A12

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