Over View of Q235 and ss400 steel Specification
Q235 steel is equivalent to Japenese steel grade SS400 in application, the only difference is that ss400 steel requires only S,P composition < 0.050, Q235 has requirements for More element C, Si, Mn, S, P. Yield strength of q235 is >235Mpa, which is almost the same to SS400 245Mpa. Q represents the yield of this material, the latter 235, refers to the yield value of this material, at about 235MPA. With the increase of the thickness of steel plate, the yield value decreases. It is widely used in construction and engineering structures.
Below are Q235A, Q235B, Q235C & Q235D physical properties, chemical composition and equivalent.
Steel Plate Chemical Composition of Q235A,B,C,D
| Steel Grade | Quality Grade | C % (≤) | Si % (≤) | Mn (≤) | P (≤) | S (≤) |
|---|---|---|---|---|---|---|
| Q235 | Q235A | 0.22 | 0.35 | 1.4 | 0.045 | 0.05 |
| Q235B | 0.2 | 0.35 | 1.4 | 0.045 | 0.045 | |
| Q235C | 0.17 | 0.35 | 1.4 | 0.04 | 0.04 | |
| Q235D | 0.17 | 0.35 | 1.4 | 0.035 | 0.035 | |
| Quality Grade: A<B<C<D | ||||||
Steel Plate Mechanical Properties of Q235 A,B,C,D
| Grade | Yield Strength | Tensile Strength | Elongation % | |||
|---|---|---|---|---|---|---|
| Q235 Steel | 235 Mpa | 370-500 Mpa | 26 | |||
| Test Sample:16mm steel bar, (Mpa=N/mm2) | ||||||
Q235 Steel Equivalent Standard
| China | USA | Germany | Japanese | France | UK | ISO |
|---|---|---|---|---|---|---|
| GB | ASTM | DIN | JIS | NF | BS | ISO |
| Q235A Steel |
Gr.D (σS230MPa) |
Ust37-2 RSt37-2 |
SS440 SM400A (σS245MPa) |
080A15 (σS235MPa) | E235B (σS235MPa) | |
| Q235B Steel |
Gr.D (σS230MPa) |
S235JR S235JRG1 S235JRG2 (σS235MPa) |
SS440 SM400A (σS245MPa) |
S235JR S235JRG1 S235JRG2 (σS185MPa) |
080A15 S235JR S235JRG1 S235JRG2 (σS185MPa) |
E235B (σS235MPa) |
| Q235C Steel |
Gr.D (σS230MPa) Gr.65 (σS240MPa) |
S235JO (σS235MPa) |
SM400A SM400B (σS245MPa) |
S235JO (σS235MPa) |
080A15 S235JO (σS235MPa) |
E235C (σS235MPa) |
| Q235D Steel |
Gr.D (σS230MPa) |
S235J2G3 S235J2G4 (σS235MPa) |
SM400A (σS245MPa) |
S235J2G3 S235J2G4 (σS235MPa) |
S235J2G3 S235J2G4 (σS235MPa) |
E235D (σS235MPa) |
