GB/T700 q235b grade steel is a carbon structural steel.
Q235B structural steel is available in the form of plates, wide flats, bars, sections and profiles.
Q235B Steel Symbol:
- The first letter of Chinese pronunciation “屈服(qufu)” in steel yielding point.
A, B, C, D are quality class respectively.
- First letter of Chinese pronunciation “沸(fei)” in rimming steel.
- First letter of Chinese pronunciation “镇(zhen)” in killed steel.
GB/T700 Q235B structural steel chemical composition
| Grade |
C |
Mn |
Si |
S |
P |
|
Q235B |
0.12-0.20 |
0.30-0.70 |
0.30 |
0.045 |
0.045 |
Q235B steel deoxidation: F, Z
GB/T700Q235B structural steel mechanical properties
|
Grade |
Thickness |
Yield strength |
Tensile strength |
Elongation % |
Impacting Test |
|
Temperature |
V |
|
Q235B |
≤16 |
≥235 |
375-500 |
≥26 |
20 |
27 |
|
16-40 |
≥225 |
≥25 |
|
40-60 |
≥215 |
≥24 |
|
60-100 |
≥205 |
≥23 |
|
100-150 |
≥195 |
≥22 |
|
>150 |
≥185 |
≥21 |
Smelting process:
Q235B steel is smelted by oxygen converter or electronic furnace. Unless the buyer has special requirements and has noted them in contract, the smelting process is generally determined by supplier.
State of Delivery
Generally, GB/T700 Q235B structural steel products shall be delivered in hot rolling, controlled rolling or normalizing condition.
