Material Standards:
A53 Grade B (A53 GRB) is American standard steel, mainly used for low pressure gas transmission pipeline, its standard is defined by ASTM.
Q235B is a Chinese standard steel, usually used for making structural supports, mechanical parts, etc. Its specific standard is defined by GB/T 11251-2009.
Chemical composition and strength:
Chemical composition of A53 Grade B steel pipe (%)
| composition | C | Mn | P | S | Cr | Ni | Cu | Mo | V | More | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Type S | Min | - | - | - | - | - | - | - | - | - | Cr+Ni+Cu+V≤1 |
| Max | 0.3 | 1.2 | 0.05 | 0.045 | 0.4 | 0.4 | 0.4 | 0.15 | 0.08 |
| composition | C | Mn | P | S | Cr | Ni | Cu | Mo | V | More | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Type E | Min | - | - | - | - | - | - | - | - | - | Cr+Ni+Cu+V≤1 |
| Max | 0.3 | 1.2 | 0.05 | 0.045 | 0.4 | 0.4 | 0.4 | 0.15 | 0.08 |
Mechanical properties of A53 Grade B steel pipe
| Tensile Strength σb Mpa |
Yield Point σs Mpa |
Elongation at break or elongation δ |
|---|---|---|
| ≥415 | ≥240 |
Chemical composition of Q235B steel pipe (%)
| Composition | C | Si | Mn | P | S | Cr | Ni | Cu | As | N |
|---|---|---|---|---|---|---|---|---|---|---|
| Min | - | - | - | - | - | - | - | - | - | - |
| Max | 0.2 | 0.35 | 1.4 | 0.045 | 0.045 | 0.3 | 0.3 | 0.3 | 0.08 | 0.008 |
Mechanical properties of Q235B steel pipe
| Thickness(calibre) t(d) mm |
Tensile Strength σb Mpa |
Yield Point σs Mpa |
Elongation at break or elongation δ % |
Impact absorbed energy KV2 J |
|---|---|---|---|---|
| ≤16 | 370~500 | ≥235 | ≥26 | ≥27 |
| ＞16～40 | 370~500 | ≥225 | ≥26 | ≥27 |
| ＞40～60 | 370~500 | ≥215 | ≥25 | ≥27 |
| ＞60～100 | 370~500 | ≥215 | ≥24 | ≥27 |
| ＞100～150 | 370~500 | ≥195 | ≥22 | ≥27 |
| ＞150～200 | 370~500 | ≥185 | ≥21 | ≥27 |
Uses:
A53 Grade B is mainly used in the pipelines for the transmission of common fluids such as gas, water and oil.
Q235B is widely used in construction, machinery manufacturing and other fields, such as making structural parts of bridges, vehicles and ships.
Performance Applications:
As A53 Grade B pipelines often need to withstand certain pressure, the product standards for its manufacturing pipelines have high requirements on the impact toughness and brittle fracture resistance of the material.
As a structural steel, Q235B has a low design strength, but has good ductility and welding properties, suitable for a variety of welding processes.
GNEE A53 GRB Seamless Pipe for Sale
