- Guaranteed Secure Payments on Every Order
- Refund if your item is not delivered or as described
- Buyer Protection after order confirmation
- Place of Origin: CANGZHOU
- Brand Name: xinlian
- Model Number: 1
Standard of implementation： Chinese GB/T8163
Application: used in conveying water, oil, gas and other fluids
Major grade grades: Grade10, 20 (negotiated, can also supply other special grade of steel tube. Accept the special requirements of the customer orders, such as the implementation of Q/320204AAAE02-2006 standard enterprise standard mechanical piping)
- Place of Origin: CANGZHOU
- Brand Name: xinlian
- Model Number: 1
Chemical composition and mechanical properties：
Standard | Steel grade | Chemical constituents (%) | ||||||
C | Mn | Si | Cr | Ni | Cu | P.S | ||
GB/T8163 | 10 | 0.07～0.13 | 0.35～0.65 | 0.17～0.37 | ≤ 0.15 | ≤ 0.30 | ≤ 0.25 | ≤ 0.030 |
20 | 0.17～0.23 | 0.35～0.65 | 0.17～0.37 | ≤ 0.25 | ≤ 0.25 | ≤ 0.25 | ≤ 0.030 | |
Q345 | 0.12～0.20 | 1.20～1.60 | 0.20～0.55 | ≤ 0.030 | ||||
Mechanical properties | Tensile strength (MPa) | Yield strength (MPa) | Elongation(%) | |||||
10 | 335～475 | ≥ 205 | ≥ 24 | |||||
20 | 410～550 | ≥ 245 | ≥ 20 | |||||
Q345 | 490～665 | ≥ 325 | ≥ 21 | |||||
Dimensional tolerance:
Type of steel tube | Steel tube size | Deviation | ||
Ordinary grade | Senior | |||
Hot rolling (extrusion, expansion) tube | Outside diameterD | All | 1%（Minimum 0.50） | - |
Wall thicknessS | All | 15%（Minimum 0.45） | - | |
Cold drawing (rolling) tube | Outside diameterD | 6~10 | 0.20 | 0.15 |
>10~30 | 0.40 | 0.20 | ||
>30~50 | 0.45 | 0.30 | ||
>50 | 1% | 0.8% | ||
Wall thicknessS | ≤1 | 0.15 | 0.12 | |
>1~3 | 15% | 12.5% | ||
>3 | 12.5% | 10% | ||
Note: the outer diameter is not less than 351mm of the thermal expansion tube, the wall thickness allows the deviation of 18% | ||||