Current time:
Tel:0086-317-6813780

Products Details

Current Location :Home > Products
Seamless steel pipe for fluid transport

 

 

 

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)

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

mm

Deviation

Ordinary grade

Senior

Hot rolling (extrusion, expansion) tube

Outside diameterD

All

+1%(Minimum+0.50

-

Wall thicknessS

All

+15%(Minimum+0.45

-12.5%(Minimum-0.40

-

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%

-10%

+12.5%

-10%

>3

+12.5%

-10%

+10%

Note: the outer diameter is not less than 351mm of the thermal expansion tube, the wall thickness allows the deviation of +18%