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Standard: GB/T 8163 Seamless steel pipe for conveying fluid
Steel grade: 10#, 20#, Q295, Q345
Out-diameter: 4mm-80mm
Wall thickness: 0.5mm-13mm
Application: For conveying fluid
Technology: Cold-drawn
Longitudinal mechanical properties of steel pipe | ||||
Steel grade |
Tensile Strength MPa |
Yield Strength MPa |
Elongation % |
|
s≤16mm |
s＞16mm |
|||
Not exceed than | ||||
10 |
335~475 |
205 |
195 |
24 |
20 |
410~550 |
245 |
235 |
24 |
Q295 |
430-610 |
295 |
285 |
22 |
Q345 |
490~665 |
325 |
315 |
21 |
Tube diameter expansion rate | |||
Steel grade |
Tube diameter expansion rate,% |
||
Inner diameter /Out diameter | |||
≤0.6 |
＞0.6~0.8 |
＞0.8 |
|
Premium carbon steel |
10 |
12 |
17 |
Low-alloy steel |
8 |
10 |
15 |
Steel Tube Test items | ||
Test items |
Test method |
Number of samples |
chemical composition |
GB/T 222 GB/T 223 |
Take 1 sample per furnace |
tensile test |
GB/T 228 |
Take one sample on two steel pipes in each batch |
Flattening test |
GB/T 246 |
Take one sample on two steel pipes in each batch |
Flaring test |
GB/T 242 |
Take one sample on two steel pipes in each batch |
Bending test |
GB/T 244 |
Take one sample on two steel pipes in each batch |
Hydraulic test |
GB/T 241 |
Test one by one |
Eddy current flaw detection |
GB/T 7735 |
Test one by one |
Ultrasonic flaw detection |
GB/T 5777 |
Test one by one |
Magnetic flux leakage inspection |
GB/T 12606 |
Test one by one |
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