High Precision Seamless Bright Tube
Automobiles, machine parts, etc. have high requirements on the precision and finish of steel pipes. The users of precision steel pipes are not only users who have relatively high requirements for accuracy and smoothness. Because the precision of precision bright pipes is high and the tolerance can be maintained at 2--8 wires, many machining users will save labor, material, and time loss. Seamless steel tubes or round steel are slowly being transformed into precision bright tubes.
One: Known seamless bright tube outer diameter, specification, wall thickness to be able to bear the pressure calculation method (the tensile strength of different steel pipe materials is different)
Pressure = (wall thickness * 2 * steel pipe material tensile strength) / (outer diameter * coefficient)
Two: Known seamless pipe outer diameter of seamless steel pipe and calculation method of wall thickness under pressure:
Wall thickness = (pressure * outer diameter * coefficient) / (2 * steel pipe material tensile strength)
Three: The method of expressing the pressure coefficient of seamless bright tube:
Steel pipe pressure P<7Mpa coefficient S=8
7<steel pressure P<17.5 coefficient S=6
Steel pipe pressure P>17.5 coefficient S=4
| Brand | Delivery Status | |||||
| Cold Working/Hard (y) | Cold Working/Soft (r) | Stress Relief Annealing (t) | ||||
| Ób≥/Mpa | δ 5≥(%) | Ób≥/Mpa | δ5≥(%) | Ób≥/Mpa | δ5≥(%) | |
| 10 | 410 | 6 | 375 | 10 | 335 | 12 |
| 20 | 510 | 5 | 450 | 8 | 430 | 10 |
| 30 | 590 | 4 | 550 | 6 | 520 | 8 |
| 45 | 645 | 4 | 630 | 5 | 610 | 7 |
