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Precision Steel Tube DIN2391

Standard for seamless precision steel tubes.

Application:
Cold drawn or cold rolled precision seamless steel tubes for hydraulic pressure and pneumatic services.
For Auto. use,machinery use,oil cylinder tube,motorcycle shock reducer use,auto shock reducer inner cylinder,etc.

Details

Size:
O.D.: 6.0-650.0mm W.T.: 1.0-65mm Length: Max.12000mm

Steel Grade and Chemical Composition(%)

 Standard  Grade  C≤  Si≤  Mn  P≤  S≤
 DIN2391  St35  0.18  0.35  ≥0.40  0.025  0.025
 St45  0.22  0.10-0.35  ≥0.40  0.025  0.025
St52 0.22 0.55 ≤1.60 0.025 0.025

Mechanical Properties
Rm:Tensile Strength(Mpa) ReH:Yield Point(Mpa) A%:Elongation Mpa=N/mm2
Standard Grade BK BKW BKS GBK NBK
Rm≥ A%≥ Rm≥ A%≥ Rm≥ ReH≥ A%≥ Rm≥ A%≥ Rm≥ ReH≥ A%≥
DIN2391 St35 480 6 420 10 420 315 14 315 25 340-470 235 25
St45 580 5 520 8 520 375 12 390 21 440-570 235 21
St52 640 4 580 7 580 420 10 490 22 490-630 355 22

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