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DIN2391 Seamless Steel Tube

DIN2391 Seamless Steel Tube

Metal Pipes

DIN 2391 standard specifies the Seamless steel tubes used forMechanical and Automobile. The main products of steel / steel grade: DIN2391-1(ST35, ST45, ST52).

Carbon steel tubes for machine structural purposes.

Standard:

  • DIN2391-1: Seamless Precision Steel Tube.
  • EN 10305-1: Steel tubes for precision applications – Technical delivery conditions – Part 1: Seamless cold drawn tubes.

Size (mm):

  • Outer Dimensions: 4.0mm – 60.0mm
  • Wall Thickness: 0.5mm – 8 mm
  • Length: max 6000mm

Application:motor-car construction, pneumatic and hydraulic operating mechanisms .
Steel grade:

  • DIN2391-1 ST35
  • DIN2391-1 ST45
  •  DIN2391-1 ST52

Packing: Bare/bundles/crates/crate protection at the both sides of tubes or as per customers requirements.

DIN2391-1: CHEMICAL COMPOSITIONS(%)

Grade C Si Mn P S
ST35 ≤0.17 ≤0.35 ≥0.40 ≤0.050 ≤0.050
ST45 ≤0.21 ≤0.35 ≥0.40 ≤0.050 ≤0.050
ST52 ≤0.22 ≤0.55 ≥1.60 ≤0.050 ≤0.050

DIN2391-1: MECHANICAL PROPERTIES

Grade BK BKW BKS
RmN/mmmin min RmN/mmmin min N/mmmin ReHN/mmmin min
ST35 480 6 420 10 420 315 14
ST45 580 5 520 8 520 375 12
ST52 640 4 580 7 580 420 10

 

Grade GBK NBK
N/mmmin min N/mmmin ReHN/mmmin min
ST35 315 25 340-470 235 25
ST45 390 21 440-570 235 21
ST52 490 22 490-630 355 22

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