DIN2391 Seamless Precision Steel Tube

DIN2391 Seamless Precision Steel Tube
DIN 2391 standard specifies theSeamless Precision Steel Tube used for Mechanical and Automobile.
Carbon steel tubes for machine structural purposes .
Standard:
  • DIN2391-1: Seamless Precision Steel Tube.
  • EN 10305-1: Steel tubes for precision applications.
Size (mm):
  • Outer Dimensions: 4.0mm-60.0mm
  • Wall Thickness: 0.5mm-8 mm
  • Length: max 6000mm
Application:
  • motor-car construction
  • pneumatic
  • hydraulic operating mechanisms
Steel grade:
  • DIN2391-1 ST35
  • DIN2391-1 ST45
  • DIN2391-1 ST52

Delivery Condition:

  • GBK, BKS, BK, BKW, NBK

Inspection and Test:

  • Chemical Composition, Mechanical Properties
  • Visual and Dimension Test
  • NDT
  • Grain Size Test

Surface treatment:

  • Oil-dip, Varnish, Shot Blasting

Packing:

  • Inner packing:Caps on two ends of every pipe
  • Packing: Bare/bundles/crates/crate protection at the both sides of tubes or as per customers’ requirements .
  • Surface treatment:Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting.
  • Marking: as per customers requirement

DIN2391-1: Chemical compositions(%)

GradeCSiMnPS
DIN2391 ST35≤0.17≤0.35≥0.40≤0.050≤0.050
DIN2391 ST45≤0.21≤0.35≥0.40≤0.050≤0.050
DIN2391 ST52≤0.22≤0.55≥1.60≤0.050≤0.050

DIN2391-1: Mechanical properties

GradeBKBKWBKSGBKNBK
Rm
N/mm
min
minRm
N/mm
min
minN/
mm
min
ReH
N/mm
min
minN/
mm
min
minN/mm
min
ReH
N/mm
min
min
DIN2391 ST354806420104203151431525340-47023525
DIN2391 ST45580552085203751239021440-57023521
DIN2391 ST52640458075804201049022490-63035522

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