• DIN 2391 SEAMLESS STEEL TUBE USED FOR MECHANICAL AND AUTOMOBILE
  • DIN 2391 SEAMLESS STEEL TUBE USED FOR MECHANICAL AND AUTOMOBILE
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DIN 2391 SEAMLESS STEEL TUBE USED FOR MECHANICAL AND AUTOMOBILE

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DIN2391 Seamless Steel Tube Used For Mechanical And Automobile

 

The main products of steel / steel grade: DIN2391-1(ST35, ST45, ST52).

Application:

  • for Atuo usd;
  • for machinery use;
  • Oil cylinder tube;
  • Motorcycle shock reducer steel tubes;
  • Auto shock reducer inner cylinder

 

Size:

OD: 25-168mm  WT: 2-12mm

 

Grade and Chemical Composition(%)

Grade

 Chemical Composition(%):
C max Si max Mn P max

S max
St 35 0.17 0.35 ≥0.40 0.025 0.025
St 45 0.21 0.35 ≥0.40 0.025 0.025
St 52 0.22 0.55 ≤1.60 0.025 0.025
Steel grade Chemical Composition(%):
Steel name Steel number C max Si max Mn P max S max Al min
E215 1.0212 0.10 0.05 0.70 0.025 0.025 0.025
E235 1.0308 0.17 0.35 1.20 0.025 0.025 –
E355 1.0580 0.22 0.55 1.60 0.025 0.025 –

 

Mechanical Properties(Mpa)

Steel Grade Minimum values for the delivery condition
Steel Name Steel Number BK BKW BKS GBK NBK
Rm A % Rm A % Rm ReH A % Rm A % Rm ReH A %
Mpa Mpa Mpa Mpa Mpa Mpa Mpa
St 30 Si 1.0211 430 8 380 12 380 280 16 280 30 290 to 420 215 30
St 30 Al 1.0212 430 8 380 12 380 280 16 280 30 290 to 420 215 30
St 35 1.0308 480 6 420 10 420 315 14 315 25 340 to 470 235 25
St 45 1.0408 580 5 520 8 520 375 12 390 21 440 to 570 255 21
St 52 1.0580 640 4 580 7 580 420 10 490 22 490 to 630 355 22

Inspection and test list for the DIN 2391 Standard.

Inspection or test types Test frequency
Internal test Acceptance test
Chemical analysis M M
Tensile testing M One per tested batch
Flattening test or extension test M Two per tested batch
Dimension verification M M
Visual inspection M M
NDT in order to identify leaks Individual Individual

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