DIN 2391 Cold Drawn or Cold Rolled Steel Tube

DIN 2391 standard specifies the Seamless steel tubes used forMechanical and Automobile.

Cold Drawn Seamless Carbon Steel Tube ASTM A179

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
DIN2391 ST52 Seamless Honed Tube
DIN2391 ST52 Seamless Honed Tube

Read more:

Features Specifications
OD(mm)  Wall Thickness Unit(mm)
2 2.5 3 3.5 4 4.5 5 6 6.5-7 7.5-8 8.5-9 9.5-10 11 12
Φ25-Φ28                
Φ32                
Φ34-Φ36                
Φ38                
Φ40                  
Φ42                  
Φ45                
Φ48-Φ60              
Φ63.5              
Φ68-Φ73                
Φ76        
Φ80        
Φ83        
Φ89        
Φ95        
Φ102        
Φ108        
Φ114          
Φ121          
Φ127          
Φ133          
Φ140            
Φ146            
Φ152            
Φ159            
Φ168            
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

JIS Number and Corrensponding Foreign Standards (DIN2391)

 
JIS
ASTM
BS
DIN
NF
ISO

Index Number

Standard Number

Grade

Tupe

Standard Number

Grade

Tupe

Standard Number

Grade

Tupe

Standard Number

Grade

Tupe

Standard Number

Grade

Tupe

Standard Number

Grade

Tupe

G3445
STKM11A
C
A512
MT1010
C
1717
ERWC1
C
2391
St30Si
C
3304
R28
C
C017
A513
MT1010
C
St30A1
C
3305
"
C
2393
St28
C
3306
"
C
RSt28
C
2394
St28
C
USt28
C
RSt28
C
STKM12A
C
A512
MT1015
C
1717
ERWC2
C
2391
St37-2
3304
R33
C
A513
MT1015
C
6323
HFS3
C
RSt37-2
3305
"
"
STKM12B
C
A512
MT1015
C
2394
St37-2
3306
"
"
A513
MT1015
C
Ust38-2
A519
MT1015
C
RSt-2
STKM12C
C
1717
CEWC2
C
A49-322
TU37b
C
"
CFSC3
C
A49-327
TU37b
C
6323
CFS3
C
"
CFS3A
C
STKM13A
C
A312
MT1020
C
1717
ERWC3
C
2391
St45
C
A49-324
TU37b
C
2937
TS4
C
A513
MT1020
C
2393
St44-2
C
A49-330
TU37b
C
3304
R37
"
2394
St44-2
C
A49-343
TU38b
C
3305
"
"
STKM13B
C
A513
MT1020
C
3306
"
"
STKM13C
C
1717
CEWC3
C
"
CFSC4
C
6323
CFS4
C
STKM14A
C
A513
MT1020
C
6323
HFS4
C
2937
TS9
C
3304
R42
"
STKM14B
C
6323
HFS5
C
3305
R42
C
STMK14C
C
3306
"
"
STKM15A
C
A513
1030
C
A519
1030
C
STKM15C
STKM16A
C
A519
1040
C
A49-311
TUXC35
C
A49-312
TUXC35
C
STKM16C
C
STKM17A
C
A519
1050
C
6323
HFS8
C
STKM17C
C
6323
CFS8
C
STKM18A
C
A519
1518
C
1717
ERWC5
C
A49-310
TU52b
C
A49-311
TU52b
C
A49-312
TU52b
C
STKM18B
C
A49-321
TU52b
C
A49-323
TU52b
C
A49-326
TU52b
C
STKM18C
C
A49-330
TU52b
C
A49-341
TS42a
C
"
TS47a
C
A49-343
TS18M5
C
STKM19A
C
A519
1524
C
2391
ST52
C
2937
TS18
C
2393
ST52-3
C
2938
Gr.1
C
2394
ST52-3
C
3304
R50
C
3305
R50
C
3306
R50
C
STKM20A
C


Tech & Service of Seamless pipe

Seamless pipes are extensively applied for the nuclear device, gas, petrochemical, ship building and boiler industries. Seamless pipes dominates 65% of market share in Chinese boiler industry.

How to make seamless pipe(seamless pipe process)?
Hot Piercing Workshop
Piercing process
The cross roll piercing and pilger rolling process in the size range from approx. 250 to 660 mm outside diameter.
Precision cold drawn steel tube production process
Pipe weld cracks
often follow different mechanisms can be divided into two types of thermal cracking and cold cracking.
How to calculate a steel pipe and tube theoretic weight
Calculate a steel pipe?
Pipe fittings are necessary to join together pipes, or to change the direction of an existing pipe.
Pipe beveling
Pipe beveling is the process where an angle is formed between the edge of the end of a pipe or tube and a plane perpendicular to the surface.
Steel pipe cutting machine
Pipe cutting
Cutting tools have a grinding wheel piece cutting machine (also known as toothless saw), hand saw, cutter and other hand tools.
Packing the steel pipes
There are probably hundreds of different methods for packing a pipe, and most of them have merit, but there are two principles that are vital for any method.


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