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DIN 2391-81 Part 2 Seamless precision steel tubes

DIN 2391-81 Part 2 defines the technical delivery conditions for seamless precision steel tubes according to DIN 2391 Part 1 which are made from the steel grades listed in section 5.
HYST QCCO China Steel offers an extensive range of seamless precision steel tubes.
Application:
for Atuo usd
for machinery use
Oil cylinder tube
Motorcycle shock reducer steel tubes
Auto shock reducer inner cylinder
 
GB/T 3639 Cold drawn or cold rolled precision seamless steel tubes
GB/T 8713 inside precision seamless tubes for hydraulic pressure and pneumatic services

Size(mm): O.D.:6.0-224.0 W.T.:1-15 L:max 12000
Material Comparison Tables (ASTM →KS, JIS, DIN, BS, NBN, NF, UNI)
DIN 2391-81 Part 2 Seamless Precision steel tubes
DIN 2391-81 Part 2 Seamless Precision steel tubes
JIS Number and Corrensponding Foreign Standards (DIN2391)
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
BK BKW BKS GBK NBK
RmN/mm
min
min RmN/mm
min
min N/mm
min
ReH
N/mm
min
min N/mm
min
min N/mm
min
ReH
N/mm
min
min
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

 

Steel grade Minimum values for the delivery condition
Steel name Steel number + C + LC + SR + A + N
Rm Mpa A% Rm Mpa A% Rm Mpa ReH Mpa A% ReH Mpa A% Rm Mpa ReH Mpa A%
E215 1.0212 430 8 380 12 380 280 16 280 30 290-430 215 30
E235 1.0308 480 6 420 10 420 350 16 315 25 340-480 235 25
E355 1.0580 640 4 580 7 580 450 10 450 22 490-630 355 22
JIS Number and Corrensponding Foreign Standards
DIN 2391-81 Part 2 SEAMLESS PRECISION STEEL TUBES (DIN2391-81)

Another kinds of production:


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