DIN 2391-1/EN 10305-1

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OD(mm) Wall Thickness Unit(mm)
  2-3 3-4 4-5 5-6 6-7 7-8 8-9 9-10 10-11 11-12 12-16 16-18 18-20 20-24 24-30
Φ20-Φ23 ● ● ● ● ● ●                  
Φ24-Φ36 ● ● ● ● ● ● ● ●              
Φ38-Φ43 ● ● ● ● ● ● ● ● ● ●          
Φ44-Φ60 ● ● ● ● ● ● ● ● ● ●          
Φ61-Φ76     ● ● ● ● ● ● ● ●          
Φ89-Φ114     ● ● ● ● ● ● ● ● ● ● ●    
Φ121-133       ● ● ● ● ● ● ● ● ● ● ●  
Φ140-Φ159       ● ● ● ● ● ● ● ● ● ● ● ●
Φ168-Φ180       ● ● ● ● ● ● ● ● ● ● ● ●

OD(mm)
Wall Thickness Unit(mm)
/
10.5-12
12.5-17
18-20
21-25
26-30
Φ127
●
●
●
●
●
Φ133
●
●
●
●
●
Φ140
●
●
●
●
●
Φ146
●
●
●
●
●
Φ152
●
●
●
●
●
Φ159
●
●
●
●
●
Φ168
●
●
●
●
●
Φ180
●
●
●
●
●

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
Application:

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

Size(mm):

O.D.:6.0-224.0 W.T.:1-15 L:max 12000

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