DIN2391 Seamless Tube

Difference Between Precision Seamless Tube and Seamless Steel Tubes
1.The main characteristics of Seamless Steel Tubes is without welding seam,it can withstand greater pressure.The products can be very rough cast or cold call.
2.Precision Seamless Tube appears in recent years,It has tight tolerances and roughness in the hole and outer dementions.
The Features of Precision Precision Seamless Tube
1.Smaller diameter.
2.High precision in physical property
3 High finished products with good surface quality.
4 Steel Cross area is more complex.
5 Superior performance,the metal is relatively dense.
DIN2391 Seamless Tube is kind of precision seamless tube,it has high requirements in physical proerties,Inner and outer diameter can be accurate to within 0.2mm.

Details of DIN2391 Seamless Tube

Commodity  Name DIN2391 Seamless Tube
Standard DIN2391 
O.D. 16mm-325mm
W.T. 1mm-22mm
Length Max 14000
Material ST35,ST45,ST52
Brand Name Zhonghai
Usage 

hydraulic equipment, high pressure tubing, hydraulic tubing, fittings, pipe joints, 

rubber machinery,forging machinery, die casting machinery, construction machinery, 

concrete pump with high-pressure steel pipe

Payment Terms T/T ,L/C

Chemical Properties and Physical Properties of DIN2391 Seamless Tube

Grade Chemical Properties(%)
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 BK BKS

Tensile Strength

 Rm

Elongation           

 %

Tensile Strength 

Rm

Yield Strength

Elongation       

 %

Tensile Strength 

Rm

ReH   N/mm
N/mm   N/mm N/mm    
min min min min min min
St35 480 6 420 315 14
St45 580 5 520 375 12
St52 640 4 580 420 10
Steel Grade  GBK NBK

Tensile Strength

 Rm

Elongation     

   %

Tensile Strength  

Rm

Yield Strength

Elongation       

%

Tensile Strength

 Rm

  N/mm ReH    
N/mm     N/mm    
min min min min min min
St35 315 25 340-470 235 25
St45 390 21 440-570 255 21
St52 490 22 490-630 355 22

 


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