nahtlose Öl Stahlrohr

Variety    

Diameter                

Thickness              

Cold-drawn tube

Diameter (mm)

Tolerance on Dimension (mm)  

Tolerance on Dimension (mm)    

< 114.3  

±0.79                

- 12.5 %              

Grade    

Chemical Composition(%) (%)                                  

C      

Si    

Mn  

P  

S  

Cr

Ni

Cu

Mo

V    

J55K55(37Mn5)

0.34 ~0.39

0.20 ~ 0.35

1.25 ~1.50

≤0.020

≤0.015

≤0.15

≤0.20

≤0.20

    -      

N80(36 Mn2V)

0.34 ~0.38

0.20 ~ 0.35

1.45 ~1.70

≤0.020

≤0.015

≤0.15

  -  

  -  

0.11~0.16

Standard      

Grade      

Tensile Strength ( MPa )  

Yield Strength ( MPa )  

Elongation (%)    

Hardness  

API SPEC 5CT

J55      

≥517        

379 ~ 552  

0.5    

K55        

≥517    

≥655      

0.5      

N80          

≥689      

552 ~ 758  

0.5      

L80(13Cr)    

≥655      

552 ~ 655  

0.5      

≤241HB  

P110          

≥862      

758 ~ 965    

0.6