Galvanized steel pipe specification, size theoretical weight table
February 14, 2019
Heavy Weight Drill Pipe (HWDP)
April 9, 2019

Characteristics for grade 20

     Grade :    20   ( 20 )
      Substitute:  15, 25
      Classification :  High quality structural carbon steel
  

 

Chemical composition in % for grade   20   ( 20 )

 

CSiMnNiSPCrCuAs
0.17 – 0.240.17 – 0.370.35 – 0.65max   0.3max   0.04max   0.035max   0.25max   0.3max   0.08

 

Temperature of critical points for grade   20   ( 20 ).

 

Ac1 = 724 ,      Ac3(Acm) = 845 ,       Ar3(Arcm) = 815 ,       Ar1 = 682

 

Mechanical properties under Т=20oС for grade   20   ( 20 )

AssortmentDimensionDirect.sвsTd5yKCUHeat treatment
mmMPaMPa%%kJ / m2
Sheet heat-treatment, GOST 4041-714 – 14 340-490 28   
Pipe hot strain, GOST 550-75  4312552250780 
Pipe, GOST 8731-87  41224521   
Pipe, GOST 10705-80  37222522   
Rolled stock, GOST 1050-88to 80 4102452555 Normalizing
Rolled stock cold-worked , GOST 1050-88  490 740  
Rolled stock annealed , GOST 1050-88  390 2150  
Band annealed , GOST 2284-79  310-540 18   
Band cold-worked , GOST 2284-79  490-830     

 

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