Tubular goods mechanical properties

Grade     ​Yield Strength ​ ​Tensile Strength ​Hardness
min psi ​max psi ​min psi ​max HRC
​J-55 ​55000 ​80000 ​75000
​K-55 ​55000 ​80000 ​95000
​VST-55 HCª ​70000 ​100000 ​95000
​N-80 ​80000 ​110000 ​100000
​N-80 HC ​95000 ​110000 ​100000
​L-80 ​80000 ​95000 ​95000 ​23
​L-80 HC ​80000 ​95000 ​95000 ​23
​L-80 HC E ​87500 ​95000 ​95000
​L80 IRP ​80000 ​95000 ​95000 ​23.0
​L80 1Cr ​80000 ​95000 ​95000 ​23.0
​C-90 ​90000 ​105000 ​100000 ​25.4
​C-90 HC ​90000 ​105000 ​100000 ​25.4
​R-95 ​95000 ​110000 ​105000
​T-95 ​95000 ​110000 ​105000 ​25.4
​T-95 HC ​95000 ​110000 ​105000 ​25.4
​T-95 E 100000 ​110000 ​105000 ​25.4
​T-95 HCE 100000 ​110000 ​105000 ​25.4
​C-110 110000 ​120000 ​115000 ​30
​P-110 MS 110000 ​125000 ​125000 ​29
​P-110 110000 ​140000 ​125000
​P-110 ECª 125000 ​​140000 ​135000
​P-110 HC Eª 125000 ​​140000 ​135000
​Q-125 125000 ​150000 ​135000
​Q-125 HC 125000 ​150000* ​135000
​Q-125 HC E 135000 ​150000* ​140000
 
* When manufactured as PSL3, Q125 will have a maximum YS of 140,000 psi.
ª Properties are only valid for products manufactured in the U.S. Mills.
API grades with enhanced performance (EC, HC, HCE, E) are supplied with API couplings produced from standard API grades, unless a premium connection is specified.

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