United States · API

C95

API 5CT — Specification for casing and tubing

Chemical composition

wt% · log scale
0.010.1110C0.45Mn1.9P0.03S0.03Si0.45
  • min – max range
  • typical value

Mechanical properties

value range by condition
Yield strength Rp0.2655 MPaTensile strength Rm724 MPaImpact energy Kv/Ku15 JElongation A18 %Yield strength Rp0.2655 MPaTensile strength Rm724 MPaImpact energy Kv/Ku30 JElongation A18 %

Chemical composition

ElementminmaxSimilarRemarks
C0.45
Mn1.9
P0.03
S0.03
Si0.45

Mechanical properties

Heat treatment / conditionYield strengthTensile strengthElongationReduction of areaImpact energyHardness
steel tubes, bars, forgings, quenched and tempered655 758.007241815；30