API 5CT Q125 is a steel grade that is a high-strength steel pipe material used in petroleum tubing. Specifically, Q125 refers to a minimum yield strength of 125,000 psi (pounds per square inch). This material is commonly used in oil well tubing for the manufacture of oil casing and tubing to meet the demands of deep and high-pressure wells and to increase safety.API 5CT is a standard for tubing used in the oil and gas industry that covers different types of tubing and their manufacturing requirements.
- Chemical composition of APT 5CT Q125 petroleum casing: C≤0.35%, Mn≤1.35%, Mo≤0.85%, Cr≤1.5%, Ni≤0.99%,P≤0.020%, S≤0.010%;
- API standard Q125 petroleum casing yield strength 862~1034Mpa, Q125 grade seamless alloy steel pipe tensile strength ≥931Mpa;
- API standard Q125 joint material pipe impact work: 0 ℃ impact Transverse Charpy impact ≥ 60J, longitudinal punch ≥ 100J;
