OCTG Sour Service Steel Grades

OCTG Sour Service Steel Grades

OCTG Sour Service Steel Grades

API L80 is manufactured to API specification 5CT. This is a controlled yield strength material with a hardness testing requirement. L80 is often used in wells with sour (H2S) environments.

API C90 is an API controlled yield strength grade generally for use in sour condensate wells. Extensive hardness testing is required along with Sulfide Stress Corrosion Cracking (SSCC) testing per NACE Standard TM-0177, Method A. The minimum threshold stress required is 80% of specified minimum yield strength.

API T95 is an API controlled yield strength grade, the same as API C95 and USS C95. Generally for use in sour condensate wells. Extensive hardness testing is required along with SSCC testing per NACE Standard TM-0177, Method A. The minimum threshold stress required is 80% of specified minimum yield strength.

API C110 is a controlled yield strength grade generally used in deeper sour condensate wells. SSCC testing is required for each heat to meet a threshold stress of 85% of specified minimum yield strength.

Product	Minimum Yield Strength	Maximum Yield Strength	Minimum Tensile Strength	Maximum Hardness
API L80	80,000 psi	95,000 psi	95,000 psi	23.0 HRC
API C90	90,000 psi	105,000 psi	100,000 psi	25.4 HRC mean
API T95	95,000 psi	110,000 psi	105,000 psi	25.4 HRC mean
API C110	110,000 psi	120,000 psi	115,000 psi	30.0 HRC mean

admin2022-04-25T07:17:27+00:00April 25th, 2022|Industrial Articles|

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