OCTG Tubing, API 5CT Tubing
Chemical Composition of OCTG Tubing
a. The carbon content for L80 may be increased up to 0,50 % maximum if the product is oil-quenched.
b. The molybdenum content for Grade C90 Type 1 has no minimum tolerance if the WT is less than 17,78 mm.
c. The carbon content for R95 may be increased up to 0,55 % maximum if the product is oil-quenched.
d. The molybdenum content for T95 Type 1 may be decreased to 0,15 % minimum if the WT is less than 17,78 mm.
e. For EW Grade P110, the phosphorus content shall be 0,020 % maximum and the sulfur content 0,010 % maximum.
NL = no limit. Elements shown shall be reported in product analysis.
Mechanical Properties of OCTG Tubing
a. In case of dispute, laboratory Rockwell C hardness testing shall be used as the referee method.
b. No hardness limits, but the maximum variation is controlled by manufacturer acc API 5CT.