API 5CT Super 13Cr% 95KSI and 110KSI Tubing

General Scope:

There are several proprietary Super 13 Chrome grades available in the market today. The most common are UNS S41425, S41426, & S41427.

These grades are used in oilfield environments that contain CO2, and low concentrations of H2S.

Applications:

Typical applications are completion equipment, tubulars(like tubing string) and pipelines(like Gullfaks, Sleipner, Huldra, Sigyn, Mikker).

Corrosion resistant alloys have increasingly been used for piping, pumps and valves in the production of oil and gas the last two decades.

Expensive high alloy corrosion resistant alloys as the duplex have been used instead of C-steel and corrosion inhibitors. Inhibitors are expenxive negative from an enviromental point of view.

Super 13Cr was introduced as a cheaper imaterial with high mechanical strength(reduces all thickness and weight), good fracture thoughness and satisfactory corrosion resistance.

This steel has significant increased corrosion resistance in sweet service compated to traditional martersitic grades.

Satisfactory welding procedures have also developed. There have been several piping failures where Super 13Cr has been used. Increased understanding of potential failure mechanisms has strongly limited their applications(specially hydrogen embrittlement)

Chemical Composition:

>>>Standard API SPECIFICATION 5CT ISO 11960:2004, Pertroleum and natural gas industries-Steel pipes for use as casing or tubing for wells
	>>>Typical Strength Levels: 95,000 psi minimum yield- limited to a Rockwell C - 28/29 maximum. 110,000 psi minimum yield - limited to a Rockwell C -32 maximum

Black Surface Rough Turned Peeled