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Martensitic Stainless

Super 13CR

SUPER 13 CHROME(13-5-2): ASTM A-276, & ASTM A-484

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.

CHEMICAL COMPOSITION:

UNS-41425 C Mn P S Si Cr Ni Mo
Minimum 0.500 12.500 4.500 1.600
Maximum 0.030 1.000 0.020 0.005 0.500 14.000 6.000 2.000
UNS-41426 C Mn P S Si Cr Ni Mo
Minimum 11.500 4.500 1.500
Maximum 0.030 0.500 0.020 0.005 0.500 13.500 6.000 2.500
UNS-41427 C Mn P S Si Cr Ni Mo
Minimum 11.800 4.500 1.600
Maximum 0.030 1.000 0.020 0.005 0.500 13.500 6.000 2.500

COMMONLY STOCKED 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

COMMONLY STOCKED MATERIAL FORMS:

Rolled bar

Forged bar

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