Non-magnetic corrosion resistant high strength steels

Details Non-magnetic corrosion resistant high strength steels Non-magnetic corrosion resistant high strength steels

C - Chemistry, Metallurgy

22

C

C22C 38/58 (2006.01) C22C 38/44 (2006.01)

Patent

CA 2307570

A non-magnetic corrosion and galling resistant high strength steel suitable for use as non-magnetic components in directional drilling of oil and gas wells whose composition by weight includes: carbon up to 0.2 %; silicon up to 1.0 %; manganese from 10.0 to 20.0 %; chromium from 13.5 to 18.0 %; nickel from 1.0 to 7.0 %; molybdenum from 1.5 to 4.0 %; and nitrogen from 0.2 to 0.4 %, the composition satisfying the formulae: (i) and (ii): nickel equivalence + chromium equivalence > 35

La présente invention concerne un acier non magnétique haute résistance, anti-grippant et anticorrosion conçu pour être utilisé dans des composants non magnétiques dans le forage directionnel des puits de gaz et de pétrole, ayant la composition pondérale ci-après: carbone jusqu'à 0,2 %; silicium jusqu'à 1,0 %; manganèse de 10,0 à 20,0 %; chrome de 13,5 à 18,0 %; nickel de 1,0 à 7,0 %; molybdène de 1,5 à 4,0 %; et azote de 0,2 à 4,0 %, la composition répondant aux formules (i) et (ii): équivalence nickel + équivalence chrome >35.

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