Steel alloy having improved creep strength

Details Steel alloy having improved creep strength Steel alloy having improved creep strength

1993-08-17

1995-02-28

Yee, Deborah

Alloys or metallic compositions

Ferrous

Nine percent or more chromium containing

420 51, 420 54, C22C 3848

Patent

active

053934873

ABSTRACT:
An austenitic steel alloy is provided having improved creep strength at high temperature. The improved creep strength performance is achieved by adding a limited amount of silicon to the steel alloy along with increased amounts of nitrogen and columbium, also known as niobium. The added columbium ties up the carbon in the alloy composition to prevent sensitization promotion and premature corrosion-fatigue failures. The resulting steel alloy provides improved strength, improved carburization resistance, and maintains good weldability.

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