Abstract The invention provides a corrosion resistant high strength steel, which has a ferritic/austenitic microstructure consisting of 40 to 60% austenite grains embedded in a ferrite matrix being substantially free of precipitated particles of other phases, the steel consisting of the following elements in proportion by weight: ______________________________________ Chromium 26.5% - 30% by weight
Nickel 7.4% - 14% by weight
Molybdenum 2.0% - 5% by weight
Copper 0.5% - 5% by weight
Silicon 0.2% - 2% by weight
Manganese 0.2% - 4% by weight
Carbon 0.01% - 0.1%
by weight
Nitrogen 0.1% - 0.3%
by weight
Iron Balance or remainder
______________________________________
A corrosion resistant high strength steel, which has a ferritic/austenitic microstructure consisting of 40% to 60% austenite grains embedded in a ferrite matrix being substantially free of precipitated particles of other phases, the steel consisting of the following elements in proportion by weight: ______________________________________
Chromium 26.5% - 30% by weight
Nickel 7.4% - 14% by weight
Molybdenum 2.0% - 5% by weight
Copper 0.5% - 5% by weight
Silicon 0.2% - 2% by weight
Manganese 0.2% - 4% by weight
Carbon 0.01% - 0.1%
by weight
Nitrogen 0.1% - 0.3%
by weight
Iron Balance or remainder
______________________________________
Claim 2
Dependent Claim
97 words
A corrosion resistant high strength steel, which has a ferritic/austenitic microstructure consisting of 40% to 60% austenite grains embedded in a ferrite matrix being substantially free of precipitated particles of other phases, the steel consisting of the following elements in proportion by weight: ______________________________________
Chromium 26.5% - 30% by weight
Nickel 7.4% - 14% by weight
Molybdenum 2.0% - 5% by weight
Copper 0.5% - 5% by weight
Silicon 0.2% - 2% by weight
Manganese 0.2% - 4% by weight
Carbon 0.01% - 0.1%
by weight
Nitrogen 0.1% - 0.3%
by weight
Iron Balance or remainder
______________________________________