Low Alloy Ferritic Steel - an overview | ScienceDirect TopicsCarbon and low-alloy steels (ferritic-pearlitic and quenched and tempered steels) exhibit SCC in hot nitrate, hydroxide, ammonia, alkanol amine, chloride, and carbonate--bicarbonate solutions, where cracking typically is intergranular along prior austenite grain boundaries.
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Bainitic low alloy steels as well as ferritic-pearlitic carbon manganese steels are used extensively in both conventional and nuclear steam-raising plants for steam generator shells. Strain-induced corrosion cracking was observed in the 1980s due to dynamic loading caused by large thermal transients associated with high residual welding stresses.Low Alloy Ferritic Steel - an overview | ScienceDirect TopicsCarbon and low-alloy steels (ferritic-pearlitic and quenched and tempered steels) exhibit SCC in hot nitrate, hydroxide, ammonia, alkanol amine, chloride, and carbonate--bicarbonate solutions, where cracking typically is intergranular along prior austenite grain boundaries.Low Alloy Ferritic Steel - an overview | ScienceDirect TopicsLow alloy ferritic steels that show a high fracture resistance, combined with an acceptable ductility, are the materials selected for the pressure vessel. The body of the vessel is of low alloy carbon steel, commonly cladded with a minimum of about 3 to 10 mm of austenitic stainless steel to minimize corrosion at the inside surfaces in contact with the coolant.
Ferritic steel grades are highly valued for fabrication of components in the thermal power generation industry. As well as low chromium ferritic/bainitic steels for boiler components like waterwalls or for sub-critical steam piping and headers, steels with a chromium content in the range of 912% for ultra-super critical (USC) power plants are of great interest.Ferritic Stainless Steel - an overview | ScienceDirect TopicsThe so-called low interstitial grades of ferritic stainless steel contain less than 0.03% carbon and nitrogen which enhances ductility, toughness and weldability. Welding conventional ferritic stainless steels can cause excessive grain growth, sensitisation and a decrease in ductility.
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