1.1 This specification2 covers seamless ferritic and austenitic steel boiler, superheater, and heat-exchanger tubes, designated Grades T5, TP304, etc. These steels are listed in Tables 1 and 2.
Grade | UNS Designation | Composition,8201;% | ||||||||||||||
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| Carbon | Manga- | Phospho- | Sul- | Silicon | Nickel | Chromium | Molybdenum |