Corrosion resistant austenitic stainless steel
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United States of America Patent
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-
Aug 12, 1980
Issued Date -
N/A
app pub date -
Jan 26, 1979
filing date -
May 1, 1974
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A substantially non-porous, austenitic stainless steel that is resistant to chloride pitting and sulfuric acid and a method for making it are disclosed. The steel includes from 21-45% manganese, from 10-30% chromium, from 0.85-3% nitrogen, from 0-1% carbon, from 0-2% silicon, and at least two elements selected from 1-3% copper, 1-4% nickel and 1-4% molybdenum with the combined weight of copper, nickel and molybdenum not exceeding 5% of the composition, and the balance iron and residuals, wherein the composition is such that: ##EQU1## The steel is cast and worked to avoid a dwell period in the temperature range of 1000.degree.-1600.degree. F.
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