| 摘要 |
The present invention is directed to air-meltable, castable, weldable, machinable alloys of reasonable ductility and resistance to very hot concentrated sulfuric acid as well as to most other more dilute strengths of the acid either in the pure acid-water forms or containing additionally contaminants that might be encountered in practical applications. The alloys consist essentially of between about 36% and about 40.5% by weight nickel, from about 31% to about 33% by weight chromium, from about 4% to about 5.2% by weight molybdenum, from about 2.7% to about 4% by weight copper, from about 2.5% to about 6% by weight silicon, from about 0.40% to about 0.62% by weight nitrogen and the balance essentially iron. The instant alloys may also contain up to about 2% by weight manganese and up to 0.11% by weight carbon.
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