Abstract: Directed to a corrosion resistant alloy particularly designed for use in power plant exhaust gas scrubbers which contains about 0.015% to about 0.025% carbon, not more than about 1% manganese, not more than about 0.3% silicon, about 19% to about 22% chromium, about 8.5% to about 9.5% molybdenum, about 30% to about 42% nickel, up to about 0.2% nitrogen, with the nickel and nitrogen contents being so related that at about 30% nickel, the nitrogen content is at least about 0.15%, while at a nickel content of at least about 40%, the nitrogen content does not exceed about 0.03%, the balance being essentially iron, with the iron content in the range of about 28% to about 40%.

Abstract: A casting alloy is provided containing about 0.02% to 0.05% carbon, about 23% to about 25% chromium, about 8% to 12% nickel, about 5% to 7% molybdenum, about 0.4% to 0.8% manganese, about 0.1% to 0.3% silicon, about 0.1% to 0.4% nitrogen, and the balance essentially iron, the alloy having a duplex austenite-ferrite grain structure, and being resistant to the corrosive effects of acids, chloride solutions and seawater.

Abstract: A ferritic stainless steel having improved impact properties contains between about 21% and about 30% chromium, up to about 5% molybdenum, up to about 6% nickel, between about 0.1% and about 0.4% niobium, between about 0.1% and about 0.75% aluminum, up to about 0.3% titanium, up to about 0.025% carbon, up to about 0.035% nitrogen, and the balance essentially iron and incidental impurities. The ferritic stainless steels of the present invention are particularly useful in welded structures because the weld metal displays superior impact properties.