Hybrid corrosion-resistant nickel alloys

1. A nickel-molybdenum-chromium alloy, capable of withstanding both strong oxidizing and strong reducing 2.5% hydrochloric acid solutions at 121° C., consisting essentially of:

molybdenum

20.0 to 23.5

wt. %

chromium

13.0 to 16.5

wt. %

aluminum

up to 0.5

wt. %

manganese

up to 1

wt. %

magnesium

up to 0.05

wt. %

rare earth elements

up to 0.05

wt. %

iron

up to 2.0

wt. %

silicon

up to 0.08

wt. %

carbon

up to 0.013

wt. %

tungsten

up to 0.75

wt. %

cobalt

up to 1.0

wt. %

copper

up to 0.5

wt. %

titanium

up to 0.2

wt. %

niobium

up to 0.5

wt. %

tantalum

up to 0.2

wt. %

vanadium

up to 0.2

wt. %

nickel

balance.

2. The nickel-molybdenum-chromium alloy of claim 1 wherein the alloy is in a wrought form selected from the group consisting of sheets, plates, bars, tubes, pipes, forgings, and wires.

3. The nickel-molybdenum-chromium alloy of claim 1 wherein the alloy is in cast form.

4. The nickel-molybdenum-chromium alloy of claim 1 wherein the alloy is in powder metallurgy form.

5. A nickel-molybdenum-chromium alloy capable of withstanding both strong oxidizing and strong reducing 2.5% hydrochloric acid solutions at 121° C. consisting of:

molybdenum

21.46 to 23.06

wt. %

chromium

13.77 to 15.60

wt. %

manganese

about 0.3

wt. %

aluminum

about 0.3

wt. %

the balance being nickel plus impurities and residuals of elements used for control of oxygen and sulfur.

6. The nickel-molybdenum-chromium alloy of claim 5 wherein the impurities and residuals consist of:

magnesium

up to 0.05

wt. %

rare earth elements

up to 0.05

wt. %

iron

up to 2.0

wt. %

silicon

up to 0.08

wt. %

carbon

up to 0.013

wt. %

tungsten

up to 0.75

wt. %

cobalt

up to 1.0

wt. %

copper

up to 0.5

wt. %

titanium

up to 0.2

wt. %

niobium

up to 0.5

wt. %

tantalum

up to 0.2

wt. %

vanadium

up to 0.2

wt. %.

7. A nickel-molybdenum-chromium alloy, capable of withstanding both strong oxidizing and strong reducing 2.5% hydrochloric acid solutions at 121° C., consisting essentially of:

molybdenum

21.46 to 23.06 wt. %

chromium

13.0 to 16.5 wt. %

aluminum

up to 0.5 wt. %

manganese

up to 1 wt. %

magnesium

up to 0.05 wt. %

rare earth elements

up to 0.05 wt. %

iron

up to 2.0 wt. %

silicon

up to 0.08 wt. %

carbon

up to 0.013 wt. %

tungsten

up to 0.75 wt. %

cobalt

up to 1.0 wt. %

copper

up to 0.5 wt. %

titanium

up to 0.2 wt. %

niobium

up to 0.5 wt. %

tantalum

up to 0.2 wt. %

vanadium

up to 0.2 wt. %

nickel

balance