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Nickel-Chromium-Iron Alloys
Composition
44.2-72+% Nickel, 14-31% Chromium, 3-20% Iron. Common fourth addition is Molybdenum, followed by balances of Cobalt, Niobium, Titanium, Aluminium, Carbon, Manganese and SIlicon.
Common Shapes
Nickel-Chromium-Iron Alloys are commonly available in
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Sheets and Plates
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Welded & Seamless Tubes and Pipes
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Structural profiles
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Wire
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Rods
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Bars
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Fittings
(Not all alloys or tempers available in all shapes)
Characteristics
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Stable, thick Cr₂O₃ film layer, strengthened when heated, giving excellent corrosion resistance.
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Reliable strength over wide temperature range
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Excellent creep resistance at high temperatures
Uses
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Gas turbine blades
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Jet engine components
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Turbo charger rotors
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Pressure vessels, especially 718 in cryogenic use.
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Heat exchangers
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Exhaust systems
Weldability
Nickel-Chromium-Iron Alloys are not easily welded, with the exception of Alloys 625 and 718, which are weldable via MTAW welding.
Machinability
Nickel-Chromium-Iron Alloys are not readily machined, due to their rapid work hardening.
Commonly Used Alloys
600 | 601 | 617 | 625 | 690 | 718 | 725 | 738
X-750
Common Trade Names
Inconel®, Chronin®, Altemp®, Haynes®, Nicrofer®
Integ Metals // Materials // Nickel // Nickel-Chromium-Iron Alloys
