Designated as UNS N06617 or W.Nr. 2.4663a, Inconel 617, also known as “Alloy 617”, is a nickel-chromium-cobalt-molybdenum alloy with an exceptional combination of metallurgical stability, strength, and oxidation resistance at high temperatures. Its resistance to oxidation is enhanced by an aluminum addition. Inconel Alloy 617 also resists a wide range of corrosive aqueous environments. It can be used in gas turbines for combustion cans, ducting, and transition liners; for petrochemical processing piping; for heat-treatment equipment; and in nitric acid production. Inconel 617 also offers attractive properties for piping components of power plants, both fossil-fueled or nuclear.

1. Chemical Composition Requirements

Element	Content, %
Nickel	≥44.5
Chromium	20.0-24.0
Cobalt	10.0-15.0
Molybdenum	8.0-10.0
Aluminum	0.8-1.5
Carbon	0.05-0.15
Iron	≤3.0
Manganese	≤1.0
Silicon	≤1.0
Sulfur	≤0.015
Titanium	≤0.6
Copper	≤0.5
Boron	≤0.006

2. Physical Properties

Density		Melting Range		Specific Heat at 78°F(26°C)		Electrical Resistivity at 78°F(26°C)
lb/in3	Mg/m3	°F	°C	Btu/lb-°F	J/kg-°C	ohm-circ mil/ft	μΩ-m
0.302	8.36	2430-2510	1332-1380	0.100	419	736	1.22

3. Product Forms and Related Standards for Inconel 617

Products Form	Standard
Rod, bar and wire	ASTM B166
Plate, sheet and strip	ASTM B168, B906
Seamless pipe and tube	ASTM B167, B829
Billet and bar for reforging	ASTM B472
Forging	ASTM B564

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