Incoloy

Incoloy alloys are mostly chromium-based and mostly nickel-based, and designed for corrosion resistance as well as strength at high temperatures.

Incoloy alloys are a type of super austenitic stainless steel. One advantage of Incoloy alloys is that they do not need to be heat treated after welding to restore corrosion resistance. There are specific alloys for resistance to particular chemical attacks.

What is Incoloy Alloy used for?

Pollution control, oil and gas recovery, acid production, pickling operations, nuclear fuel reprocessing, and radioactive waste disposal all use Inconel alloys. This nickel alloy is useful for more than just its corrosion resistance.

Applications

Oil & Gas Extraction

Heat Treat Applications

Rapid Temperature Changes

Saltwater Applications

Jet Engines

Equivalent Grades of Inconel

STANDARD	WERKSTOFF NR.	UNS	EN	JIS	BS	GOST	AFNOR	OR
Incoloy 800	1.4876	N08800	X10NiCrAlTi32-20	NCF 800	NA 15	ЭИ670	Z8NC32-21	XH32T
Incoloy 800H	1.4958 / 1.4876	N08810	X5NiCrAlTi31-20	NCF 800H	NA 15(H)	ЭИ670	Z8NC33-21	XH32T
Incoloy 800HT	1.4859 / 1.4876	N08811	X8NiCrAlTi32-21	NCF 800HT	NA 15(HT)	ЭИ670	–	XH32T
Incoloy 825	2.4858	N08825	NiCr21Mo	NCF 825	NA 16	ЭП703	NFE30C20DUM	XH38BT

Mechanical properties of Inconel

Element	Tensile Strength	Yield Strength (0.2%Offset)	Density	Melting Point	Elongation
800 / 800H / 800HT	Psi – 75,000 , MPa – 520	Psi – 30,000 , MPa – 205	7.94 g/cm3	1385 °C (2525 °F)	30 %
825	Psi – 80,000 , MPa – 550	Psi – 32,000 , MPa – 220	8.14 g/cm3	1400 °C (2550 °F)	30 %

Chemical Composition

Grade	C	Mn	Si	S	Cu	Fe	Ni	Cr	Al	Ti
800	0.10 max	1.50 max	1.00 max	0.015 max	0.75 max	39.50 min	30.00 – 35.00	19.00 – 23.00	0.15 – 0.60	0.15 – 0.60
800H	0.05 – 0.10	1.50 max	1.00 max	0.015 max	0.75 max	39.50 min	30.00 – 35.00	19.00 – 23.00	0.15 – 0.60	0.15 – 0.60
800HT	0.06 – 0.10	1.50 max	1.00 max	0.015 max	0.75 max	39.50 min	30.00 – 35.00	19.00 – 23.00	0.15 – 0.60	0.15 – 0.60
825	0.05 max	1.00 max	0.5 max	0.03 max	1.50 – 3.00	22.00 min	38.00 – 46.00	19.50 – 23.50	0.02 max	0.06 – 1.20

Inconel vs. Incoloy

Although Inconel and Incoloy belong to the same family of superalloys, each has unique features in addition to those they share. Superalloys, also known as high-performance alloys, offer superior resistance to corrosion and oxidation, as well as superior mechanical strength at extreme temperatures.

Composition represents the most basic distinction between them. Inconel®, an alloy composed mostly of nickel-chromium, often contains more than 50 percent nickel, whereas Incoloyl®, a nickel-iron-chromium alloy, contains less than 50 percent nickel.

The primary distinctions between the two are their respective applications and scopes of applicability.

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