Difference Between Hastelloy and Inconel

Hastelloy

Hastelloy® is a trademark for a series of high-strength, nickel based, corrosion resistant alloys produced by Haynes International. Alloys of identical chemical and mechanical properties are available from other manufacturers and offer excellent alternatives to the various Hastelloy alloys.

FORGING INVENTORY OF NICKEL ALLOYS

Alloy B2
Alloy C
Alloy C276
Alloy N
Alloy S
Alloy W
Alloy X

GENERAL PROPERTIES

Density	8.89 gm/cm3
Specific Heat:	427 oC
Melting Point Range:	1325-1370 oC
Thermal Conductivity:	9.8 W/M-k
Electrical Resistivity:	1300
Coefficient of Thermal Expansion:	11.2 um/M-k

Hastelloy Composition

Alloy*	C%	Co%	Cr%	Mo%	V%	W%	Al%	Cu%	Nb %	Ti%	Fe%	Ni%	Other%
Hastelloy B	0.1	1.25	0.6	28	0.3	–	–	–	–	–	5.5	rest/bal	Mn 0.80; Si 0.70
Hastelloy B2 / Hastelloy B-2	0.02	1	1	26.0-30.0	–	–	–	–	–	–	2	rest/bal	Mn 1.0, Si 0.10
Hastelloy C	0.07	1.25	16	17	0.3	40	–	–	–	–	5.75	rest/bal	Mn 1.0; Si 0.70
Hastelloy C4 / Hastelloy C-4	0.015	2	14.0-18.0	14.0-17.0	–	–	–	–	–	0..70	3	rest/bal	Mn 1.0 ; Si 0.08
Hastelloy C276 / Hastelloy C-276	0.02	2.5	14.0-16.5	15.0-17.0	0.35	3.0-4.5	–	–	–	–	4.0-7.0	rest/bal	Mn 1.0; Si 0.05
Hastelloy F	0.02	1.25	22	6.5	–	0.5	–	–	2.1	–	21	rest/bal	Mn 1.5; Si 0.50
Hastelloy G	0.05	2.5	21.0-23.5	5.5-7.5	–	1	–	1.5-2.5	1.7-2.5	–	18.0-21.0	rest/bal	Mn 1.0-2.0; P0.04; Si 1.0;
Hastelloy G2 / Hastelloy G-2	0.03	–	23.0-26.0	5.0-7.0	–	–	–	0.70-1.20	–	0.70-1.50	rest/bal	47.0-52.0	Mn 1.0; Si 1.0
Hastelloy N	0.06	0.25	7	16.5	–	0.2	–	0.1	–	–	3	rest/bal	Mn 0.40; Si 0.25; B 0.01
Hastelloy S	0.02	2	15.5	14.5	0.6	1	0.2	–	–	–	3	rest/bal	Mn 0.50; Si 0.40; B0.0009; La 0.02
Hastelloy W	0.06	1.25	5	24.5	–	–	–	–	–	–	5.5	rest/bal	Mn 0.050; Si 0.50
Hastelloy X	0.1	1.5	22	9	–	0.6	–	–	–	18.5	–	rest/bal	Mn 0.6; Si 0.60

Hastelloy B-3	NICKEL ALLOY B-3 alloy is a member of the nickel-molybdenum family of Hastelloy alloys. Hastelloy B-3 is the alloy in the Hastelloy family that shows best resistance to hydrochloric acid.
Hastelloy C-276	HASTELLOY C-276 alloy is a nickel-molybdenum-chromium wrought alloy that is generally used as corrosion-resistance. Hastelloy c-276(Hastelloy C276) is among the more well known Hastelloy grades for general corrosion service. Hastelloy C-276 alloy is an improved wrought version of Hastelloy alloy C.
Hastelloy C-4	HASTELLOY C-4 alloy is a nickel-chromium-molybdenum Hastelloy alloy with good high-temperature stability. The Hastelloy C-4 is an Hastelloy grade, that resists the formation of grain-boundary precipitates in weld heat-affected zones. Hastelloy C-4 alloy also has excellent resistance to stress-corrosion cracking and to oxidizing atmospheres. Hastelloy C-4 is also used in a variety of chemical process environments.
Hastelloy G	Hastelloy G is an nickel-chromium-iron-molybdenum alloy developed for corrosion resistance in both oxidizing and reducing media. Hastelloy G shows good resistance to sulfuric and phosphoric acid. Hastelloy G may further handle both acid and alkaline solutions.
Hastelloy X	HASTELLOY X alloy – a nickel-chromium-iron-molybdenum alloy – has been developed to combine oxidation resistance, fabricability and high-temperature strength. Hastelloy X is also It has also been found to be resistant in petrochemical applications.

Hastelloy Equivalent Grades

STANDARD	WERKSTOFF NR.	UNS	GOST	AFNOR	JIS	OR	EN
Hastelloy C22	2.4602	N06022	–	–	NW 6022	–	NiCr21Mo14W
Hastelloy C276	2.4819	N10276	ХН65МВУ	–	NW 0276	ЭП760	NiMo16Cr15W
Hastelloy B2	2.4617	N10665
Hastelloy B3	2.4600	N10675
Hastelloy C4	2.4610	N06455
Hastelloy C-22HS	–	N07022
Hastelloy C2000	2.4675	N06200
Hastelloy Hybrid BC1	2.4708	N10362
Hastelloy X	2.4665	N06002

Hastelloy Melting Point, Density and Tensile Strength

	Density	Melting Point	Tensile Strength	Yield Strength (0.2%Offset)	Elongation
C22	8.69 g/cm3	1399 °C (2550 °F)	Psi – 1,00,000 , MPa – 690	Psi – 45000 , MPa – 310	45 %
C276	8.89 g/cm33	1370 °C (2500 °F)	Psi – 1,15,000 , MPa – 790	Psi – 52,000 , MPa – 355	40%
B2	9.2 g/cm3	1370 °C (2550 °F)	Psi – 1,15,000 , MPa – 760	Psi – 52,000 , MPa – 350	40%
B3	9.2 g/cm3	1370 °C (2550 °F)	Psi – 1,15,000 , MPa – 760	Psi – 52,000 , MPa – 350	40%
C4	8.64 g/cm3	1350 – 1400 °C	783	365	55%
Hybrid BC1	8.83 g/cm³	1343 – 1443°C	725	310	40%
X	8.22 g/cm³	1355°C	655 MPa	240 MPa	35%

Inconel

Inconel® is a registered trademark (of Special Metals Corporation) referring to a family of austenitic nickel-chromium super alloys.Inconel® is a material that is specifically optimized for some of the toughest use conditions to be found in manufacturing while Titanium is a chemical element with symbol Ti and atomic number 22. It is a lustrous transition metal with a silver color, low density, and high strength.

Inconel Material Specification

Inconel 600
Solid solution strengthened.
Inconel 601
Inconel 625
Acid resistant, good weldability. The LCF version is typically used in bellows. Ideal for hardware and components in the power, aerospace and chemical processing industries. Offered in sheet, plate, bar and forgings.
Inconel 718
Gamma double prime strengthened with good weldability. The preferred material for cryogenic storage tanks, turbines, downhole shafts and wellhead parts offered in sheet, plate and bar.
Inconel X750
Commonly used for gas turbine components, including blades, seals and rotors.
Inconel 907
Inconel 909
Inconel 706
Inconel 617
Inconel 751
Increased aluminium content for improved rupture strength in the 1600 °F range.
Inconel 792
Increased aluminium content for improved high temperature corrosion properties, used especially in gas turbines.
Inconel 939
Gamma prime strengthened to increase weldability.
Inconel 188
Readily fabricated for commercial gas turbine and aerospace applications. Offered in sheet, plate and bar.
Inconel 690
Low cobalt content for nuclear applications, and low resistivity.
Inconel 713C
Precipitation hardenable nickel-chromium base cast alloy.
Inconel 230
Inconel 230 Plate & Sheet mainly used by the power, aerospace, chemical processing and industrial heating industries, Aerospace Materials.

Inconel Composition

Inconel	Element (% by mass)
Inconel	Ni	Cr	Fe	Mo	Nb	Co	Mn	Cu	Al	Ti	Si	C	S	P	B
600	72.0	14.0–17.0	6.0–10.0				1.0	0.5			0.5	0.15	0.015
617	44.2–56.0	20.0–24.0	3.0	8.0–10.0		10.0–15.0	0.5	0.5	0.8–1.5	0.6	0.5	0.15	0.015	0.015	0.006
625	58.0	20.0–23.0	5.0	8.0–10.0	3.15–4.15	1.0	0.5		0.4	0.4	0.5	0.1	0.015	0.015
690	59.5	30	9.2				0.35	0.01	0.02		0.35	0.019	0.003
718	50.0–55.0	17.0–21.0	balance	2.8–3.3	4.75–5.5	1.0	0.35	0.2–0.8	0.65–1.15	0.3	0.35	0.08	0.015	0.015	0.006
X-750	70.0	14.0–17.0	5.0–9.0		0.7–1.2	1.0	1.0	0.5	0.4–1.0	2.25–2.75	0.5	0.08	0.01

Inconel alloys

Alloys of inconel include:

Inconel 600: Solid solution strengthened
Inconel 601
Inconel 625: Acid resistant, good weldability. The LCF version is typically used in bellows.
Inconel 690: Low cobalt content for nuclear applications, and low resistivity
Inconel 713C: Precipitation hardenable nickel-chromium base cast alloy
Inconel 718: Gamma double prime strengthened with good weldability
Inconel 751: Increased aluminium content for improved rupture strength in the 1600 °F range
Inconel 792: Increased aluminium content for improved high temperature corrosion properties, used especially in gas turbines
Inconel 939: Gamma prime strengthened to increase weldability

Inconel Equivalent Grades

STANDARD	WERKSTOFF NR.	UNS	GOST	AFNOR	JIS	BS	EN	OR
Inconel 600	2.4816	N06600	МНЖМц 28-2,5-1,5	NC15FE11M	NCF 600	NA 13	NiCr15Fe	ЭИ868
Inconel 601	2.4851	N06601	ХН60ВТ	NC23FeA	NCF 601	NA 49	NiCr23Fe	ЭИ868
Inconel 617	2.4663	N06617
Inconel 625	2.4856	N06625	ХН75МБТЮ	NC22DNB4M	NCF 625	NA 21	NiCr22Mo9Nb	ЭИ602
Inconel 690	2.4642	N06690
Inconel 718	2.4668	N07718
Inconel 725	–	N07725
Inconel X-750	2.4669	N07750

Inconel Melting Point, Density and Tensile Strength

	Density	Melting Point	Tensile Strength	Yield Strength (0.2%Offset)	Elongation
600	8.47 g/cm3	1413 °C (2580 °F)	Psi – 95,000 , MPa – 655	Psi – 45,000 , MPa – 310	40 %
601	8.1 g/cm3	1411 °C (2571 °F)	Psi – 80,000 , MPa – 550	Psi – 30,000 , MPa – 205	30 %
617	8.3g/cm³	1363°C	≥ 485 MPa	≥ 275 MPa	25 %
625	8.4 g/cm3	1350 °C (2460 °F)	Psi – 135,000 , MPa – 930	Psi – 75,000 , MPa – 517	42.5 %
690	8.3g/cm³	1363°C	≥ 485 MPa	≥ 275 MPa	25 %
718	8.2 g/cm3	1350 °C (2460 °F)	Psi – 135,000 , MPa – 930	Psi – 70,000 , MPa – 482	45 %
725	8.31 g/cm3	1271°C-1343 °C	1137 MPa	827 MPa	20 %
X-750	8.28 g/cm3	1430°C	1267 MPa	868 MPa	25 %

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