Inconel Vs Hastelloy chemical and mechanical properties

Inconel and Hastelloy chemical and mechanical properties

What is Inconel?

Inconel is an oxidation corrosion resistant material well suited for extreme environment services subjected to heat and pressure. When Inconel alloy is heated it forms a stable, thick and passivating oxide layer which protects the surface from future attack. Inconel possess strength over a wide temperature range. Its high temperature strength is produced by solid solution strengthening or precipitation hardening depending on the alloy. Inconel is typically used for high temperature applications.

Inconel Chemical Composition

Inconel Grade	Carbon	Manganese	Sulfur	Phosphorus	Chromium	Silicon	Molybdenum	Niobium	Cobalt	Copper	Aluminum	Titanium	Nickel	Iron	Boron
Inconel 600	0.15	1.00	0.015	-	14.0–17.0	0.50	-	-	-	0.50	-	-	72.0max	6.0–10.0	-
Inconel 617	0.15	0.50	0.015	0.015	20.0–24.0	0.50	8.0–10.0	-	10.0–15.0	0.50	0.8–1.50	0.60	44.2–56.0	3.00max	0.006
Inconel 625	0.10	0.50	0.015	0.015	20.0–23.0	0.50	8.0–10.0	3.15–4.15	1.00	-	0.40	0.40	58.0max	5.00max	-
Inconel 690	0.019	0.35	0.003	-	30.0max	0.35	-	-	-	0.01	0.02	-	59.5max	9.20max	-
Inconel 718	0.08	0.35	0.015	0.015	17.0–21.0	0.35	2.8–3.3	4.75–5.5	1.00	0.2–0.8	0.65–1.15	0.30	50.0–55.0	balance	0.006
Inconel X-750	0.08	1.00	0.01	-	14.0–17.0	0.50	-	0.7–1.2	1.00	0.50	0.4–1.0	2.25–2.75	70.0max	5.0–9.0	-

Inconel Mechanical Properties

Inconel Grade	Tensile Strength	Yield Strength (0.2%Offset)	Density	Melting Point	Elongation
Inconel 600	Psi – 95,000 , MPa – 655	Psi – 45,000 , MPa – 310	8.47 g/cm3	1413 °C (2580 °F)	0.4
Inconel 601	Psi – 80,000 , MPa – 550	Psi – 30,000 , MPa – 205	8.1 g/cm3	1411 °C (2571 °F)	0.3
Inconel 617	≥ 485 MPa	≥ 275 MPa	8.3g/cm³	1363°C	0.25
Inconel 625	Psi – 135,000 , MPa – 930	Psi – 75,000 , MPa – 517	8.4 g/cm3	1350 °C (2460 °F)	0.425
Inconel 690	≥ 485 MPa	≥ 275 MPa	8.3g/cm³	1363°C	0.25
Inconel 718	Psi – 135,000 , MPa – 930	Psi – 70,000 , MPa – 482	8.2 g/cm3	1350 °C (2460 °F)	0.45
Inconel 725	1137 MPa	827 MPa	8.31 g/cm3	1271°C-1343 °C	0.2
Inconel X-750	1267 MPa	868 MPa	8.28 g/cm3	1430°C	0.25

Inconel Equivalent Grade

Standard	WNR	UNS	AFNOR	JIS	BS	EN
Inconel 600	2.4816	N06600	NC15FE11M	NCF 600	NA 13	NiCr15Fe
Inconel 601	2.4851	N06601	NC23FeA	NCF 601	NA 49	NiCr23Fe
Inconel 617	2.4663	N06617
Inconel 625	2.4856	N06625	NC22DNB4M	NCF 625	NA 21	NiCr22Mo9Nb
Inconel 690	2.4642	N06690
Inconel 718	2.4668	N07718
Inconel 725	-	N07725
Inconel X-750	2.4669	N07750

What is Hastelloy?

Hastelloy is a nickel molybdenum alloy. It has many different grades and many of which are nickel chromium molybdenum alloys. Hastelloy grades is been optimized for a specific purpose but all grades are highly corrosion resistant. The addition of makes hastelloy stronger and harder at high temperature and also makes it great for welding applications. It can be easily formed and fabricated. They can be forged and cold worked due to good ductility. Hastelloy provides outstanding resistance to highly oxidizing and reducing agents which makes it outstanding resistance to highly oxidizing and reducing agents. It is commonly used in chemical processing and petrochemical industries for pipes and valves. It is excellent for heat exchangers and pressure vessels and it is also used in nuclear reactors and chemical reactors

Hastelloy Chemical Composition

Alloy	Carbon	Cobalt	Chromium	Molybdenum	Vanadium	Tungsten	Aluminium	Copper	Niobium	Titanium	Iron	Nitrogen	Other%
B	0.10max	1.25max	0.60max	28.00max	0.30max	-	-	-	-	-	5.50max	Bal	Mn 0.80; Si 0.70
B2	0.02max	1.00max	1.00max	26.0-30.0	-	-	-	-	-	-	2.00max	Bal	Mn 1.0, Si 0.10
C	0.07max	1.25max	16.00max	17.00max	0.30max	40.0max	-	-	-	-	5.75max	Bal	Mn 1.0; Si 0.70
C4	0.015max	2.00max	14.0-18.0	14.0-17.0	-	-	-	-	-	0.70max	3.00max	Bal	Mn 1.0 ; Si 0.08
C276	0.02max	2.50max	14.0-16.5	15.0-17.0	0.35max	3.0-4.5	-	-	-	-	4.0-7.0	Bal	Mn 1.0; Si 0.05
G	0.05max	2.50max	21.0-23.5	5.5-7.5	-	1.00max	-	1.5-2.5	1.7-2.5	-	18.0-21.0	Bal	Mn 1.0-2.0; P0.04; Si 1.0;
N	0.06max	0.25max	7.00max	16.50max	-	0.20max	-	0.10max	-	-	3.00max	Bal	Mn 0.40; Si 0.25; B 0.01
S	0.02max	2.00max	15.50max	14.50max	0.60max	1.00max	0.20max	-	-	-	3.00max	Bal	Mn 0.50; Si 0.40; B0.0009; La 0.02
W	0.06max	1.25max	5.00max	24.50max	-	-	-	-	-	-	5.50max	Bal	Mn 0.050; Si 0.50
X	0.10max	1.50max	22.0max	9.00max	-	0.60max	-	-	-	18.50max	-	Bal	Mn 0.6; Si 0.60

Hastelloy Mechanical Properties

Alloy	Tensile Strength	Yield Strength (0.2%Offset)	Density	Melting Point	Elongation
Alloy C22	Psi – 1,00,000 , MPa – 690	Psi – 45000 , MPa – 310	8.69 g/cm3	1399 °C (2550 °F)	0.45
Alloy C276	Psi – 1,15,000 , MPa – 790	Psi – 52,000 , MPa – 355	8.89 g/cm33	1370 °C (2500 °F)	0.4
Alloy B2	Psi – 1,15,000 , MPa –760	Psi – 52,000 , MPa – 350	9.2 g/cm3	1370 °C (2550 °F)	0.4
Alloy B3	Psi – 1,15,000 , MPa –760	Psi – 52,000 , MPa – 350	9.2 g/cm3	1370 °C (2550 °F)	0.4
Alloy C4	783	365	8.64 g/cm3	1350-1400 °C	0.55
Alloy X	655 MPa	240 MPa	8.22 g/cm³	1355°C	0.35

Hastelloy Equivalent Grade

Alloy	WNR	UNS	GOST	JIS	EN
C22	2.4602	N06022	-	NW 6022	NiCr21Mo14W
C276	2.4819	N10276	ХН65МВУ	NW 0276	NiMo16Cr15W
B2	2.4617	N10665	-	-	-
B3	2.46	N10675	-	-	-
C4	2.461	N06455	-	-	-
C-22	-	N07022	-	-	-
C2000	2.4675	N06200	-	-	-
X	2.4665	N06002	-	-	-