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
HASTELLOY B2 ®
HASTELLOY C ®
HASTELLOY C276 ®
HASTELLOY N ®
HASTELLOY S ®
HASTELLOY W ®
HASTELLOY 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% Ai% 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 1.50; 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 HASTELLOY 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 varity of chemical process environments.
Hastelloy G Hastelloy G is an nickel-chromium-iron-molybdenum alloy developed for corrosion resistance in both oxidizing and reduceing 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)
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 XH60BT 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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