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What precisely is Inconel?

Inconel is a corrosion-resistant, oxidation-resistant alloy that performs well in high-temperature, high-pressure conditions. When Inconel alloy is heated, it develops a thick, stable oxide coating on the surface, which protects it from further attack. Inconel’s strength extends over a wide temperature range. Depending on the alloy, it achieves high temperature strength through solid solution strengthening or precipitation hardening. Inconel is a high-temperature metal widely used in a wide range of applications.

Chemical Composition of Inconel

Inconel GradeCarbonManganeseSulfurPhosphorusChromiumSiliconMolybdenumNiobiumCobaltCopperAluminumTitaniumNickelIronBoron
Inconel 6000.151.000.01514.0–17.00.500.5072.0max6.0–10.0
Inconel 6170.150.500.0150.01520.0–24.00.508.0–10.010.0–15.00.500.8–1.500.6044.2–56.03.00max0.006
Inconel 6250.100.500.0150.01520.0–23.00.508.0–10.03.15–
Inconel 6900.0190.350.00330.0max0.350.010.0259.5max9.20max
Inconel 7180.080.350.0150.01517.0–21.00.352.8–3.34.75––0.80.65–1.150.3050.0–55.0balance0.006
Inconel X-7500.081.000.0114.0–17.00.500.7––1.02.25–2.7570.0max5.0–9.0

Mechanical Properties of Inconel

Inconel GradeTensile StrengthYield Strength (0.2%Offset)DensityMelting PointElongation
Inconel 600Psi – 95,000 , MPa – 655Psi – 45,000 , MPa – 3108.47 g/cm31413 °C (2580 °F)0.4
Inconel 601Psi – 80,000 , MPa – 550Psi – 30,000 , MPa – 2058.1 g/cm31411 °C (2571 °F)0.3
Inconel 617≥ 485 MPa≥ 275 MPa8.3g/cm³1363°C0.25
Inconel 625Psi – 135,000 , MPa – 930Psi – 75,000 , MPa – 5178.4 g/cm31350 °C (2460 °F)0.425
Inconel 690≥ 485 MPa≥ 275 MPa8.3g/cm³1363°C0.25
Inconel 718Psi – 135,000 , MPa – 930Psi – 70,000 , MPa – 4828.2 g/cm31350 °C (2460 °F)0.45
Inconel 7251137 MPa827 MPa8.31 g/cm31271°C-1343 °C0.2
Inconel X-7501267 MPa868 MPa8.28 g/cm31430°C0.25

Equivalent Grade of Inconel

Inconel 6002.4816N06600NC15FE11MNCF 600NA 13NiCr15Fe
Inconel 6012.4851N06601NC23FeANCF 601NA 49NiCr23Fe
Inconel 6172.4663N06617    
Inconel 6252.4856N06625NC22DNB4MNCF 625NA 21NiCr22Mo9Nb
Inconel 6902.4642N06690    
Inconel 7182.4668N07718    
Inconel 725N07725    
Inconel X-7502.4669N07750    

What precisely is Hastelloy?

Hastelloy is a nickel-molybdenum alloy with a high melting point. It is available in a variety of grades, the bulk of which are nickel chromium molybdenum alloys. Regardless of the use for which each Hastelloy grade was developed, they are all exceedingly corrosion resistant. Hastelloy becomes stronger and tougher at elevated temperatures when alloyed with, making it ideal for welding applications. It’s simple to shape and assemble. Due to its ductility, they can be forged and cold wrought. Due to its exceptional resistance to highly oxidizing and reducing chemicals, Hastelloy is an excellent choice for high-temperature applications. It is extensively used for pipes and valves in the chemical and petrochemical industries. It is a wonderful material for heat exchangers and pressure vessels, as well as nuclear and chemical reactors.

Chemical Makeup Hastelloy

B0.10max1.25max0.60max28.00max0.30max5.50maxBalMn 0.80; Si 0.70
B20.02max1.00max1.00max26.0-30.02.00maxBalMn 1.0, Si 0.10
C0.07max1.25max16.00max17.00max0.30max40.0max5.75maxBalMn 1.0; Si 0.70
C40.015max2.00max14.0-18.014.0-17.00.70max3.00maxBalMn 1.0 ; Si 0.08
C276 0.02max2.50max14.0-16.515.0-17.00.35max3.0-4.54.0-7.0BalMn 1.0; Si 0.05
G0.05max2.50max21.0-23.55.5-7.51.00max1.5-2.51.7-2.518.0-21.0BalMn 1.0-2.0; P0.04; Si 1.0; 
N0.06max0.25max7.00max16.50max0.20max0.10max3.00maxBalMn 0.40; Si 0.25; B 0.01
S0.02max2.00max15.50max14.50max0.60max1.00max0.20max3.00maxBalMn 0.50; Si 0.40; B0.0009; La 0.02
W0.06max1.25max5.00max24.50max5.50maxBalMn 0.050; Si 0.50
X0.10max1.50max22.0max9.00max0.60max18.50maxBalMn 0.6; Si 0.60

Mechanical Properties of Hastelloy

AlloyTensile StrengthYield Strength (0.2%Offset)DensityMelting PointElongation
Alloy C22Psi – 1,00,000 , MPa – 690Psi – 45000 , MPa – 3108.69 g/cm31399 °C (2550 °F)0.45
Alloy C276Psi – 1,15,000 , MPa – 790Psi – 52,000 , MPa – 3558.89 g/cm331370 °C (2500 °F)0.4
Alloy B2Psi – 1,15,000 , MPa –760Psi – 52,000 , MPa – 3509.2 g/cm31370 °C (2550 °F)0.4
Alloy B3Psi – 1,15,000 , MPa –760Psi – 52,000 , MPa – 3509.2 g/cm31370 °C (2550 °F)0.4
Alloy C47833658.64 g/cm31350-1400 °C0.55
Alloy X655 MPa240 MPa8.22 g/cm³1355°C0.35

Equivalent Grade of Hastelloy 

C222.4602N06022NW 6022NiCr21Mo14W
C2762.4819N10276ХН65МВУNW 0276NiMo16Cr15W

Read More :

Is it better to use Inconel or Monel? : Which Alloy Is Best For You? : As a result, it is only used when no other metal is capable of performing the same task. Monel 400, for example, is one of the few alloys that retains its strength at sub-zero temperatures, therefore it’s used in a variety of applications, Read more to know further.

Monel Fittings in a Variety of Industries : Because of their high strength and resistance, Monel Tube Fittings are frequently utilized in pneumatic, hydraulic, and other applications. In marine applications, these tube fittings provide corrosion protection, To know more read further.

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