Inconel, what is it exactly?

Inconel is a corrosion- and oxidation-resistant alloy that performs exceptionally well in high-temperature, high-pressure environments. When Inconel alloy is heated, it forms a thick, stable oxide coating on the surface, protecting it from further attack. Inconel’s strength is maintained over a wide temperature range. It achieves high temperature strength through solid solution strengthening or precipitation hardening, depending on the alloy.. Inconel is a high-temperature metal that is widely used in a wide range of applications.

Chemical Formula 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

Inconel Equivalent Grade

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    

Hastelloy, what is it exactly?

Hastelloy is a high-melting-point nickel-molybdenum alloy. It is available in a variety of grades, the majority of which are nickel chromium molybdenum alloys. Regardless of the application for which it was designed, each Hastelloy grade is extremely corrosion resistant. Hastelloy becomes stronger and tougher at higher temperatures when alloyed with, making it ideal for welding applications. It’s simple to shape and assemble. Because of their ductility, they can be forged and cold worked. Because of its outstanding resistance to strongly oxidising and reducing substances, Hastelloy is an excellent choice for high-temperature applications. It is widely used for pipes and valves in the chemical and petrochemical industries. It’s an excellent material for heat exchangers, pressure vessels, nuclear and chemical reactors, and other applications.

Hastelloy Chemical Makeup

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

Hastelloy’s Mechanical Characteristics

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

Hastelloy’s Equivalent Grade

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

Read More :

What is the difference between Hastelloy and Monel? : Monel is largely made of nickel and copper (52-67 percent), with minor amounts of silicon, manganese, iron, and carbon. Hastelloy is one of the most corrosion-resistant nickel-based steel alloys available. Hastelloy, as compared to standard alloys, has a unique mix of features that make them substantially more corrosion resistant, Read more

Comparison of Monel and Nickel Valves : There are three variables to consider when evaluating the quality of a valve section. The first is the general construction quality. Poor construction, regardless of the material, will ruin any valve. The pistons’ surface condition is the second factor to consider, Read More.

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