Inconel

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Inconel

Inconel is a family of nickel-chromium-based superalloys known for their exceptional strength, corrosion resistance, and ability to withstand extreme temperatures. These alloys maintain their mechanical properties in harsh environments, including oxidizing and reducing atmospheres, making them ideal for aerospace, power generation, chemical processing, and marine applications.

Common grades of Inconel, such as Inconel 600, 625, and 718, offer superior resistance to oxidation, carburization, and thermal fatigue. They conform to international standards like ASTM B163, B164, and B444, providing durable and high-performance solutions for critical components like heat exchangers, turbine blades, and pressure vessels.





Chemical Composition of Inconel


Element Inconel 600 (%) Inconel 625 (%) Inconel 718 (%)
Nickel (Ni) 72.0 min 58.0 – 63.0 50.0 – 55.0
Chromium (Cr) 14.0 – 17.0 20.0 – 23.0 17.0 – 21.0
Iron (Fe) Balance Balance 17.0 – 21.0
Molybdenum (Mo) - 8.0 – 10.0 2.8 – 3.3
Niobium (Nb) - 3.15 – 4.15 4.75 – 5.50
Cobalt (Co) - Max 1.0 Max 1.0
Aluminum (Al) - 0.4 – 0.8 0.2 – 0.8
Titanium (Ti) - 0.4 – 0.7 0.65 – 1.15
Carbon (C) Max 0.15 Max 0.10 Max 0.08
Manganese (Mn) Max 1.0 Max 0.50 Max 0.35
Silicon (Si) Max 0.50 Max 0.50 Max 0.35
Phosphorus (P) Max 0.015 Max 0.015 Max 0.015
Sulfur (S) Max 0.015 Max 0.015 Max 0.015


Mechanical Proeprties of Inconel


Property Inconel 600 Inconel 625 Inconel 718
Tensile Strength 580 MPa (84 ksi) min 827 MPa (120 ksi) min 1,270 MPa (184 ksi) min
Yield Strength (0.2% offset) 275 MPa (40 ksi) min 414 MPa (60 ksi) min 1,030 MPa (150 ksi) min
Elongation (%) 30% min 30% min 12 – 20%
Hardness (HRB) 80 max 90 max 35 – 40 HRC
Modulus of Elasticity ~207 GPa ~207 GPa ~205 GPa
Density 8.43 g/cm³ 8.44 g/cm³ 8.19 g/cm³
Melting Point 1354 – 1413°C 1290 – 1350°C 1260 – 1336°C
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