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Inconel

What is Inconel

Inconel is a family of alloys made from nickel and chromium that has major applications in manufacturing. These alloys can withstand high temperature and pressure, and oxidation-corrosion without losing their structural integrity. Though not naturally magnetic, some of them exhibit the property [1, 2].

Inconel

Inconel Types

The following alloys are nicked-based with varying compositions sold under different trade names.

  • Inconel 82
  • Inconel 182
  • Inconel 622-
  • Inconel 625
  • Inconel 600
  • Inconel 601
  • Inconel 686
  • Inconel 690
  • Inconel 718
  • Inconel 725
  • Inconel 738
  • Inconel X750
  • Inconel 792
  • Inconel 800
  • Inconel 825
  • Inconel 925
  • Inconel 939

Inconel Rod

Properties of Different Types of Inconel

Physical Properties

Types

Inconel 600 [3] Inconel 601 [4] Inconel 622 [5] Inconel 625 [6] Inconel 718 [7] Inconel 725 [8] Inconel 825 [9] Inconel 925 [10]
Density 8.47 g/cm3 8.11e-9 g/cm3 8.61 g/ cm3 8.44 lb/inch3 8.192 g/cm3 8.3 g/cm3 8.14 e-9 g/cm3 8.08 g/cm3
Melting Point 1354-1413°C (2470-2580°F) 1360-1411°C (2480-2571°F) 1351- 1387°C (2464 – 2529 °F) 1287-1348°C (2350-2460°F) 1370-1430°C (2500-2600°F) 1271-343°C (2320-2449°F) 1370-1400°C (2500-2550°F) 1311-1366°C (2392-2490°F)
Thermal conductivity 14.8 W/m·K 11.1 W/m·K 13.2 W/m·K 9.8 W/m·K 6.5 W/m·K 11.2 W/m·K 11.1 W/m·K 12 W/m·K

Mechanical Properties

Hardness 65-85 HRB 86 RB 86 HRB 145-240 HB 331 HB 43 HRC 135-165 RB 76 RB
Yield strength 310 MPa 205-640 MPa 570 MPa 413 MPa 1240 MPa 427 MPa 338 MPa 810 MPa
Elongation break at 2 inches 42% 42% 54% 30% 12% 57% 45% 24%

Inconel Exhaust

Inconel 625 Tubing

What is Inconel Used for

  • Since these alloys can withstand corrosion, they are used in making propeller blades, propulsion motors, bellows, submarine fittings, hydraulic line tubing, aircraft ducting, and heat exchangers [11].
  • Some types of inconel are used in the manufacture of exhaust components, pipes, valves, heat-shield sheets, reactors, roller hearths, process equipments, radiant tubes, and turbine wheels [11, 12].
  • These are useful in making jewelry of different designs.

References

  1. http://www.specialmetals.com/assets/smc/documents/alloys/inconel/inconel-alloy-625.pdf
  2. https://www.steelforge.com/literature/metal-tidbits/inconel/
  3. http://asm.matweb.com/search/SpecificMaterial.asp?bassnum=NINC30
  4. http://www.specialmetals.com/assets/smc/documents/alloys/inconel/inconel-alloy-601.pdf
  5. http://specialmetals.ir/images/technical_info/nickel-base-alloy/inconel-alloy_622_625.pdf
  6. https://www.azom.com/article.aspx?ArticleID=4189
  7. https://www.azom.com/article.aspx?ArticleID=4459
  8. https://www.azom.com/article.aspx?ArticleID=7703
  9. http://www.specialmetals.com/assets/smc/documents/alloys/incoloy/incoloy-alloy-0825.pdf
  10. http://www.specialmetals.com/assets/smc/documents/alloys/incoloy/incoloy-alloy-925.pdf
  11. https://www.ferralloy.com/inconel-alloys-uses-characteristics/
  12. https://www.hpalloy.com/Alloys/descriptions/INCONEL600.aspx#applications

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