nickel alloy 625 rods

Inconel 625丨UNS N6625

Inconel 625, also known as UNS N6625, is a nickel-chromium-molybdenum alloy with an addition of niobium that acts with the molybdenum to stiffen the alloy’s matrix and thereby provide high strength without strengthening heat treatment. The alloy resists a wide range of severely corrosive environments and is especially resistant to pitting and crevice corrosion.

Inconel 625 / UNS N6625 / NCF 625 / W.Nr 2.4856

Applications of Inconel 625:

Nickel alloy Inconel 625 is used in a variety of applications including aerospace components, air pollution control, chemical processing, marine service, nuclear industry, offshore oil and gas production, petroleum refining, and waste treatment. It is used for parts requiring both corrosion and oxidation resistance up to 2000°F (1093°C).

Normal product forms: Pipes, tubes, sheets, strips, plates, bars, forgings, hexagons, wires, and extruded sections.

Specifications/Standard:  ASTM B 366, B 443, B 444, B 446, B 564, B 704, B 705, B 751, B 775, B 829, ASME SB-366, SB-443, SB-444, SB-446, SB-564, SB-704, SB-705, SB-751, SB-775, SB-829, SAE AMS 5581, 5599, 5666, 5837, 5869, MAM 5599, BS 3072, 3074, 3076 (NA21)

Chemical Composition:

  • Nickel (Ni): 58% min

  • Chromium (Cr): 20-23%

  • Iron (Fe): 5% max

  • Molybdenum (Mo): 8-10%

  • Niobium (Nb) + Cobalt (Co): 3.15-4.15%

  • Manganese (Mn): 0.5% max

  • Cobalt: 1% max

  • Silicon (Si): 0.50 max

  • Phosphorus (P): 0.015% max

  • Sulfur (S): 0.015% max

  • Aluminium (Al): 0.4% max

  • Titanium (Ti): 0.4% max

Physical Constants and Thermal Properties

  • Density: 0.305 lbs/in³ (8.44 g/cm³)

  • Melting Range: 2350 – 2460°F (1290 – 1350°C)

  • Specific Heat: 0.102 BTU/lb-°F (32 – 212°F) or 427 J/kg-°C (0 –100°C)

Mechanical Property:

  • Yield Strength: 0.2% Offset psi (MPa): 65,000 (448)

  • Ultimate Tensile Strength psi (MPa): 125,000 (862)

  • Hardness: 200 Brinell

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