Is Inconel 625 magnetic?
Inconel 625 (Nickel 625) Strip, Foil, Wire to AMS 5599, AMS 5979, ASTM B443 Gr1 or Gr2
Gr1 - Annealed condition, service up to 1100 °F
Gr2 - Solution annealed condition, service above 1100 °F, where creep and rupture resistance is required
Applications of Inconel 625
Honeycomb structures
Flexible metal hoses
Bellows
Heat exchangers
Manifold rods
Springs
Seals
Bellows
Fasteners
Marine components
What is Inconel 625?
Inconel 625 alloy is a non-magnetic, corrosion- and oxidation-resistant nickel-chromium alloy. The high strength of Inconel 625 comes from its strengthening combination of molybdenum and niobium added to the nickel-chromium matrix. Inconel 625 alloy is extremely resistant to a variety of extremely severe corrosive environments, including oxidation and high temperature effects such as carburization. Its excellent strength and toughness from cryogenic temperatures up to 2000°F (1093°C) are primarily due to the solid solution effect of the refractory metals columbium and molybdenum in the nickel-chromium matrix. Inconel 625 has excellent resistance to pitting and crevice corrosion, high corrosion fatigue strength, high tensile strength, and resistance to chloride-ion stress corrosion cracking, making it ideal for seawater applications. Inconel alloys are used not only in aerospace applications but also in marine applications. Common applications for the alloy include springs, seals, subsea control bellows, cable connectors, fasteners, flexures, and marine instrument components.
625 Nickel Alloy Chemical Composition
Nickel: 58.00 % minimum
Chromium: 20.0-23.0 %
Iron: 5 % maximum
Molybdenum: 8.0-10.0 %
Niobium + Tantalum: 3.15-4.15 %
Manganese: 0.50 % maximum
Carbon: 0.10 % maximum
Silicon: 0.50 % maximum
Phosphorus: 0.015 % maximum
Sulfur: 0.015 % maximum
Aluminum: 0.40 % maximum
Titanium: 0.40 % maximum
Cobalt: 1.00 % maximum
Physical Properties of Inconel 625
Density: 0.305 lb/in3, 8.44 g/cm3 average
Coefficient of Thermal Expansion: in/in/°F (m/m/°C)
68 -400 °F (20 - 204 °C): 7.3 x 10·6 (13.1)
68 - 600 °F (20 - 315 °C): 7.5 x 10·6 (13.5)
68 - 800 °F (20 - 427 °C): 7.7 x 10·6 (13.9)
Magnetic Permeability H = 200 Oersteds
Annealed: 1.0006
Modulus of Elasticity: ksi (MPa) (tensile)
30.2 x 103 (208 x 103)
Melting Range: 2350 - 2460 ° F (1290 - 1350 °C)
Forms
Nickel Coil Product Forms
Inconel 625 Strip Coil
Inconel 625 Foil Coil
Nickel Alloy 625 Strip Coil
Nickel Wire Product Forms
Nickel Alloy 625 Shaped Wire
Inconel 625 Round Wire
Inconel 625 Flat Wire
Inconel 625 Square Wire
Mechanical Properties of 625 Alloy at Room Temperature
Typical Annealed Properties of Inconel 625
Ultimate Tensile Strength: 120 KSI minimum (827 MPa minimum)
Yield Strength: (0.2% deflection) 60 KSI minimum (414 MPa minimum)
Elongation: 30% minimum (for sizes > 0.040 inches)
Properties: Tempered
Inconel 625 can be cold rolled to achieve specific customer desired temper properties and/or fabrication requirements. Contact Gnee Steel for details.
Surface Treatments
#1 - Hot rolled annealed and descaled. Available in strip, foil and ribbon. For applications where a smooth decorative surface is not required.
#2D - Matte surface produced by cold rolling, annealing and descaling. For deep drawn parts and parts where lubricants need to be retained during the forming process. #2B - Smooth surface produced by cold rolling, annealing and descaling. After annealing, a light cold rolling pass with polished rolls gives a brighter surface than 2D.
#BA - Bright annealed cold rolled and bright annealed
#CBA - Coarse bright annealed cold rolled matte surface and bright annealed
#2 - Cold rolled
#2BA - Smooth surface produced by cold rolling and bright annealed. Light rolling with highly polished rolls gives a glossy surface. For light forming applications where a glossy surface is required, the 2BA surface treatment can be used. Polishing - Various grit surface treatments to meet specific polishing requirements.
* Not all finishes are available on all alloys - contact Ulbrich Sales for more information.
Wire Finishes
XC - Extra Clean Bright Annealed or Bright Annealed and Cold Rolled Grease - Extra Bright Finish (for decorative applications) Soap - Soap coating on tempered wire, used as a lubricant. * For custom wire finishes, contact Gnee Steel.
Heat Treating
Inconel 625 cannot be heat treated for hardening.
Welding Inconel 625
Inconel 625 has excellent weldability and brazing properties.
