Inconel 625


Inconel 625

INCONEL 625 is a heat and corrosion resistant nickel alloy. Parts built in INCONEL 625 have chemical composition corresponding to UNS N06625, AMS 5666F, AMS 5599G, W.Nr 2.4856, DIN NiCr22Mo9Nb. This type of alloy is characterized by having high tensile, creep and rupture strength. Conventionally cast or wrought components in this type of nickel alloy have typically excellent fatigue and thermal-fatigue properties combined with good oxidation resistance. INCONEL 625 is expected to have good corrosion resistance in various corrosive environments. Especially sea-water applications require high pitting and crevice corrosion resistance, stress-corrosion resistance against chloride-ions, high tensile and corrosion fatigue strength. Parts built from INCONEL 625 can be heat treated and material properties can be varied within specified range. Parts can be machined, spark-eroded, welded, micro shot-peened, polished and coated in both as-built and in heat treated conditions.

Mechanical Properties Test Method As Built Heat Treated
Tensile strength ISO 6892-1:2009(B) Annex D 950 ± 50 MPa Min. 830 MPa
Yield Strength (Rp 0.2%) ISO 6892-1:2009(B) Annex D 650 ± 50 MPa Min. 415 MPa
Elongation at Break ISO 6892-1:2009(B) Annex D 35 ± 5% Min. 30%
Young’s modulus - 180 ± 20 GPa 180 ± 20 GPa
Hardness DIN EN ISO 6508-1 - Approx. 30 HRC
Thermal Properties Test Method  
Max. Operating Temp. ASTM E1461-13 Approx. 650° C
Oxidation Resistance to ASTM E1461-13 Approx. 980° C
Chemical Composition and Physical Properties    
Chemical composition Ni
Cr
Mo
Nb
Fe
Ti
Al
Co
C
Ta
Si/Mn
Balance (> 58%)
20 - 23%
8 - 10%
3,15 - 4,15%
≤ 5%
≤ 0,4%
≤ 0,4%
≤ 1%
≤ 0,1%
≤ 0,05%
≤ 0,5%
Physical Properties Relative density Approx. 99,99 %
  Density 8,4 g/cm3
Heat Treatment Temperature Time Atmosphere
Stress Relief RT - 875°C - Inert
  875°C 30min Inert
  875°C - RT - Inert