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.

Technical Data Test Method  
Typical achievable part accuracy, small parts - - - - - - - approx. ± 40 – 60 μm
Typical achievable part accuracy, large parts - - - - - - - approx. ± 0.2%
Min. wall thickness [1] - - - - - - - approx. 0.3 mm - 0.4mm
Surface roughness [2] after shot-peening - - - - - - - Ra 4 - 6.5 μm, Rz 20 - 50 μm
Surface roughness [2] after polishing - - - - - - - Rz up to < 0.5 μm
Physical and Chemical properties of parts Test Method  
Material composition - - - - - - - Ni (balance ≥ 58.00 wt-%)
Cr (20.00 - 23.00 wt-%)
Mo (8.00 - 10.00 wt-%)
Nb (3.15 - 4.15 wt-%)
Fe (≤ 5.00 wt-%)
Ti (≤ 0.40 wt-%)
Al (≤ 0.40 wt-%)
Co (≤ 1.0 wt-%)
C (≤ 0.10 wt-%)
Ta (≤ 0.05 wt-%)
Si, Mn (each ≤ 0.50 wt-%)
P, S (each ≤ 0.015 wt-%)
Relative density - - - - - - - approx. 100 %
Density - - - - - - - approx. 8.4 g/cm3
Mechanical properties of parts at 20°C (68°F) Test Method As Built Stress Relieved [4]
Tensile strength [3] in horizontal direction (XY) ISO 6892-1:2009(B)
Annex D
typ. 990 ± 50 MPa
typ. 144 ± 7 ksi
min. 827 MPa (120ksi)
typ.1040 ± 100
MPa (151 ±15 ksi)
Tensile strength [3] in vertical direction (Z) ISO 6892-1:2009(B)
Annex D
typ. 900 ± 50 MPa
typ. 131 ± 7 ksi
min. 827 MPa (120 ksi)
typ. 930 ± 100 MPa
(135 ±15 ksi)
Yield strength (Rp 0.2 %) [3] in horizontal direction (XY) ISO 6892-1:2009(B)
Annex D
typ. 725 ± 50 MPa
typ. 105 ± 7 ksi
min. 414 MPa (60 ksi)
typ. 720 ± 100 MPa
(104 ±15 ksi)
Yield strength (Rp 0.2 %) [3] in vertical direction (Z) ISO 6892-1:2009(B)
Annex D
typ. 615 ± 50 MPa
typ. 89 ± 7 ksi
min. 414 MPa (60 ksi)
typ. 650 ± 100 MPa
(94 ±15 ksi)
Modulus of elasticity [3] in horizontal direction (XY) ISO 6892-1:2009(B)
Annex D
typ. 170 ± 20 GPa
typ. 25 ± 3 Msii
typ. 170 ± 20 GPa
typ. 25 ± 3 Msi
Modulus of elasticity [3] in vertical direction (Z) ISO 6892-1:2009(B)
Annex D
typ.140 ± 20 GPa
typ. 20 ± 3 Msisi
yp. 160 ± 20 GPa
typ. 23 ± 3 Msi
Elongation at break [3] in horizontal direction (XY) ISO 6892-1:2009(B)
Annex D
typ. (35 ± 5) % min. 30 %,
typ. (35 ± 5) %
Elongation at break [3] in vertical direction (Z) ISO 6892-1:2009(B)
Annex D
(42 ± 5) % min. 30 %,
typ. (44 ± 5) %
Hardness [5] EN ISO 6508-1 - - - - - - - approx. 30 HRC (287 HB)
Thermal properties of parts Test Method  
Maximum operating temperature for parts under load - - - - - - - approx. 650 °C
approx. 1200 °F
Oxidation resistance to - - - - - - - 980 °C
1800 °F
Other Available Colors
 
Light Gray

[1] Mechanical stability is dependent on geometry (wall height etc.) and application
[2] Due to the layerwise building, the surface structure depends strongly on the orientation of the surface, for example sloping and curved surfaces exhibit a stair-step effect. The values also depend on the measurement method used. The values quoted here given an indication of what can be expected for horizontal (up-facing) or vertical surfaces.
[3] Tensile testing according to ISO 6892-1:2009 (B) Annex D, proportional test pieces, diameter of the neck area 5mm ( 0.2 inch), original gauge length 25mm ( 1 inch).
[4] Stress relieve: anneal at 870 °C (1600 °F) for 1 hour, rapid cooling
[5] Rockwell C (HRC) hardness measurement according to EN ISO 6508-1 on polished surface. Note that measured hardness can vary significantly depending on how the specimen has been prepared.
The information presented are typical values intended for reference and comparison purposes only. They should not be used for design specifications or quality control purposes.
End-use material performance can be impacted (+/-) by, but not limited to, part design, end-use conditions, etc. Actual values will vary with build conditions.
Product specifications are subject to change without notice.
The performance characteristics of these materials may vary according to application, operating conditions, or end use. Each user is responsible for determining that the material is safe, lawful and technical suitable for the intended laws and regulations. Zare makes no warranties of any kind, express or implied, including, but not limited to, the warranties of merchantability, fitness for a particular use, or warranty against patent infringement.
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