Inconel 625 und 718

Inconel 625


Inconel 625 ist eine Nickellegierung, die gegen hohe Temperaturen und Korrosion beständig ist. Diese Art von Material ist durch eine hohe Beständigkeit gegen Verschleiß und Bruch gekennzeichnet und bei der Herstellung von Fertigteilen zeichnet es sich durch sehr gute Verträglichkeit von mechanischer und thermischer Belastung aus, auch wenn diese einer Umgebung mit Oxidationsgefahr ausgesetzt sind.

Inconel 718


Inconel 718 ist eine Nickellegierung, die gegen hohe Temperaturen (bis zu 700°C) und Korrosion beständig ist. Dieses Material ist für hochtemperaturbeständige Teile wie Gasturbinen und Industrieanlagen geeignet, sowie für kryogene Anwendungen.


Mechanische Präzisionsarbeiten und 3D-Druck mit Metallsintern DMLS.

Technische Daten des Materials und physikalische und chemische Eigenschaften

Inconel 625

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



Inconel 718

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] - - - - - - - typ. 0.3 - 0.4 mm
typ. 0.012 – 0.016 inch
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 (50 - 55 wt-%)
Cr (17.0 - 21.0 wt-%)
Nb (4.75 - 5.5 wt-%)
Mo (2.8 - 3.3 wt-%)
Ti (0.65 - 1.15 wt-%)
Al (0.20 - 0.80 wt-%)
Co (≤ 1.0 wt-%)
Cu (≤ 0.3 wt-%)
C (≤ 0.08 wt-%)
Si, Mn (each ≤ 0.35 wt-%)
P, S (each ≤ 0.015 wt-%)
B (≤ 0.006 wt-%)
Fe (balance)
Relative density - - - - - - - approx. 100 %
Density - - - - - - - approx. 8.15 g/cm3
Mechanical properties of parts at 20°C (68°F) As Built Heat treated per AMS 5662 [3] Heat treated per AMS 5664 [4]
Tensile strength [5] in horizontal direction (XY) typ. 1060 ± 50 MPa
(154 ± 7 ksi)
- - - - - - - - - - - - - -
Tensile strength [5] in vertical direction (Z) typ. 980 ± 50 MPa
(142 ± 7 ksi)
min. 1241 MPa (180 ksi)
typ. 1400 ± 100 MPa
(203 ± 15 ksi)
min. 1241 MPa (180 ksi)
typ. 1380 ± 100 MPa
(200 ± 15 ksi)
Yield strength (Rp 0.2 %) [5] in horizontal direction (XY) typ. 780 ± 50 MPa
(113 ± 7 ksi)
- - - - - - - - - - - - - -
Yield strength (Rp 0.2 %) [5] in vertical direction (Z) typ. 634 ± 50 MPa
(92 ± 7 ksi)
min. 1034 MPa (150 ksi)
typ. 1150 ± 100 MPa
(167 ± 15 ksi)
min. 1034 MPa (150 ksi)
typ. 1240 ± 100 MPa
(180 ± 15 ksi)
Modulus of elasticity [5] in horizontal direction (XY) typ. 160 ± 20 GPa
(23 ± 3 Msi)
- - - - - - - - - - - - - -
Modulus of elasticity [5] in vertical direction (Z) - - - - - - - 170 ± 20 GPa
24.7 ± 3 Msi
170 ± 20 GPa
24.7 ± 3 Msi
Elongation at break [5] in vertical direction (XY) typ. (27 ± 5) % - - - - - - - - - - - - - -
Elongation at break [5] in vertical direction (Z) typ. (31 ± 5) % min. 12 %
typ. (15 ± 3) %
min. 12 %
typ. (18 ± 5) %
Hardness [6] approx. 30 HRC
approx. 287 HB
approx. 47 HRC
approx. 446 HB
approx. 43 HRC
approx. 400 HB
Mechanical properties of parts at high temperature (649°C, 1200°F) As Built Heat treated per AMS 5662 [3] Heat treated per AMS 5664 [4]
Tensile strength (Rm) [7] in vertical direction (Z) - - - - - - - min. 965 MPa (140 ksi)
typ. 1170 ± 50 MPa
(170 ± 7 ksi)
typ. 1210 ± 50 MPa
(175 ± 7 ksi)
Yield strength (Rp 0.2 %) [7] in vertical direction (Z) - - - - - - - min. 862 MPa (125 ksi)
typ. 970 ± 50 MPa
(141 ± 7 ksi)
typ. 1010 ± 50 MPa
(146 ± 7 ksi)
Elongation at break [7] in vertical direction (Z) - - - - - - - min. 6 %
typ. (16 ± 3) %
typ. (20 ± 3) %
Stress-Rupture Properties [8] in vertical direction (Z) - - - - - - - min. 23 hours at stress
level 689 MPa
(100 ksi)
- - - - - - -
    51 ± 5 hours
(final applied stress to
rupture 792.5 MPa / 115 ksi)
81 ± 10 hours
(final applied stress to
rupture 861.5 MPa / 125 ksi)
Thermal properties of parts Test Method Heat treated per AMS 5662
Coefficient of thermal expansion over 25 - 200 °C (36 - 390 °F) - - - - - - - approx. 12.5 - 13.0 x 10-6 m/m°C
Coefficient of thermal expansion over 25 - 750 °C (36 - 930 °F) - - - - - - - approx. 16.6 - 17.2 x 10-6 m/m°C
Maximum operating temperature for parts under load - - - - - - - approx. 650 °C
approx. 1200 °F
Oxidation resistance up to - - - - - - - 980 °C
1800 °F

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