EN 2.4668 (NiCr19Fe19Nb5Mo3) Nickel Alloy
EN 2.4668 nickel is a nickel alloy formulated for primary forming into wrought products. Cited properties are appropriate for the aged (precipitation hardened) condition. 2.4668 is the EN numeric designation for this material. NiCr19Fe19Nb5Mo3 is the EN chemical designation.
It has a moderately high tensile strength among wrought nickels. In addition, it has a moderately high embodied energy and a moderately low ductility.
The graph bars on the material properties cards below compare EN 2.4668 nickel to: wrought nickels (top), all nickel alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Mechanical Properties
Elastic (Young's, Tensile) Modulus
190 GPa 28 x 106 psi
Elongation at Break
14 %
Fatigue Strength
590 MPa 86 x 103 psi
Impact Strength: V-Notched Charpy
14 J 10 ft-lb
Poisson's Ratio
0.29
Shear Modulus
75 GPa 11 x 106 psi
Shear Strength
840 MPa 120 x 103 psi
Tensile Strength: Ultimate (UTS)
1390 MPa 200 x 103 psi
Tensile Strength: Yield (Proof)
1160 MPa 170 x 103 psi
Thermal Properties
Latent Heat of Fusion
310 J/g
Maximum Temperature: Mechanical
980 °C 1790 °F
Melting Completion (Liquidus)
1460 °C 2660 °F
Melting Onset (Solidus)
1410 °C 2570 °F
Specific Heat Capacity
450 J/kg-K 0.11 BTU/lb-°F
Thermal Conductivity
13 W/m-K 7.5 BTU/h-ft-°F
Thermal Expansion
13 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
1.4 % IACS
Electrical Conductivity: Equal Weight (Specific)
1.5 % IACS
Otherwise Unclassified Properties
Base Metal Price
75 % relative
Density
8.3 g/cm3 520 lb/ft3
Embodied Carbon
13 kg CO2/kg material
Embodied Energy
190 MJ/kg 80 x 103 BTU/lb
Embodied Water
250 L/kg 30 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
180 MJ/m3
Resilience: Unit (Modulus of Resilience)
3490 kJ/m3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
23 points
Strength to Weight: Axial
46 points
Strength to Weight: Bending
33 points
Thermal Diffusivity
3.5 mm2/s
Thermal Shock Resistance
40 points
Alloy Composition
| Ni | 50 to 55 | |
| Cr | 17 to 21 | |
| Fe | 11.2 to 24.6 | |
| Nb | 4.7 to 5.5 | |
| Mo | 2.8 to 3.3 | |
| Ti | 0.6 to 1.2 | |
| Co | 0 to 1.0 | |
| Al | 0.3 to 0.7 | |
| Mn | 0 to 0.35 | |
| Si | 0 to 0.35 | |
| Cu | 0 to 0.3 | |
| C | 0.020 to 0.080 | |
| P | 0 to 0.015 | |
| S | 0 to 0.015 | |
| B | 0.0020 to 0.0060 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
EN 10302: Creep resisting steels, nickel and cobalt alloys
EN 10269: Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties
Engineering Properties of Nickel and Nickel Alloys, John L. Everhart, 1971
Nickel Alloys, Ulrich Heubner (editor), 1998
CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015