Nickel Alloy 684 (2.4983, N07500)
Nickel 684 is a nickel alloy formulated for primary forming into wrought products. Cited properties are appropriate for the aged (precipitation hardened) condition. 2.4983 is the EN numeric designation for this material. N07500 is the UNS number. And Nickel Alloy 684 is the common industry name.
It has a moderately low ductility among wrought nickels. In addition, it has a moderately high heat capacity and a moderately high tensile strength.
The graph bars on the material properties cards below compare nickel 684 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
Brinell Hardness
310
Elastic (Young's, Tensile) Modulus
200 GPa 29 x 106 psi
Elongation at Break
11 %
Fatigue Strength
390 MPa 56 x 103 psi
Poisson's Ratio
0.29
Reduction in Area
17 %
Shear Modulus
76 GPa 11 x 106 psi
Shear Strength
710 MPa 100 x 103 psi
Tensile Strength: Ultimate (UTS)
1190 MPa 170 x 103 psi
Tensile Strength: Yield (Proof)
800 MPa 120 x 103 psi
Thermal Properties
Latent Heat of Fusion
320 J/g
Maximum Temperature: Mechanical
1000 °C 1830 °F
Melting Completion (Liquidus)
1370 °C 2500 °F
Melting Onset (Solidus)
1320 °C 2420 °F
Specific Heat Capacity
470 J/kg-K 0.11 BTU/lb-°F
Thermal Expansion
13 µm/m-K
Otherwise Unclassified Properties
Base Metal Price
75 % relative
Density
8.3 g/cm3 520 lb/ft3
Embodied Carbon
10 kg CO2/kg material
Embodied Energy
140 MJ/kg 61 x 103 BTU/lb
Embodied Water
360 L/kg 43 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
120 MJ/m3
Resilience: Unit (Modulus of Resilience)
1610 kJ/m3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
23 points
Strength to Weight: Axial
40 points
Strength to Weight: Bending
30 points
Thermal Shock Resistance
34 points
Alloy Composition
| Ni | 42.7 to 64 | |
| Cr | 15 to 20 | |
| Co | 13 to 20 | |
| Mo | 3.0 to 5.0 | |
| Al | 2.5 to 3.3 | |
| Ti | 2.5 to 3.3 | |
| Fe | 0 to 4.0 | |
| Mn | 0 to 0.75 | |
| Si | 0 to 0.75 | |
| C | 0 to 0.15 | |
| Cu | 0 to 0.15 | |
| P | 0 to 0.015 | |
| S | 0 to 0.015 | |
| B | 0.0030 to 0.010 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
ASTM B637: Standard Specification for Precipitation-Hardening Nickel Alloy Bars, Forgings, and Forging Stock for High-Temperature Service
Microstructure of Superalloys, Madeleine Durand-Charre, 1998
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