Nickel Alloy 689 (N07252)
Nickel 689 is a nickel alloy formulated for primary forming into wrought products. Cited properties are appropriate for the aged (precipitation hardened) condition. N07252 is the UNS number for this material. Nickel Alloy 689 is the common industry name.
It has a moderately high tensile strength and a moderately low ductility among wrought nickels.
The graph bars on the material properties cards below compare nickel 689 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
350
Elastic (Young's, Tensile) Modulus
210 GPa 30 x 106 psi
Elongation at Break
23 %
Fatigue Strength
420 MPa 62 x 103 psi
Poisson's Ratio
0.29
Reduction in Area
21 %
Shear Modulus
80 GPa 12 x 106 psi
Shear Strength
790 MPa 120 x 103 psi
Tensile Strength: Ultimate (UTS)
1250 MPa 180 x 103 psi
Tensile Strength: Yield (Proof)
690 MPa 100 x 103 psi
Thermal Properties
Latent Heat of Fusion
330 J/g
Maximum Temperature: Mechanical
990 °C 1820 °F
Melting Completion (Liquidus)
1440 °C 2630 °F
Melting Onset (Solidus)
1390 °C 2540 °F
Specific Heat Capacity
450 J/kg-K 0.11 BTU/lb-°F
Thermal Expansion
12 µm/m-K
Otherwise Unclassified Properties
Base Metal Price
70 % relative
Density
8.5 g/cm3 530 lb/ft3
Embodied Carbon
11 kg CO2/kg material
Embodied Energy
150 MJ/kg 66 x 103 BTU/lb
Embodied Water
330 L/kg 39 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
240 MJ/m3
Resilience: Unit (Modulus of Resilience)
1170 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
23 points
Strength to Weight: Axial
41 points
Strength to Weight: Bending
30 points
Thermal Shock Resistance
35 points
Alloy Composition
| Ni | 48.3 to 60.9 | |
| Cr | 18 to 20 | |
| Co | 9.0 to 11 | |
| Mo | 9.0 to 10.5 | |
| Fe | 0 to 5.0 | |
| Ti | 2.3 to 2.8 | |
| Al | 0.75 to 1.3 | |
| Mn | 0 to 0.5 | |
| Si | 0 to 0.5 | |
| C | 0.1 to 0.2 | |
| 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
Welding Metallurgy and Weldability of Nickel-Base Alloys, John C. Lippold et al., 2009
Aerospace Materials, Brian Cantor et al. (editors), 2001
Engineering Properties of Nickel and Nickel Alloys, John L. Everhart, 1971
Nickel Alloys, Ulrich Heubner (editor), 1998