Nickel Alloy 685 (N07001)
Nickel 685 is a nickel alloy formulated for primary forming into wrought products. Cited properties are appropriate for the aged (precipitation hardened) condition. N07001 is the UNS number for this material. Nickel Alloy 685 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 685 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
200 GPa 29 x 106 psi
Elongation at Break
17 %
Fatigue Strength
470 MPa 68 x 103 psi
Poisson's Ratio
0.29
Reduction in Area
20 %
Shear Modulus
77 GPa 11 x 106 psi
Shear Strength
770 MPa 110 x 103 psi
Tensile Strength: Ultimate (UTS)
1250 MPa 180 x 103 psi
Tensile Strength: Yield (Proof)
850 MPa 120 x 103 psi
Thermal Properties
Latent Heat of Fusion
320 J/g
Maximum Temperature: Mechanical
1000 °C 1830 °F
Melting Completion (Liquidus)
1380 °C 2520 °F
Melting Onset (Solidus)
1330 °C 2430 °F
Specific Heat Capacity
460 J/kg-K 0.11 BTU/lb-°F
Thermal Conductivity
13 W/m-K 7.3 BTU/h-ft-°F
Thermal Expansion
12 µm/m-K
Otherwise Unclassified Properties
Base Metal Price
75 % relative
Density
8.4 g/cm3 520 lb/ft3
Embodied Carbon
10 kg CO2/kg material
Embodied Energy
140 MJ/kg 62 x 103 BTU/lb
Embodied Water
340 L/kg 41 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
190 MJ/m3
Resilience: Unit (Modulus of Resilience)
1820 kJ/m3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
23 points
Strength to Weight: Axial
42 points
Strength to Weight: Bending
31 points
Thermal Diffusivity
3.3 mm2/s
Thermal Shock Resistance
37 points
Alloy Composition
| Ni | 49.6 to 62.5 | |
| Cr | 18 to 21 | |
| Co | 12 to 15 | |
| Mo | 3.5 to 5.0 | |
| Ti | 2.8 to 3.3 | |
| Al | 1.2 to 1.6 | |
| Fe | 0 to 2.0 | |
| Mn | 0 to 1.0 | |
| Si | 0 to 0.75 | |
| Cu | 0 to 0.5 | |
| Zn | 0.020 to 0.12 | |
| C | 0.030 to 0.1 | |
| P | 0 to 0.030 | |
| S | 0 to 0.030 | |
| 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
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