Nickel Alloy 693 (N06693)
Nickel 693 is a nickel alloy formulated for primary forming into wrought products. Cited properties are appropriate for the annealed condition. N06693 is the UNS number for this material. Nickel Alloy 693 is the common industry name.
It has a moderately high heat capacity among the wrought nickels in the database.
The graph bars on the material properties cards below compare nickel 693 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
200 GPa 28 x 106 psi
Elongation at Break
34 %
Fatigue Strength
230 MPa 33 x 103 psi
Poisson's Ratio
0.28
Shear Modulus
76 GPa 11 x 106 psi
Shear Strength
440 MPa 64 x 103 psi
Tensile Strength: Ultimate (UTS)
660 MPa 96 x 103 psi
Tensile Strength: Yield (Proof)
310 MPa 45 x 103 psi
Thermal Properties
Latent Heat of Fusion
330 J/g
Maximum Temperature: Mechanical
1010 °C 1860 °F
Melting Completion (Liquidus)
1350 °C 2470 °F
Melting Onset (Solidus)
1310 °C 2380 °F
Specific Heat Capacity
480 J/kg-K 0.11 BTU/lb-°F
Thermal Conductivity
9.1 W/m-K 5.3 BTU/h-ft-°F
Thermal Expansion
13 µm/m-K
Otherwise Unclassified Properties
Base Metal Price
60 % relative
Density
8.1 g/cm3 510 lb/ft3
Embodied Carbon
9.9 kg CO2/kg material
Embodied Energy
140 MJ/kg 62 x 103 BTU/lb
Embodied Water
320 L/kg 39 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
190 MJ/m3
Resilience: Unit (Modulus of Resilience)
250 kJ/m3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
23 points
Strength to Weight: Bending
21 points
Thermal Diffusivity
2.3 mm2/s
Thermal Shock Resistance
19 points
Alloy Composition
| Ni | 53.3 to 67.5 | |
| Cr | 27 to 31 | |
| Fe | 2.5 to 6.0 | |
| Al | 2.5 to 4.0 | |
| Nb | 0.5 to 2.5 | |
| Mn | 0 to 1.0 | |
| Ti | 0 to 1.0 | |
| Si | 0 to 0.5 | |
| Cu | 0 to 0.5 | |
| C | 0 to 0.15 | |
| S | 0 to 0.010 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
ASTM B166: Standard Specification for Nickel-Chromium-Iron Alloys (UNS N06600, N06601, N06603, N06690, N06693, N06025, and N06045) and Nickel-Chromium-Cobalt-Molybdenum Alloy (UNS N06617) Rod, Bar, and Wire
ASTM B167: Standard Specification for Nickel-Chromium-Iron Alloys (UNS N06600, N06601, N06603, N06690, N06693, N06025, and N06045) and Nickel-Chromium-Cobalt-Molybdenum Alloy (UNS N06617) Seamless Pipe and Tube
ASTM B168: Standard Specification Nickel-Chromium-Iron Alloys (UNS N06600, N06601, N06603, N06690, N06693, N06025, and N06045) and Nickel-Chromium-Cobalt-Molybdenum Alloy (UNS N06617) Plate, Sheet, and Strip
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