Nickel Alloy 690 (N06690)
Nickel 690 is a nickel alloy formulated for primary forming into wrought products. N06690 is the UNS number for this material. Nickel Alloy 690 is the common industry name. It has a moderately high heat capacity among the wrought nickels in the database.
The properties of nickel 690 include four common variations. This page shows summary ranges across all of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare nickel 690 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
90
Elastic (Young's, Tensile) Modulus
200 GPa 29 x 106 psi
Elongation at Break
3.4 to 34 %
Fatigue Strength
180 to 300 MPa 26 to 44 x 103 psi
Poisson's Ratio
0.28
Shear Modulus
79 GPa 11 x 106 psi
Shear Strength
420 to 570 MPa 62 to 83 x 103 psi
Tensile Strength: Ultimate (UTS)
640 to 990 MPa 92 to 140 x 103 psi
Tensile Strength: Yield (Proof)
250 to 760 MPa 37 to 110 x 103 psi
Thermal Properties
Latent Heat of Fusion
320 J/g
Maximum Temperature: Mechanical
1010 °C 1860 °F
Melting Completion (Liquidus)
1380 °C 2510 °F
Melting Onset (Solidus)
1340 °C 2450 °F
Specific Heat Capacity
470 J/kg-K 0.11 BTU/lb-°F
Thermal Conductivity
14 W/m-K 7.9 BTU/h-ft-°F
Thermal Expansion
14 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
1.5 % IACS
Electrical Conductivity: Equal Weight (Specific)
1.6 % IACS
Otherwise Unclassified Properties
Base Metal Price
50 % relative
Density
8.3 g/cm3 520 lb/ft3
Embodied Carbon
8.2 kg CO2/kg material
Embodied Energy
120 MJ/kg 50 x 103 BTU/lb
Embodied Water
290 L/kg 34 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
31 to 170 MJ/m3
Resilience: Unit (Modulus of Resilience)
160 to 1440 kJ/m3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
21 to 33 points
Strength to Weight: Bending
20 to 27 points
Thermal Diffusivity
3.5 mm2/s
Thermal Shock Resistance
16 to 25 points
Alloy Composition
| Ni | 58 to 66 | |
| Cr | 27 to 31 | |
| Fe | 7.0 to 11 | |
| Mn | 0 to 0.5 | |
| Si | 0 to 0.5 | |
| Cu | 0 to 0.5 | |
| C | 0 to 0.050 | |
| S | 0 to 0.015 |
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
ASTM B564: Standard Specification for Nickel Alloy Forgings
ASTM B247: Standard Specification for Aluminum and Aluminum-Alloy Die Forgings, Hand Forgings, and Rolled Ring Forgings
ASM Specialty Handbook: Nickel, Cobalt, and Their Alloys, Joseph R. Davis (editor), 2000
Machining of Stainless Steels and Super Alloys: Traditional and Nontraditional Techniques, Helmi A. Youssef, 2016
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