UNS N09777 Nickel-Iron Alloy
N09777 nickel is a nickel alloy formulated for primary forming into wrought products. Cited properties are appropriate for the annealed condition. It has the lowest base cost among wrought nickels. In addition, it has a moderately low embodied energy and a moderately low tensile strength.
The graph bars on the material properties cards below compare N09777 nickel 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 29 x 106 psi
Elongation at Break
39 %
Fatigue Strength
190 MPa 27 x 103 psi
Poisson's Ratio
0.29
Reduction in Area
57 %
Shear Modulus
77 GPa 11 x 106 psi
Shear Strength
400 MPa 57 x 103 psi
Tensile Strength: Ultimate (UTS)
580 MPa 84 x 103 psi
Tensile Strength: Yield (Proof)
240 MPa 34 x 103 psi
Thermal Properties
Latent Heat of Fusion
300 J/g
Maximum Temperature: Mechanical
960 °C 1770 °F
Melting Completion (Liquidus)
1440 °C 2630 °F
Melting Onset (Solidus)
1390 °C 2540 °F
Specific Heat Capacity
460 J/kg-K 0.11 BTU/lb-°F
Thermal Expansion
13 µm/m-K
Otherwise Unclassified Properties
Base Metal Price
38 % relative
Density
8.1 g/cm3 510 lb/ft3
Embodied Carbon
7.4 kg CO2/kg material
Embodied Energy
100 MJ/kg 45 x 103 BTU/lb
Embodied Water
200 L/kg 24 gal/lb
Common Calculations
PREN (Pitting Resistance)
30
Resilience: Ultimate (Unit Rupture Work)
180 MJ/m3
Resilience: Unit (Modulus of Resilience)
140 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
20 points
Strength to Weight: Bending
19 points
Thermal Shock Resistance
16 points
Alloy Composition
| Ni | 34 to 42 | |
| Fe | 28.5 to 47.5 | |
| Cr | 14 to 19 | |
| Mo | 2.5 to 5.5 | |
| Ti | 2.0 to 3.0 | |
| Mn | 0 to 1.0 | |
| Si | 0 to 0.5 | |
| Al | 0 to 0.35 | |
| Nb | 0 to 0.1 | |
| C | 0 to 0.030 | |
| P | 0 to 0.030 | |
| S | 0 to 0.010 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
ASTM B805: Standard Specification for Precipitation Hardening Nickel Alloys UNS N07716, N07725, N07773, N07776, and N09777, Bar and Wire
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