Grade N7M (J30007) Cast Nickel
Grade N7M nickel is a nickel alloy formulated for casting. Cited properties are appropriate for the heat treated (HT) condition. N7M is the ASTM designation for this material. J30007 is the UNS number.
It has a moderately low heat capacity among cast nickels. In addition, it has the highest melting temperature and a moderately high embodied energy.
The graph bars on the material properties cards below compare grade N7M nickel to: cast 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
220 GPa 32 x 106 psi
Elongation at Break
22 %
Fatigue Strength
190 MPa 28 x 103 psi
Poisson's Ratio
0.31
Shear Modulus
85 GPa 12 x 106 psi
Tensile Strength: Ultimate (UTS)
590 MPa 85 x 103 psi
Tensile Strength: Yield (Proof)
310 MPa 45 x 103 psi
Thermal Properties
Latent Heat of Fusion
320 J/g
Maximum Temperature: Mechanical
900 °C 1660 °F
Melting Completion (Liquidus)
1650 °C 3000 °F
Melting Onset (Solidus)
1590 °C 2900 °F
Specific Heat Capacity
390 J/kg-K 0.092 BTU/lb-°F
Thermal Expansion
9.9 µm/m-K
Otherwise Unclassified Properties
Base Metal Price
75 % relative
Density
9.3 g/cm3 580 lb/ft3
Embodied Carbon
16 kg CO2/kg material
Embodied Energy
200 MJ/kg 87 x 103 BTU/lb
Embodied Water
270 L/kg 32 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
110 MJ/m3
Resilience: Unit (Modulus of Resilience)
220 kJ/m3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
22 points
Strength to Weight: Axial
18 points
Strength to Weight: Bending
17 points
Thermal Shock Resistance
19 points
Alloy Composition
| Ni | 60.9 to 70 | |
| Mo | 30 to 33 | |
| Fe | 0 to 3.0 | |
| Mn | 0 to 1.0 | |
| Si | 0 to 1.0 | |
| Cr | 0 to 1.0 | |
| C | 0 to 0.070 | |
| P | 0 to 0.040 | |
| S | 0 to 0.030 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
ASTM A494: Standard Specification for Castings, Nickel and Nickel Alloy
Microstructure of Superalloys, Madeleine Durand-Charre, 1998
Engineering Properties of Nickel and Nickel Alloys, John L. Everhart, 1971
Nickel Alloys, Ulrich Heubner (editor), 1998