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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

Nickel (Ni) 60.9 to 70
Molybdenum (Mo) 30 to 33
Iron (Fe) 0 to 3.0
Manganese (Mn) 0 to 1.0
Silicon (Si) 0 to 1.0
Chromium (Cr) 0 to 1.0
Carbon (C) 0 to 0.070
Phosphorus (P) 0 to 0.040
Sulfur (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