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Grade N7M Nickel vs. Nickel 690

Both grade N7M nickel and nickel 690 are nickel alloys. They have 65% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is grade N7M nickel and the bottom bar is nickel 690.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 22
3.4 to 34
Fatigue Strength, MPa 190
180 to 300
Poisson's Ratio 0.31
0.28
Shear Modulus, GPa 85
79
Tensile Strength: Ultimate (UTS), MPa 590
640 to 990
Tensile Strength: Yield (Proof), MPa 310
250 to 760

Thermal Properties

Latent Heat of Fusion, J/g 320
320
Maximum Temperature: Mechanical, °C 900
1010
Melting Completion (Liquidus), °C 1650
1380
Melting Onset (Solidus), °C 1590
1340
Specific Heat Capacity, J/kg-K 390
470
Thermal Expansion, µm/m-K 9.9
14

Otherwise Unclassified Properties

Base Metal Price, % relative 75
50
Density, g/cm3 9.3
8.3
Embodied Carbon, kg CO2/kg material 16
8.2
Embodied Energy, MJ/kg 200
120
Embodied Water, L/kg 270
290

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
31 to 170
Resilience: Unit (Modulus of Resilience), kJ/m3 220
160 to 1440
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 18
21 to 33
Strength to Weight: Bending, points 17
20 to 27
Thermal Shock Resistance, points 19
16 to 25

Alloy Composition

Carbon (C), % 0 to 0.070
0 to 0.050
Chromium (Cr), % 0 to 1.0
27 to 31
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 0 to 3.0
7.0 to 11
Manganese (Mn), % 0 to 1.0
0 to 0.5
Molybdenum (Mo), % 30 to 33
0
Nickel (Ni), % 60.9 to 70
58 to 66
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.015