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Grade N7M Nickel vs. SAE-AISI A8 Steel

Grade N7M nickel belongs to the nickel alloys classification, while SAE-AISI A8 steel belongs to the iron alloys. There are 19 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is grade N7M nickel and the bottom bar is SAE-AISI A8 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Poisson's Ratio 0.31
0.29
Shear Modulus, GPa 85
74
Tensile Strength: Ultimate (UTS), MPa 590
700 to 1920

Thermal Properties

Latent Heat of Fusion, J/g 320
270
Melting Completion (Liquidus), °C 1650
1480
Melting Onset (Solidus), °C 1590
1430
Specific Heat Capacity, J/kg-K 390
470
Thermal Expansion, µm/m-K 9.9
12

Otherwise Unclassified Properties

Base Metal Price, % relative 75
8.5
Density, g/cm3 9.3
7.9
Embodied Carbon, kg CO2/kg material 16
2.3
Embodied Energy, MJ/kg 200
31
Embodied Water, L/kg 270
73

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 18
25 to 68
Strength to Weight: Bending, points 17
22 to 44
Thermal Shock Resistance, points 19
22 to 62

Alloy Composition

Carbon (C), % 0 to 0.070
0.5 to 0.6
Chromium (Cr), % 0 to 1.0
4.8 to 5.5
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 0 to 3.0
88.5 to 91.9
Manganese (Mn), % 0 to 1.0
0 to 0.5
Molybdenum (Mo), % 30 to 33
1.2 to 1.7
Nickel (Ni), % 60.9 to 70
0 to 0.3
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.0
0.75 to 1.1
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 0
1.0 to 1.5