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Grade N7M Nickel vs. SAE-AISI A7 Steel

Grade N7M nickel belongs to the nickel alloys classification, while SAE-AISI A7 steel belongs to the iron alloys. There are 19 material properties with values for both materials. Properties with values for just one material (9, 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 A7 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
72
Tensile Strength: Ultimate (UTS), MPa 590
800 to 2150

Thermal Properties

Latent Heat of Fusion, J/g 320
260
Melting Completion (Liquidus), °C 1650
1470
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
10
Density, g/cm3 9.3
7.7
Embodied Carbon, kg CO2/kg material 16
13
Embodied Energy, MJ/kg 200
200
Embodied Water, L/kg 270
100

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 18
29 to 77
Strength to Weight: Bending, points 17
25 to 48
Thermal Shock Resistance, points 19
27 to 72

Alloy Composition

Carbon (C), % 0 to 0.070
2.0 to 2.9
Chromium (Cr), % 0 to 1.0
5.0 to 5.8
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 0 to 3.0
81.4 to 87.7
Manganese (Mn), % 0 to 1.0
0 to 0.8
Molybdenum (Mo), % 30 to 33
0.9 to 1.4
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 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 0
0.5 to 1.5
Vanadium (V), % 0
3.9 to 5.2