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SAE-AISI O7 Steel vs. N06985 Nickel

SAE-AISI O7 steel belongs to the iron alloys classification, while N06985 nickel belongs to the nickel alloys. They have a modest 22% of their average alloy composition in common, which, by itself, doesn't mean much. There are 23 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI O7 steel and the bottom bar is N06985 nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
210
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
80
Tensile Strength: Ultimate (UTS), MPa 680 to 2110
690

Thermal Properties

Latent Heat of Fusion, J/g 250
320
Melting Completion (Liquidus), °C 1480
1350
Melting Onset (Solidus), °C 1430
1260
Specific Heat Capacity, J/kg-K 470
450
Thermal Conductivity, W/m-K 41
10
Thermal Expansion, µm/m-K 12
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
1.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.7
1.6

Otherwise Unclassified Properties

Base Metal Price, % relative 6.0
55
Density, g/cm3 7.9
8.4
Embodied Carbon, kg CO2/kg material 2.3
8.8
Embodied Energy, MJ/kg 33
120
Embodied Water, L/kg 52
270

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 24 to 74
23
Strength to Weight: Bending, points 22 to 46
21
Thermal Diffusivity, mm2/s 11
2.6
Thermal Shock Resistance, points 23 to 70
16

Alloy Composition

Carbon (C), % 1.1 to 1.3
0 to 0.015
Chromium (Cr), % 0.35 to 0.85
21 to 23.5
Cobalt (Co), % 0
0 to 5.0
Copper (Cu), % 0 to 0.25
1.5 to 2.5
Iron (Fe), % 92.9 to 97.6
18 to 21
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0 to 0.3
6.0 to 8.0
Nickel (Ni), % 0 to 0.3
35.9 to 53.5
Niobium (Nb), % 0
0 to 0.5
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0 to 0.6
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 1.0 to 2.0
0 to 1.5
Vanadium (V), % 0 to 0.4
0