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SAE-AISI P21 Steel vs. N08120 Nickel

SAE-AISI P21 steel belongs to the iron alloys classification, while N08120 nickel belongs to the nickel alloys. They have a modest 38% of their average alloy composition in common, which, by itself, doesn't mean much. There are 21 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 SAE-AISI P21 steel and the bottom bar is N08120 nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
79
Tensile Strength: Ultimate (UTS), MPa 1130
700

Thermal Properties

Latent Heat of Fusion, J/g 250
310
Melting Completion (Liquidus), °C 1450
1420
Melting Onset (Solidus), °C 1410
1370
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 41
11
Thermal Expansion, µm/m-K 12
14

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
45
Density, g/cm3 7.9
8.2
Embodied Carbon, kg CO2/kg material 2.3
7.2
Embodied Energy, MJ/kg 32
100
Embodied Water, L/kg 62
240

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 40
24
Strength to Weight: Bending, points 31
21
Thermal Diffusivity, mm2/s 11
3.0
Thermal Shock Resistance, points 37
17

Alloy Composition

Aluminum (Al), % 0
0 to 0.4
Boron (B), % 0
0 to 0.010
Carbon (C), % 0.18 to 0.22
0.020 to 0.1
Chromium (Cr), % 0 to 0.5
23 to 27
Cobalt (Co), % 1.1 to 1.3
0 to 3.0
Copper (Cu), % 0 to 0.25
0 to 0.5
Iron (Fe), % 92.1 to 94.2
21 to 41.4
Manganese (Mn), % 0.35 to 0.72
0 to 1.5
Molybdenum (Mo), % 0
0 to 2.5
Nickel (Ni), % 3.9 to 4.3
35 to 39
Niobium (Nb), % 0
0.4 to 0.9
Nitrogen (N), % 0
0.15 to 0.3
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.2 to 0.4
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0
0 to 0.2
Tungsten (W), % 0
0 to 2.5
Vanadium (V), % 0.15 to 0.25
0