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SAE-AISI P4 Steel vs. Nickel 718

SAE-AISI P4 steel belongs to the iron alloys classification, while nickel 718 belongs to the nickel alloys. They have a modest 24% 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 (12, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI P4 steel and the bottom bar is nickel 718.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
75
Tensile Strength: Ultimate (UTS), MPa 390 to 1980
930 to 1530

Thermal Properties

Latent Heat of Fusion, J/g 260
310
Melting Completion (Liquidus), °C 1460
1340
Melting Onset (Solidus), °C 1420
1260
Specific Heat Capacity, J/kg-K 470
450
Thermal Conductivity, W/m-K 41
11
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.1
1.4
Electrical Conductivity: Equal Weight (Specific), % IACS 9.3
1.5

Otherwise Unclassified Properties

Base Metal Price, % relative 4.4
75
Density, g/cm3 7.8
8.3
Embodied Carbon, kg CO2/kg material 1.8
13
Embodied Energy, MJ/kg 23
190
Embodied Water, L/kg 68
250

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 14 to 70
31 to 51
Strength to Weight: Bending, points 15 to 45
25 to 35
Thermal Diffusivity, mm2/s 11
3.0
Thermal Shock Resistance, points 13 to 64
27 to 44

Alloy Composition

Aluminum (Al), % 0
0.2 to 0.8
Boron (B), % 0
0 to 0.0060
Carbon (C), % 0 to 0.12
0 to 0.080
Chromium (Cr), % 4.0 to 5.3
17 to 21
Cobalt (Co), % 0
0 to 1.0
Copper (Cu), % 0 to 0.25
0 to 0.3
Iron (Fe), % 92.3 to 95.3
11.1 to 24.6
Manganese (Mn), % 0.2 to 0.6
0 to 0.35
Molybdenum (Mo), % 0.4 to 1.0
2.8 to 3.3
Nickel (Ni), % 0
50 to 55
Niobium (Nb), % 0
4.8 to 5.5
Phosphorus (P), % 0 to 0.030
0 to 0.015
Silicon (Si), % 0.1 to 0.4
0 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.015
Titanium (Ti), % 0
0.65 to 1.2