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SAE-AISI P3 Steel vs. S20161 Stainless Steel

Both SAE-AISI P3 steel and S20161 stainless steel are iron alloys. They have 72% of their average alloy composition in common. 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 P3 steel and the bottom bar is S20161 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
76
Tensile Strength: Ultimate (UTS), MPa 410 to 1980
980

Thermal Properties

Latent Heat of Fusion, J/g 250
330
Melting Completion (Liquidus), °C 1460
1380
Melting Onset (Solidus), °C 1420
1330
Specific Heat Capacity, J/kg-K 470
490
Thermal Conductivity, W/m-K 46
15
Thermal Expansion, µm/m-K 12
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 2.8
12
Density, g/cm3 7.9
7.5
Embodied Carbon, kg CO2/kg material 1.5
2.7
Embodied Energy, MJ/kg 20
39
Embodied Water, L/kg 50
130

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
26
Strength to Weight: Axial, points 15 to 70
36
Strength to Weight: Bending, points 16 to 44
29
Thermal Diffusivity, mm2/s 12
4.0
Thermal Shock Resistance, points 14 to 65
22

Alloy Composition

Carbon (C), % 0 to 0.1
0 to 0.15
Chromium (Cr), % 0.4 to 0.75
15 to 18
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 96.3 to 98.4
65.6 to 73.9
Manganese (Mn), % 0.2 to 0.6
4.0 to 6.0
Nickel (Ni), % 1.0 to 1.5
4.0 to 6.0
Nitrogen (N), % 0
0.080 to 0.2
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0 to 0.4
3.0 to 4.0
Sulfur (S), % 0 to 0.030
0 to 0.040