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SAE-AISI P20 Steel vs. N08028 Stainless Steel

Both SAE-AISI P20 steel and N08028 stainless steel are iron alloys. They have a modest 38% of their average alloy composition in common, which, by itself, doesn't mean much. There are 22 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 P20 steel and the bottom bar is N08028 stainless steel.

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
80
Tensile Strength: Ultimate (UTS), MPa 540 to 1050
570

Thermal Properties

Latent Heat of Fusion, J/g 260
320
Melting Completion (Liquidus), °C 1460
1420
Melting Onset (Solidus), °C 1420
1370
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 45
12
Thermal Expansion, µm/m-K 12
16

Otherwise Unclassified Properties

Base Metal Price, % relative 2.8
37
Density, g/cm3 7.8
8.1
Embodied Carbon, kg CO2/kg material 1.6
6.4
Embodied Energy, MJ/kg 21
89
Embodied Water, L/kg 52
240

Common Calculations

PREN (Pitting Resistance) 2.6
39
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 19 to 37
19
Strength to Weight: Bending, points 19 to 29
19
Thermal Diffusivity, mm2/s 12
3.2
Thermal Shock Resistance, points 18 to 35
12

Alloy Composition

Carbon (C), % 0.28 to 0.4
0 to 0.030
Chromium (Cr), % 0.4 to 2.0
26 to 28
Copper (Cu), % 0 to 0.25
0.6 to 1.4
Iron (Fe), % 95.2 to 98.5
29 to 40.4
Manganese (Mn), % 0.35 to 0.71
0 to 2.5
Molybdenum (Mo), % 0.3 to 0.55
3.0 to 4.0
Nickel (Ni), % 0
30 to 34
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0.2 to 0.8
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030