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N08031 Stainless Steel vs. SAE-AISI P20 Steel

Both N08031 stainless steel and SAE-AISI P20 steel are iron alloys. They have a modest 35% 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 (10, in this case) are not shown.

For each property being compared, the top bar is N08031 stainless steel and the bottom bar is SAE-AISI P20 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 81
73
Tensile Strength: Ultimate (UTS), MPa 730
540 to 1050

Thermal Properties

Latent Heat of Fusion, J/g 310
260
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1390
1420
Specific Heat Capacity, J/kg-K 460
470
Thermal Conductivity, W/m-K 12
45
Thermal Expansion, µm/m-K 18
12

Otherwise Unclassified Properties

Base Metal Price, % relative 39
2.8
Density, g/cm3 8.1
7.8
Embodied Carbon, kg CO2/kg material 7.1
1.6
Embodied Energy, MJ/kg 96
21
Embodied Water, L/kg 240
52

Common Calculations

PREN (Pitting Resistance) 52
2.6
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 25
19 to 37
Strength to Weight: Bending, points 22
19 to 29
Thermal Diffusivity, mm2/s 3.1
12
Thermal Shock Resistance, points 14
18 to 35

Alloy Composition

Carbon (C), % 0 to 0.015
0.28 to 0.4
Chromium (Cr), % 26 to 28
0.4 to 2.0
Copper (Cu), % 1.0 to 1.4
0 to 0.25
Iron (Fe), % 29 to 36.9
95.2 to 98.5
Manganese (Mn), % 0 to 2.0
0.35 to 0.71
Molybdenum (Mo), % 6.0 to 7.0
0.3 to 0.55
Nickel (Ni), % 30 to 32
0
Nitrogen (N), % 0.15 to 0.25
0
Phosphorus (P), % 0 to 0.020
0 to 0.030
Silicon (Si), % 0 to 0.3
0.2 to 0.8
Sulfur (S), % 0 to 0.010
0 to 0.030