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S33550 Stainless Steel vs. SAE-AISI P2 Steel

Both S33550 stainless steel and SAE-AISI P2 steel are iron alloys. They have 55% of their average alloy composition in common. There are 23 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 S33550 stainless steel and the bottom bar is SAE-AISI P2 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 79
73
Tensile Strength: Ultimate (UTS), MPa 680
330 to 1980

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Melting Completion (Liquidus), °C 1400
1460
Melting Onset (Solidus), °C 1360
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
46
Thermal Expansion, µm/m-K 16
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 24
2.7
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 4.3
1.5
Embodied Energy, MJ/kg 61
20
Embodied Water, L/kg 190
51

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 24
12 to 70
Strength to Weight: Bending, points 22
14 to 45
Thermal Diffusivity, mm2/s 3.9
12
Thermal Shock Resistance, points 15
11 to 65

Alloy Composition

Carbon (C), % 0.040 to 0.1
0 to 0.1
Cerium (Ce), % 0.025 to 0.070
0
Chromium (Cr), % 25 to 28
0.75 to 1.3
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 48.8 to 58.2
96.6 to 98.8
Lanthanum (La), % 0.025 to 0.070
0
Manganese (Mn), % 0 to 1.5
0.1 to 0.4
Molybdenum (Mo), % 0
0.15 to 0.4
Nickel (Ni), % 16.5 to 20
0.1 to 0.5
Niobium (Nb), % 0.050 to 0.15
0
Nitrogen (N), % 0.18 to 0.25
0
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.0
0.1 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.030