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S31803 Stainless Steel vs. SAE-AISI L2 Steel

Both S31803 stainless steel and SAE-AISI L2 steel are iron alloys. They have 70% 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 S31803 stainless steel and the bottom bar is SAE-AISI L2 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 80
72
Tensile Strength: Ultimate (UTS), MPa 710
590 to 1960

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Melting Completion (Liquidus), °C 1450
1450
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
44
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 17
2.4
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.6
1.9
Embodied Energy, MJ/kg 49
27
Embodied Water, L/kg 160
51

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25
21 to 70
Strength to Weight: Bending, points 23
20 to 45
Thermal Diffusivity, mm2/s 4.3
12
Thermal Shock Resistance, points 20
19 to 65

Alloy Composition

Carbon (C), % 0 to 0.030
0.45 to 1.0
Chromium (Cr), % 21 to 23
0.7 to 1.2
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 63.7 to 71.9
95.5 to 98.7
Manganese (Mn), % 0 to 2.0
0.1 to 0.9
Molybdenum (Mo), % 2.5 to 3.5
0 to 0.25
Nickel (Ni), % 4.5 to 6.5
0
Nitrogen (N), % 0.080 to 0.2
0
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.020
0 to 0.030
Vanadium (V), % 0
0.1 to 0.3