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SAE-AISI T8 Steel vs. N08366 Stainless Steel

Both SAE-AISI T8 steel and N08366 stainless steel are iron alloys. They have 52% of their average alloy composition in common. 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 T8 steel and the bottom bar is N08366 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 78
80
Tensile Strength: Ultimate (UTS), MPa 780 to 2140
590

Thermal Properties

Latent Heat of Fusion, J/g 250
310
Melting Completion (Liquidus), °C 1730
1460
Melting Onset (Solidus), °C 1670
1410
Specific Heat Capacity, J/kg-K 420
460
Thermal Conductivity, W/m-K 18
13
Thermal Expansion, µm/m-K 12
16

Otherwise Unclassified Properties

Base Metal Price, % relative 45
33
Density, g/cm3 9.0
8.1
Embodied Carbon, kg CO2/kg material 10
6.2
Embodied Energy, MJ/kg 160
84
Embodied Water, L/kg 120
200

Common Calculations

PREN (Pitting Resistance) 30
42
Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 24 to 66
20
Strength to Weight: Bending, points 21 to 41
19
Thermal Diffusivity, mm2/s 4.8
3.4
Thermal Shock Resistance, points 24 to 66
13

Alloy Composition

Carbon (C), % 0.75 to 0.85
0 to 0.035
Chromium (Cr), % 3.8 to 4.5
20 to 22
Cobalt (Co), % 4.3 to 5.8
0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 69.3 to 75.4
42.4 to 50.5
Manganese (Mn), % 0.2 to 0.4
0 to 2.0
Molybdenum (Mo), % 0.4 to 1.0
6.0 to 7.0
Nickel (Ni), % 0 to 0.3
23.5 to 25.5
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.2 to 0.4
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 13.3 to 14.8
0
Vanadium (V), % 1.8 to 2.4
0