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SAE-AISI T8 Steel vs. S66286 Stainless Steel

Both SAE-AISI T8 steel and S66286 stainless steel are iron alloys. They have 60% of their average alloy composition in common. 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 SAE-AISI T8 steel and the bottom bar is S66286 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 78
75
Tensile Strength: Ultimate (UTS), MPa 780 to 2140
620 to 1020

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Melting Completion (Liquidus), °C 1730
1430
Melting Onset (Solidus), °C 1670
1370
Specific Heat Capacity, J/kg-K 420
470
Thermal Conductivity, W/m-K 18
15
Thermal Expansion, µm/m-K 12
17

Otherwise Unclassified Properties

Base Metal Price, % relative 45
26
Density, g/cm3 9.0
7.9
Embodied Carbon, kg CO2/kg material 10
6.0
Embodied Energy, MJ/kg 160
87
Embodied Water, L/kg 120
170

Common Calculations

PREN (Pitting Resistance) 30
19
Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 24 to 66
22 to 36
Strength to Weight: Bending, points 21 to 41
20 to 28
Thermal Diffusivity, mm2/s 4.8
4.0
Thermal Shock Resistance, points 24 to 66
13 to 22

Alloy Composition

Aluminum (Al), % 0
0 to 0.35
Boron (B), % 0
0.0010 to 0.010
Carbon (C), % 0.75 to 0.85
0 to 0.080
Chromium (Cr), % 3.8 to 4.5
13.5 to 16
Cobalt (Co), % 4.3 to 5.8
0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 69.3 to 75.4
49.1 to 59.5
Manganese (Mn), % 0.2 to 0.4
0 to 2.0
Molybdenum (Mo), % 0.4 to 1.0
1.0 to 1.5
Nickel (Ni), % 0 to 0.3
24 to 27
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
Titanium (Ti), % 0
1.9 to 2.4
Tungsten (W), % 13.3 to 14.8
0
Vanadium (V), % 1.8 to 2.4
0.1 to 0.5

Comparable Variants