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SAE-AISI T8 Steel vs. N08904 Stainless Steel

Both SAE-AISI T8 steel and N08904 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 N08904 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 78
79
Tensile Strength: Ultimate (UTS), MPa 780 to 2140
540

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Melting Completion (Liquidus), °C 1730
1440
Melting Onset (Solidus), °C 1670
1390
Specific Heat Capacity, J/kg-K 420
470
Thermal Conductivity, W/m-K 18
12
Thermal Expansion, µm/m-K 12
16

Otherwise Unclassified Properties

Base Metal Price, % relative 45
32
Density, g/cm3 9.0
8.1
Embodied Carbon, kg CO2/kg material 10
5.8
Embodied Energy, MJ/kg 160
79
Embodied Water, L/kg 120
200

Common Calculations

PREN (Pitting Resistance) 30
37
Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 24 to 66
19
Strength to Weight: Bending, points 21 to 41
18
Thermal Diffusivity, mm2/s 4.8
3.1
Thermal Shock Resistance, points 24 to 66
12

Alloy Composition

Carbon (C), % 0.75 to 0.85
0 to 0.020
Chromium (Cr), % 3.8 to 4.5
19 to 23
Cobalt (Co), % 4.3 to 5.8
0
Copper (Cu), % 0 to 0.25
1.0 to 2.0
Iron (Fe), % 69.3 to 75.4
38.8 to 53
Manganese (Mn), % 0.2 to 0.4
0 to 2.0
Molybdenum (Mo), % 0.4 to 1.0
4.0 to 5.0
Nickel (Ni), % 0 to 0.3
23 to 28
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0 to 0.030
0 to 0.045
Silicon (Si), % 0.2 to 0.4
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.035
Tungsten (W), % 13.3 to 14.8
0
Vanadium (V), % 1.8 to 2.4
0