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SAE-AISI T8 Steel vs. Grey Cast Iron

Both SAE-AISI T8 steel and grey cast iron are iron alloys. They have 74% of their average alloy composition in common. There are 21 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 SAE-AISI T8 steel and the bottom bar is grey cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
180
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 78
69
Tensile Strength: Ultimate (UTS), MPa 780 to 2140
160 to 450

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Melting Completion (Liquidus), °C 1730
1380
Melting Onset (Solidus), °C 1670
1180
Specific Heat Capacity, J/kg-K 420
490
Thermal Conductivity, W/m-K 18
46
Thermal Expansion, µm/m-K 12
11

Otherwise Unclassified Properties

Base Metal Price, % relative 45
1.9
Density, g/cm3 9.0
7.5
Embodied Carbon, kg CO2/kg material 10
1.5
Embodied Energy, MJ/kg 160
21
Embodied Water, L/kg 120
44

Common Calculations

Stiffness to Weight: Axial, points 12
13
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 24 to 66
5.8 to 17
Strength to Weight: Bending, points 21 to 41
8.7 to 17
Thermal Diffusivity, mm2/s 4.8
13
Thermal Shock Resistance, points 24 to 66
6.0 to 17

Alloy Composition

Carbon (C), % 0.75 to 0.85
3.1 to 3.4
Chromium (Cr), % 3.8 to 4.5
0
Cobalt (Co), % 4.3 to 5.8
0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 69.3 to 75.4
92.1 to 93.9
Manganese (Mn), % 0.2 to 0.4
0.5 to 0.7
Molybdenum (Mo), % 0.4 to 1.0
0
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.030
0 to 0.9
Silicon (Si), % 0.2 to 0.4
2.5 to 2.8
Sulfur (S), % 0 to 0.030
0 to 0.15
Tungsten (W), % 13.3 to 14.8
0
Vanadium (V), % 1.8 to 2.4
0