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Austempered Cast Iron vs. SAE-AISI T6 Steel

Both austempered cast iron and SAE-AISI T6 steel are iron alloys. They have 62% of their average alloy composition in common. There are 21 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is austempered cast iron and the bottom bar is SAE-AISI T6 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180
210
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 62 to 69
81
Tensile Strength: Ultimate (UTS), MPa 860 to 1800
880 to 2150

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Melting Completion (Liquidus), °C 1380
1830
Melting Onset (Solidus), °C 1340
1770
Specific Heat Capacity, J/kg-K 490
400
Thermal Conductivity, W/m-K 42
18
Thermal Expansion, µm/m-K 13
12

Otherwise Unclassified Properties

Base Metal Price, % relative 2.9
70
Density, g/cm3 7.5
9.5
Embodied Carbon, kg CO2/kg material 1.8
11
Embodied Energy, MJ/kg 25
170
Embodied Water, L/kg 48
160

Common Calculations

Stiffness to Weight: Axial, points 13
12
Stiffness to Weight: Bending, points 25
21
Strength to Weight: Axial, points 32 to 66
26 to 63
Strength to Weight: Bending, points 27 to 44
21 to 39
Thermal Diffusivity, mm2/s 11
4.7
Thermal Shock Resistance, points 25 to 53
26 to 64

Alloy Composition

Aluminum (Al), % 0 to 0.050
0
Arsenic (As), % 0 to 0.020
0
Carbon (C), % 3.4 to 3.8
0.75 to 0.85
Chromium (Cr), % 0 to 0.1
4.0 to 4.8
Cobalt (Co), % 0
11 to 13
Copper (Cu), % 0 to 0.8
0 to 0.25
Iron (Fe), % 89.6 to 94
55.9 to 63.5
Magnesium (Mg), % 0 to 0.040
0
Manganese (Mn), % 0.3 to 0.4
0.2 to 0.4
Molybdenum (Mo), % 0 to 0.3
0.4 to 1.0
Nickel (Ni), % 0 to 2.0
0 to 0.3
Phosphorus (P), % 0 to 0.040
0 to 0.030
Selenium (Se), % 0 to 0.030
0
Silicon (Si), % 2.3 to 2.7
0.2 to 0.4
Sulfur (S), % 0 to 0.020
0 to 0.030
Tin (Sn), % 0 to 0.020
0
Tungsten (W), % 0
18.5 to 21
Vanadium (V), % 0 to 0.1
1.5 to 2.1