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Austempered Cast Iron vs. N08366 Stainless Steel

Both austempered cast iron and N08366 stainless steel are iron alloys. They have 49% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is austempered cast iron and the bottom bar is N08366 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 270 to 490
180
Elastic (Young's, Tensile) Modulus, GPa 180
210
Elongation at Break, % 1.1 to 13
34
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 62 to 69
80
Tensile Strength: Ultimate (UTS), MPa 860 to 1800
590
Tensile Strength: Yield (Proof), MPa 560 to 1460
240

Thermal Properties

Latent Heat of Fusion, J/g 280
310
Melting Completion (Liquidus), °C 1380
1460
Melting Onset (Solidus), °C 1340
1410
Specific Heat Capacity, J/kg-K 490
460
Thermal Conductivity, W/m-K 42
13
Thermal Expansion, µm/m-K 13
16

Otherwise Unclassified Properties

Base Metal Price, % relative 2.9
33
Density, g/cm3 7.5
8.1
Embodied Carbon, kg CO2/kg material 1.8
6.2
Embodied Energy, MJ/kg 25
84
Embodied Water, L/kg 48
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19 to 95
160
Resilience: Unit (Modulus of Resilience), kJ/m3 880 to 3970
150
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 32 to 66
20
Strength to Weight: Bending, points 27 to 44
19
Thermal Diffusivity, mm2/s 11
3.4
Thermal Shock Resistance, points 25 to 53
13

Alloy Composition

Aluminum (Al), % 0 to 0.050
0
Arsenic (As), % 0 to 0.020
0
Carbon (C), % 3.4 to 3.8
0 to 0.035
Chromium (Cr), % 0 to 0.1
20 to 22
Copper (Cu), % 0 to 0.8
0
Iron (Fe), % 89.6 to 94
42.4 to 50.5
Magnesium (Mg), % 0 to 0.040
0
Manganese (Mn), % 0.3 to 0.4
0 to 2.0
Molybdenum (Mo), % 0 to 0.3
6.0 to 7.0
Nickel (Ni), % 0 to 2.0
23.5 to 25.5
Phosphorus (P), % 0 to 0.040
0 to 0.040
Selenium (Se), % 0 to 0.030
0
Silicon (Si), % 2.3 to 2.7
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.030
Tin (Sn), % 0 to 0.020
0
Vanadium (V), % 0 to 0.1
0