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Austempered Cast Iron vs. S30441 Stainless Steel

Both austempered cast iron and S30441 stainless steel are iron alloys. They have 70% 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 S30441 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 270 to 490
170
Elastic (Young's, Tensile) Modulus, GPa 180
200
Elongation at Break, % 1.1 to 13
45
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 62 to 69
76
Tensile Strength: Ultimate (UTS), MPa 860 to 1800
580
Tensile Strength: Yield (Proof), MPa 560 to 1460
230

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Melting Completion (Liquidus), °C 1380
1420
Melting Onset (Solidus), °C 1340
1370
Specific Heat Capacity, J/kg-K 490
480
Thermal Conductivity, W/m-K 42
15
Thermal Expansion, µm/m-K 13
16

Otherwise Unclassified Properties

Base Metal Price, % relative 2.9
18
Density, g/cm3 7.5
7.8
Embodied Carbon, kg CO2/kg material 1.8
3.4
Embodied Energy, MJ/kg 25
50
Embodied Water, L/kg 48
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19 to 95
210
Resilience: Unit (Modulus of Resilience), kJ/m3 880 to 3970
140
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 32 to 66
21
Strength to Weight: Bending, points 27 to 44
20
Thermal Diffusivity, mm2/s 11
4.0
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 0.080
Chromium (Cr), % 0 to 0.1
17.5 to 19.5
Copper (Cu), % 0 to 0.8
1.5 to 2.5
Iron (Fe), % 89.6 to 94
62 to 71.7
Magnesium (Mg), % 0 to 0.040
0
Manganese (Mn), % 0.3 to 0.4
0 to 2.0
Molybdenum (Mo), % 0 to 0.3
0
Nickel (Ni), % 0 to 2.0
8.0 to 10.5
Niobium (Nb), % 0
0.1 to 0.5
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0 to 0.040
0 to 0.045
Selenium (Se), % 0 to 0.030
0
Silicon (Si), % 2.3 to 2.7
1.0 to 2.0
Sulfur (S), % 0 to 0.020
0 to 0.030
Tin (Sn), % 0 to 0.020
0
Tungsten (W), % 0
0.2 to 0.8
Vanadium (V), % 0 to 0.1
0