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Austempered Cast Iron vs. S35135 Stainless Steel

Both austempered cast iron and S35135 stainless steel are iron alloys. They have a modest 39% of their average alloy composition in common, which, by itself, doesn't mean much. There are 23 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 S35135 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180
200
Elongation at Break, % 1.1 to 13
34
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 62 to 69
79
Tensile Strength: Ultimate (UTS), MPa 860 to 1800
590
Tensile Strength: Yield (Proof), MPa 560 to 1460
230

Thermal Properties

Latent Heat of Fusion, J/g 280
320
Melting Completion (Liquidus), °C 1380
1430
Melting Onset (Solidus), °C 1340
1380
Specific Heat Capacity, J/kg-K 490
470
Thermal Expansion, µm/m-K 13
16

Otherwise Unclassified Properties

Base Metal Price, % relative 2.9
37
Density, g/cm3 7.5
8.1
Embodied Carbon, kg CO2/kg material 1.8
6.8
Embodied Energy, MJ/kg 25
94
Embodied Water, L/kg 48
220

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19 to 95
160
Resilience: Unit (Modulus of Resilience), kJ/m3 880 to 3970
130
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 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
20 to 25
Copper (Cu), % 0 to 0.8
0 to 0.75
Iron (Fe), % 89.6 to 94
28.3 to 45
Magnesium (Mg), % 0 to 0.040
0
Manganese (Mn), % 0.3 to 0.4
0 to 1.0
Molybdenum (Mo), % 0 to 0.3
4.0 to 4.8
Nickel (Ni), % 0 to 2.0
30 to 38
Phosphorus (P), % 0 to 0.040
0 to 0.045
Selenium (Se), % 0 to 0.030
0
Silicon (Si), % 2.3 to 2.7
0.6 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.015
Tin (Sn), % 0 to 0.020
0
Titanium (Ti), % 0
0.4 to 1.0
Vanadium (V), % 0 to 0.1
0