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Austempered Cast Iron vs. S20910 Stainless Steel

Both austempered cast iron and S20910 stainless steel are iron alloys. They have 59% of their average alloy composition in common. There are 26 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 S20910 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 270 to 490
230 to 290
Elastic (Young's, Tensile) Modulus, GPa 180
200
Elongation at Break, % 1.1 to 13
14 to 39
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 62 to 69
79
Tensile Strength: Ultimate (UTS), MPa 860 to 1800
780 to 940
Tensile Strength: Yield (Proof), MPa 560 to 1460
430 to 810

Thermal Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 2.9
22
Density, g/cm3 7.5
7.8
Embodied Carbon, kg CO2/kg material 1.8
4.8
Embodied Energy, MJ/kg 25
68
Embodied Water, L/kg 48
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19 to 95
120 to 260
Resilience: Unit (Modulus of Resilience), kJ/m3 880 to 3970
460 to 1640
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 32 to 66
28 to 33
Strength to Weight: Bending, points 27 to 44
24 to 27
Thermal Diffusivity, mm2/s 11
3.6
Thermal Shock Resistance, points 25 to 53
17 to 21

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 0.060
Chromium (Cr), % 0 to 0.1
20.5 to 23.5
Copper (Cu), % 0 to 0.8
0
Iron (Fe), % 89.6 to 94
52.1 to 62.1
Magnesium (Mg), % 0 to 0.040
0
Manganese (Mn), % 0.3 to 0.4
4.0 to 6.0
Molybdenum (Mo), % 0 to 0.3
1.5 to 3.0
Nickel (Ni), % 0 to 2.0
11.5 to 13.5
Niobium (Nb), % 0
0.1 to 0.3
Nitrogen (N), % 0
0.2 to 0.4
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 0.75
Sulfur (S), % 0 to 0.020
0 to 0.030
Tin (Sn), % 0 to 0.020
0
Vanadium (V), % 0 to 0.1
0.1 to 0.3