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N08020 Stainless Steel vs. Austempered Cast Iron

Both N08020 stainless steel and austempered cast iron are iron alloys. They have a modest 39% of their average alloy composition in common, which, by itself, doesn't mean much. There are 25 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 N08020 stainless steel and the bottom bar is austempered cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
180
Elongation at Break, % 15 to 34
1.1 to 13
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
62 to 69
Tensile Strength: Ultimate (UTS), MPa 610 to 620
860 to 1800
Tensile Strength: Yield (Proof), MPa 270 to 420
560 to 1460

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Melting Completion (Liquidus), °C 1410
1380
Melting Onset (Solidus), °C 1360
1340
Specific Heat Capacity, J/kg-K 460
490
Thermal Conductivity, W/m-K 12
42
Thermal Expansion, µm/m-K 15
13

Otherwise Unclassified Properties

Base Metal Price, % relative 38
2.9
Density, g/cm3 8.2
7.5
Embodied Carbon, kg CO2/kg material 6.6
1.8
Embodied Energy, MJ/kg 92
25
Embodied Water, L/kg 220
48

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 83 to 170
19 to 95
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 440
880 to 3970
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 21
32 to 66
Strength to Weight: Bending, points 20
27 to 44
Thermal Diffusivity, mm2/s 3.2
11
Thermal Shock Resistance, points 15
25 to 53

Alloy Composition

Aluminum (Al), % 0
0 to 0.050
Arsenic (As), % 0
0 to 0.020
Carbon (C), % 0 to 0.070
3.4 to 3.8
Chromium (Cr), % 19 to 21
0 to 0.1
Copper (Cu), % 3.0 to 4.0
0 to 0.8
Iron (Fe), % 29.9 to 44
89.6 to 94
Magnesium (Mg), % 0
0 to 0.040
Manganese (Mn), % 0 to 2.0
0.3 to 0.4
Molybdenum (Mo), % 2.0 to 3.0
0 to 0.3
Nickel (Ni), % 32 to 38
0 to 2.0
Niobium (Nb), % 0 to 1.0
0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Selenium (Se), % 0
0 to 0.030
Silicon (Si), % 0 to 1.0
2.3 to 2.7
Sulfur (S), % 0 to 0.035
0 to 0.020
Tin (Sn), % 0
0 to 0.020
Vanadium (V), % 0
0 to 0.1