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AISI 204 Stainless Steel vs. Austempered Cast Iron

Both AISI 204 stainless steel and austempered cast iron are iron alloys. They have 75% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is AISI 204 stainless steel and the bottom bar is austempered cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 330
270 to 490
Elastic (Young's, Tensile) Modulus, GPa 200
180
Elongation at Break, % 23 to 39
1.1 to 13
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
62 to 69
Tensile Strength: Ultimate (UTS), MPa 730 to 1100
860 to 1800
Tensile Strength: Yield (Proof), MPa 380 to 1080
560 to 1460

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Melting Completion (Liquidus), °C 1410
1380
Melting Onset (Solidus), °C 1370
1340
Specific Heat Capacity, J/kg-K 480
490
Thermal Conductivity, W/m-K 15
42
Thermal Expansion, µm/m-K 17
13

Otherwise Unclassified Properties

Base Metal Price, % relative 10
2.9
Density, g/cm3 7.7
7.5
Embodied Carbon, kg CO2/kg material 2.4
1.8
Embodied Energy, MJ/kg 35
25
Embodied Water, L/kg 130
48

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 240 to 250
19 to 95
Resilience: Unit (Modulus of Resilience), kJ/m3 360 to 2940
880 to 3970
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 27 to 40
32 to 66
Strength to Weight: Bending, points 24 to 31
27 to 44
Thermal Diffusivity, mm2/s 4.1
11
Thermal Shock Resistance, points 16 to 24
25 to 53

Alloy Composition

Aluminum (Al), % 0
0 to 0.050
Arsenic (As), % 0
0 to 0.020
Carbon (C), % 0 to 0.030
3.4 to 3.8
Chromium (Cr), % 15 to 17
0 to 0.1
Copper (Cu), % 0
0 to 0.8
Iron (Fe), % 69.6 to 76.4
89.6 to 94
Magnesium (Mg), % 0
0 to 0.040
Manganese (Mn), % 7.0 to 9.0
0.3 to 0.4
Molybdenum (Mo), % 0
0 to 0.3
Nickel (Ni), % 1.5 to 3.0
0 to 2.0
Nitrogen (N), % 0.15 to 0.3
0
Phosphorus (P), % 0 to 0.040
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 0.030
0 to 0.020
Tin (Sn), % 0
0 to 0.020
Vanadium (V), % 0
0 to 0.1