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Austempered Cast Iron vs. EN 1.4618 Stainless Steel

Both austempered cast iron and EN 1.4618 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 EN 1.4618 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 270 to 490
200 to 210
Elastic (Young's, Tensile) Modulus, GPa 180
200
Elongation at Break, % 1.1 to 13
51
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 62 to 69
77
Tensile Strength: Ultimate (UTS), MPa 860 to 1800
680 to 700
Tensile Strength: Yield (Proof), MPa 560 to 1460
250 to 260

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Melting Completion (Liquidus), °C 1380
1400
Melting Onset (Solidus), °C 1340
1360
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
13
Density, g/cm3 7.5
7.7
Embodied Carbon, kg CO2/kg material 1.8
2.7
Embodied Energy, MJ/kg 25
39
Embodied Water, L/kg 48
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19 to 95
270 to 280
Resilience: Unit (Modulus of Resilience), kJ/m3 880 to 3970
160 to 170
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 32 to 66
24 to 25
Strength to Weight: Bending, points 27 to 44
22 to 23
Thermal Diffusivity, mm2/s 11
4.0
Thermal Shock Resistance, points 25 to 53
15 to 16

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 0.1
Chromium (Cr), % 0 to 0.1
16.5 to 18.5
Copper (Cu), % 0 to 0.8
1.0 to 2.5
Iron (Fe), % 89.6 to 94
62.7 to 72.5
Magnesium (Mg), % 0 to 0.040
0
Manganese (Mn), % 0.3 to 0.4
5.5 to 9.5
Molybdenum (Mo), % 0 to 0.3
0
Nickel (Ni), % 0 to 2.0
4.5 to 5.5
Nitrogen (N), % 0
0 to 0.15
Phosphorus (P), % 0 to 0.040
0 to 0.070
Selenium (Se), % 0 to 0.030
0
Silicon (Si), % 2.3 to 2.7
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.010
Tin (Sn), % 0 to 0.020
0
Vanadium (V), % 0 to 0.1
0