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Austempered Cast Iron vs. EN 1.4959 Stainless Steel

Both austempered cast iron and EN 1.4959 stainless steel are iron alloys. They have 47% of their average alloy composition in common. 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 austempered cast iron and the bottom bar is EN 1.4959 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180
200
Elongation at Break, % 1.1 to 13
40
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 62 to 69
77
Tensile Strength: Ultimate (UTS), MPa 860 to 1800
630
Tensile Strength: Yield (Proof), MPa 560 to 1460
190

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Melting Completion (Liquidus), °C 1380
1400
Melting Onset (Solidus), °C 1340
1350
Specific Heat Capacity, J/kg-K 490
480
Thermal Conductivity, W/m-K 42
12
Thermal Expansion, µm/m-K 13
15

Otherwise Unclassified Properties

Base Metal Price, % relative 2.9
31
Density, g/cm3 7.5
8.0
Embodied Carbon, kg CO2/kg material 1.8
5.4
Embodied Energy, MJ/kg 25
76
Embodied Water, L/kg 48
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19 to 95
190
Resilience: Unit (Modulus of Resilience), kJ/m3 880 to 3970
96
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 32 to 66
22
Strength to Weight: Bending, points 27 to 44
20
Thermal Diffusivity, mm2/s 11
3.2
Thermal Shock Resistance, points 25 to 53
15

Alloy Composition

Aluminum (Al), % 0 to 0.050
0.25 to 0.65
Arsenic (As), % 0 to 0.020
0
Carbon (C), % 3.4 to 3.8
0.050 to 0.1
Chromium (Cr), % 0 to 0.1
19 to 22
Cobalt (Co), % 0
0 to 0.5
Copper (Cu), % 0 to 0.8
0 to 0.5
Iron (Fe), % 89.6 to 94
39.4 to 50.5
Magnesium (Mg), % 0 to 0.040
0
Manganese (Mn), % 0.3 to 0.4
0 to 1.5
Molybdenum (Mo), % 0 to 0.3
0
Nickel (Ni), % 0 to 2.0
30 to 34
Nitrogen (N), % 0
0 to 0.030
Phosphorus (P), % 0 to 0.040
0 to 0.015
Selenium (Se), % 0 to 0.030
0
Silicon (Si), % 2.3 to 2.7
0 to 0.7
Sulfur (S), % 0 to 0.020
0 to 0.010
Tin (Sn), % 0 to 0.020
0
Titanium (Ti), % 0
0.25 to 0.65
Vanadium (V), % 0 to 0.1
0