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Austempered Cast Iron vs. AWS ERTi-7

Austempered cast iron belongs to the iron alloys classification, while AWS ERTi-7 belongs to the titanium alloys. There are 24 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 AWS ERTi-7.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180
110
Elongation at Break, % 1.1 to 13
20
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 62 to 69
40
Tensile Strength: Ultimate (UTS), MPa 860 to 1800
340
Tensile Strength: Yield (Proof), MPa 560 to 1460
280

Thermal Properties

Latent Heat of Fusion, J/g 280
420
Melting Completion (Liquidus), °C 1380
1670
Melting Onset (Solidus), °C 1340
1620
Specific Heat Capacity, J/kg-K 490
540
Thermal Conductivity, W/m-K 42
21
Thermal Expansion, µm/m-K 13
8.7

Otherwise Unclassified Properties

Density, g/cm3 7.5
4.5
Embodied Carbon, kg CO2/kg material 1.8
47
Embodied Energy, MJ/kg 25
800
Embodied Water, L/kg 48
470

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19 to 95
64
Resilience: Unit (Modulus of Resilience), kJ/m3 880 to 3970
360
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 32 to 66
21
Strength to Weight: Bending, points 27 to 44
24
Thermal Diffusivity, mm2/s 11
8.8
Thermal Shock Resistance, points 25 to 53
26

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 0.030
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 0 to 0.8
0
Hydrogen (H), % 0
0 to 0.0080
Iron (Fe), % 89.6 to 94
0 to 0.12
Magnesium (Mg), % 0 to 0.040
0
Manganese (Mn), % 0.3 to 0.4
0
Molybdenum (Mo), % 0 to 0.3
0
Nickel (Ni), % 0 to 2.0
0
Nitrogen (N), % 0
0 to 0.015
Oxygen (O), % 0
0.080 to 0.16
Palladium (Pd), % 0
0.12 to 0.25
Phosphorus (P), % 0 to 0.040
0
Selenium (Se), % 0 to 0.030
0
Silicon (Si), % 2.3 to 2.7
0
Sulfur (S), % 0 to 0.020
0
Tin (Sn), % 0 to 0.020
0
Titanium (Ti), % 0
99.417 to 99.8
Vanadium (V), % 0 to 0.1
0