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Automotive Malleable Cast Iron vs. ACI-ASTM CT15C Steel

Both automotive malleable cast iron and ACI-ASTM CT15C steel are iron alloys. They have 46% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is automotive malleable cast iron and the bottom bar is ACI-ASTM CT15C steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 130 to 290
140
Elastic (Young's, Tensile) Modulus, GPa 180
200
Elongation at Break, % 1.0 to 10
23
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 70
76
Tensile Strength: Ultimate (UTS), MPa 350 to 720
500
Tensile Strength: Yield (Proof), MPa 220 to 590
190

Thermal Properties

Latent Heat of Fusion, J/g 260
310
Melting Completion (Liquidus), °C 1410
1410
Melting Onset (Solidus), °C 1370
1360
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 41
12
Thermal Expansion, µm/m-K 14
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.7
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
36
Density, g/cm3 7.6
8.0
Embodied Carbon, kg CO2/kg material 1.5
6.1
Embodied Energy, MJ/kg 20
88
Embodied Water, L/kg 45
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 6.8 to 30
90
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 950
93
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 13 to 26
17
Strength to Weight: Bending, points 14 to 24
17
Thermal Diffusivity, mm2/s 11
3.2
Thermal Shock Resistance, points 9.9 to 21
12

Alloy Composition

Carbon (C), % 2.2 to 2.9
0.050 to 0.15
Chromium (Cr), % 0
19 to 21
Iron (Fe), % 93.6 to 96.7
40.3 to 49.2
Manganese (Mn), % 0.15 to 1.3
0.15 to 1.5
Nickel (Ni), % 0
31 to 34
Niobium (Nb), % 0
0.5 to 1.5
Phosphorus (P), % 0.020 to 0.15
0 to 0.030
Silicon (Si), % 0.9 to 1.9
0.15 to 1.5
Sulfur (S), % 0.020 to 0.2
0 to 0.030