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Automotive Malleable Cast Iron vs. SAE-AISI D7 Steel

Both automotive malleable cast iron and SAE-AISI D7 steel are iron alloys. They have 82% of their average alloy composition in common. There are 21 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 automotive malleable cast iron and the bottom bar is SAE-AISI D7 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180
190
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 70
73
Tensile Strength: Ultimate (UTS), MPa 350 to 720
800 to 2120

Thermal Properties

Latent Heat of Fusion, J/g 260
270
Melting Completion (Liquidus), °C 1410
1440
Melting Onset (Solidus), °C 1370
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 41
27
Thermal Expansion, µm/m-K 14
11

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
10
Density, g/cm3 7.6
7.6
Embodied Carbon, kg CO2/kg material 1.5
11
Embodied Energy, MJ/kg 20
180
Embodied Water, L/kg 45
130

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 13 to 26
29 to 78
Strength to Weight: Bending, points 14 to 24
25 to 48
Thermal Diffusivity, mm2/s 11
7.4
Thermal Shock Resistance, points 9.9 to 21
27 to 72

Alloy Composition

Carbon (C), % 2.2 to 2.9
2.2 to 2.5
Chromium (Cr), % 0
11.5 to 13.5
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 93.6 to 96.7
76.6 to 81.9
Manganese (Mn), % 0.15 to 1.3
0 to 0.6
Molybdenum (Mo), % 0
0.7 to 1.2
Nickel (Ni), % 0
0 to 0.3
Phosphorus (P), % 0.020 to 0.15
0 to 0.030
Silicon (Si), % 0.9 to 1.9
0 to 0.6
Sulfur (S), % 0.020 to 0.2
0 to 0.030
Vanadium (V), % 0
3.8 to 4.4

Comparable Variants