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ACI-ASTM CD4MCu Steel vs. Automotive Malleable Cast Iron

Both ACI-ASTM CD4MCu steel and automotive malleable cast iron are iron alloys. They have 64% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CD4MCu steel and the bottom bar is automotive malleable cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
180
Elongation at Break, % 18
1.0 to 10
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 79
70
Tensile Strength: Ultimate (UTS), MPa 770
350 to 720
Tensile Strength: Yield (Proof), MPa 550
220 to 590

Thermal Properties

Latent Heat of Fusion, J/g 300
260
Melting Completion (Liquidus), °C 1430
1410
Melting Onset (Solidus), °C 1380
1370
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 17
41
Thermal Expansion, µm/m-K 13
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 18
1.9
Density, g/cm3 7.8
7.6
Embodied Carbon, kg CO2/kg material 3.5
1.5
Embodied Energy, MJ/kg 49
20
Embodied Water, L/kg 180
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
6.8 to 30
Resilience: Unit (Modulus of Resilience), kJ/m3 760
130 to 950
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 28
13 to 26
Strength to Weight: Bending, points 24
14 to 24
Thermal Diffusivity, mm2/s 4.5
11
Thermal Shock Resistance, points 21
9.9 to 21

Alloy Composition

Carbon (C), % 0 to 0.040
2.2 to 2.9
Chromium (Cr), % 24.5 to 26.5
0
Copper (Cu), % 2.8 to 3.3
0
Iron (Fe), % 59.9 to 66.3
93.6 to 96.7
Manganese (Mn), % 0 to 1.0
0.15 to 1.3
Molybdenum (Mo), % 1.8 to 2.3
0
Nickel (Ni), % 4.8 to 6.0
0
Phosphorus (P), % 0 to 0.040
0.020 to 0.15
Silicon (Si), % 0 to 1.0
0.9 to 1.9
Sulfur (S), % 0 to 0.040
0.020 to 0.2