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SAE-AISI S4 Steel vs. Ductile Cast Iron

Both SAE-AISI S4 steel and ductile cast iron are iron alloys. They have a very high 97% of their average alloy composition in common. There are 23 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 SAE-AISI S4 steel and the bottom bar is ductile cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
170 to 180
Poisson's Ratio 0.29
0.28 to 0.31
Shear Modulus, GPa 72
64 to 70
Tensile Strength: Ultimate (UTS), MPa 670 to 2140
460 to 920

Thermal Properties

Latent Heat of Fusion, J/g 280
270
Melting Completion (Liquidus), °C 1430
1160
Melting Onset (Solidus), °C 1390
1120
Specific Heat Capacity, J/kg-K 480
490
Thermal Conductivity, W/m-K 44
31 to 36
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.7
8.8 to 9.4

Otherwise Unclassified Properties

Base Metal Price, % relative 2.2
1.9
Density, g/cm3 7.7
7.1 to 7.5
Embodied Carbon, kg CO2/kg material 2.0
1.5
Embodied Energy, MJ/kg 29
21
Embodied Water, L/kg 48
43

Common Calculations

Stiffness to Weight: Axial, points 13
12 to 14
Stiffness to Weight: Bending, points 25
24 to 26
Strength to Weight: Axial, points 24 to 77
17 to 35
Strength to Weight: Bending, points 22 to 48
18 to 29
Thermal Diffusivity, mm2/s 12
8.9 to 10
Thermal Shock Resistance, points 20 to 65
17 to 35

Alloy Composition

Carbon (C), % 0.5 to 0.65
3.0 to 3.5
Chromium (Cr), % 0.1 to 0.5
0
Iron (Fe), % 95.2 to 96.9
93.7 to 95.5
Manganese (Mn), % 0.6 to 1.0
0
Phosphorus (P), % 0 to 0.030
0 to 0.080
Silicon (Si), % 1.8 to 2.3
1.5 to 2.8
Sulfur (S), % 0 to 0.030
0
Vanadium (V), % 0.15 to 0.35
0

Comparable Variants