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SAE-AISI S4 Steel vs. Grey Cast Iron

Both SAE-AISI S4 steel and grey cast iron are iron alloys. They have a very high 96% 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 grey cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
180
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
69
Tensile Strength: Ultimate (UTS), MPa 670 to 2140
160 to 450

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Melting Completion (Liquidus), °C 1430
1380
Melting Onset (Solidus), °C 1390
1180
Specific Heat Capacity, J/kg-K 480
490
Thermal Conductivity, W/m-K 44
46
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
8.9

Otherwise Unclassified Properties

Base Metal Price, % relative 2.2
1.9
Density, g/cm3 7.7
7.5
Embodied Carbon, kg CO2/kg material 2.0
1.5
Embodied Energy, MJ/kg 29
21
Embodied Water, L/kg 48
44

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24 to 77
5.8 to 17
Strength to Weight: Bending, points 22 to 48
8.7 to 17
Thermal Diffusivity, mm2/s 12
13
Thermal Shock Resistance, points 20 to 65
6.0 to 17

Alloy Composition

Carbon (C), % 0.5 to 0.65
3.1 to 3.4
Chromium (Cr), % 0.1 to 0.5
0
Iron (Fe), % 95.2 to 96.9
92.1 to 93.9
Manganese (Mn), % 0.6 to 1.0
0.5 to 0.7
Phosphorus (P), % 0 to 0.030
0 to 0.9
Silicon (Si), % 1.8 to 2.3
2.5 to 2.8
Sulfur (S), % 0 to 0.030
0 to 0.15
Vanadium (V), % 0.15 to 0.35
0