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Grey Cast Iron vs. ACI-ASTM CT15C Steel

Both grey cast iron and ACI-ASTM CT15C steel are iron alloys. They have 46% of their average alloy composition in common. There are 29 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 grey cast iron and the bottom bar is ACI-ASTM CT15C steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 300
140
Elastic (Young's, Tensile) Modulus, GPa 180
200
Elongation at Break, % 9.6
23
Fatigue Strength, MPa 69 to 170
130
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 69
76
Tensile Strength: Ultimate (UTS), MPa 160 to 450
500
Tensile Strength: Yield (Proof), MPa 98 to 290
190

Thermal Properties

Latent Heat of Fusion, J/g 280
310
Melting Completion (Liquidus), °C 1380
1410
Melting Onset (Solidus), °C 1180
1360
Specific Heat Capacity, J/kg-K 490
470
Thermal Conductivity, W/m-K 46
12
Thermal Expansion, µm/m-K 11
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.9
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
36
Density, g/cm3 7.5
8.0
Embodied Carbon, kg CO2/kg material 1.5
6.1
Embodied Energy, MJ/kg 21
88
Embodied Water, L/kg 44
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 13 to 37
90
Resilience: Unit (Modulus of Resilience), kJ/m3 27 to 240
93
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 5.8 to 17
17
Strength to Weight: Bending, points 8.7 to 17
17
Thermal Diffusivity, mm2/s 13
3.2
Thermal Shock Resistance, points 6.0 to 17
12

Alloy Composition

Carbon (C), % 3.1 to 3.4
0.050 to 0.15
Chromium (Cr), % 0
19 to 21
Iron (Fe), % 92.1 to 93.9
40.3 to 49.2
Manganese (Mn), % 0.5 to 0.7
0.15 to 1.5
Nickel (Ni), % 0
31 to 34
Niobium (Nb), % 0
0.5 to 1.5
Phosphorus (P), % 0 to 0.9
0 to 0.030
Silicon (Si), % 2.5 to 2.8
0.15 to 1.5
Sulfur (S), % 0 to 0.15
0 to 0.030