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ACI-ASTM CA40 Steel vs. Grey Cast Iron

Both ACI-ASTM CA40 steel and grey cast iron are iron alloys. They have 86% 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 ACI-ASTM CA40 steel and the bottom bar is grey cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 310
160 to 300
Elastic (Young's, Tensile) Modulus, GPa 190
180
Elongation at Break, % 10
9.6
Fatigue Strength, MPa 460
69 to 170
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
69
Tensile Strength: Ultimate (UTS), MPa 910
160 to 450
Tensile Strength: Yield (Proof), MPa 860
98 to 290

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Melting Completion (Liquidus), °C 1440
1380
Melting Onset (Solidus), °C 1500
1180
Specific Heat Capacity, J/kg-K 480
490
Thermal Conductivity, W/m-K 25
46
Thermal Expansion, µm/m-K 10
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.0
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 3.5
8.9

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
1.9
Density, g/cm3 7.7
7.5
Embodied Carbon, kg CO2/kg material 2.0
1.5
Embodied Energy, MJ/kg 28
21
Embodied Water, L/kg 100
44

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 89
13 to 37
Resilience: Unit (Modulus of Resilience), kJ/m3 1910
27 to 240
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 33
5.8 to 17
Strength to Weight: Bending, points 27
8.7 to 17
Thermal Diffusivity, mm2/s 6.7
13
Thermal Shock Resistance, points 33
6.0 to 17

Alloy Composition

Carbon (C), % 0.2 to 0.4
3.1 to 3.4
Chromium (Cr), % 11.5 to 14
0
Iron (Fe), % 81.5 to 88.3
92.1 to 93.9
Manganese (Mn), % 0 to 1.0
0.5 to 0.7
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 0 to 1.0
0
Phosphorus (P), % 0 to 0.040
0 to 0.9
Silicon (Si), % 0 to 1.5
2.5 to 2.8
Sulfur (S), % 0 to 0.040
0 to 0.15