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ACI-ASTM CA6N Steel vs. Ductile Cast Iron

Both ACI-ASTM CA6N steel and ductile cast iron are iron alloys. They have 81% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CA6N 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
Elongation at Break, % 17
2.1 to 20
Poisson's Ratio 0.28
0.28 to 0.31
Shear Modulus, GPa 75
64 to 70
Tensile Strength: Ultimate (UTS), MPa 1080
460 to 920
Tensile Strength: Yield (Proof), MPa 1060
310 to 670

Thermal Properties

Latent Heat of Fusion, J/g 280
270
Maximum Temperature: Mechanical, °C 740
290
Melting Completion (Liquidus), °C 1440
1160
Melting Onset (Solidus), °C 1400
1120
Specific Heat Capacity, J/kg-K 480
490
Thermal Conductivity, W/m-K 23
31 to 36
Thermal Expansion, µm/m-K 9.9
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.6
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
8.8 to 9.4

Otherwise Unclassified Properties

Base Metal Price, % relative 11
1.9
Density, g/cm3 7.8
7.1 to 7.5
Embodied Carbon, kg CO2/kg material 2.5
1.5
Embodied Energy, MJ/kg 35
21
Embodied Water, L/kg 110
43

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
17 to 80
Resilience: Unit (Modulus of Resilience), kJ/m3 2900
280 to 1330
Stiffness to Weight: Axial, points 14
12 to 14
Stiffness to Weight: Bending, points 25
24 to 26
Strength to Weight: Axial, points 38
17 to 35
Strength to Weight: Bending, points 30
18 to 29
Thermal Diffusivity, mm2/s 6.1
8.9 to 10
Thermal Shock Resistance, points 40
17 to 35

Alloy Composition

Carbon (C), % 0 to 0.060
3.0 to 3.5
Chromium (Cr), % 10.5 to 12.5
0
Iron (Fe), % 77.9 to 83.5
93.7 to 95.5
Manganese (Mn), % 0 to 0.5
0
Nickel (Ni), % 6.0 to 8.0
0
Phosphorus (P), % 0 to 0.020
0 to 0.080
Silicon (Si), % 0 to 1.0
1.5 to 2.8
Sulfur (S), % 0 to 0.020
0