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ACI-ASTM CA6N Steel vs. Grey Cast Iron

Both ACI-ASTM CA6N steel and grey cast iron are iron alloys. They have 82% 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 grey cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
180
Elongation at Break, % 17
9.6
Fatigue Strength, MPa 640
69 to 170
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
69
Tensile Strength: Ultimate (UTS), MPa 1080
160 to 450
Tensile Strength: Yield (Proof), MPa 1060
98 to 290

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Melting Completion (Liquidus), °C 1440
1380
Melting Onset (Solidus), °C 1400
1180
Specific Heat Capacity, J/kg-K 480
490
Thermal Conductivity, W/m-K 23
46
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
8.9

Otherwise Unclassified Properties

Base Metal Price, % relative 11
1.9
Density, g/cm3 7.8
7.5
Embodied Carbon, kg CO2/kg material 2.5
1.5
Embodied Energy, MJ/kg 35
21
Embodied Water, L/kg 110
44

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
13 to 37
Resilience: Unit (Modulus of Resilience), kJ/m3 2900
27 to 240
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 38
5.8 to 17
Strength to Weight: Bending, points 30
8.7 to 17
Thermal Diffusivity, mm2/s 6.1
13
Thermal Shock Resistance, points 40
6.0 to 17

Alloy Composition

Carbon (C), % 0 to 0.060
3.1 to 3.4
Chromium (Cr), % 10.5 to 12.5
0
Iron (Fe), % 77.9 to 83.5
92.1 to 93.9
Manganese (Mn), % 0 to 0.5
0.5 to 0.7
Nickel (Ni), % 6.0 to 8.0
0
Phosphorus (P), % 0 to 0.020
0 to 0.9
Silicon (Si), % 0 to 1.0
2.5 to 2.8
Sulfur (S), % 0 to 0.020
0 to 0.15