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Grey Cast Iron vs. ACI-ASTM CG6MMN Steel

Both grey cast iron and ACI-ASTM CG6MMN steel are iron alloys. They have 58% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (9, 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 CG6MMN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 300
190
Elastic (Young's, Tensile) Modulus, GPa 180
200
Elongation at Break, % 9.6
34
Fatigue Strength, MPa 69 to 170
260
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 69
79
Tensile Strength: Ultimate (UTS), MPa 160 to 450
670
Tensile Strength: Yield (Proof), MPa 98 to 290
320

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Melting Completion (Liquidus), °C 1380
1420
Melting Onset (Solidus), °C 1180
1380
Specific Heat Capacity, J/kg-K 490
480
Thermal Expansion, µm/m-K 11
17

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
22
Density, g/cm3 7.5
7.8
Embodied Carbon, kg CO2/kg material 1.5
4.8
Embodied Energy, MJ/kg 21
68
Embodied Water, L/kg 44
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 13 to 37
190
Resilience: Unit (Modulus of Resilience), kJ/m3 27 to 240
260
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 5.8 to 17
24
Strength to Weight: Bending, points 8.7 to 17
22
Thermal Shock Resistance, points 6.0 to 17
14

Alloy Composition

Carbon (C), % 3.1 to 3.4
0 to 0.060
Chromium (Cr), % 0
20.5 to 23.5
Iron (Fe), % 92.1 to 93.9
51.9 to 62.1
Manganese (Mn), % 0.5 to 0.7
4.0 to 6.0
Molybdenum (Mo), % 0
1.5 to 3.0
Nickel (Ni), % 0
11.5 to 13.5
Niobium (Nb), % 0
0.1 to 0.3
Nitrogen (N), % 0
0.2 to 0.4
Phosphorus (P), % 0 to 0.9
0 to 0.040
Silicon (Si), % 2.5 to 2.8
0 to 1.0
Sulfur (S), % 0 to 0.15
0 to 0.030
Vanadium (V), % 0
0.1 to 0.3