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ACI-ASTM CN7MS Steel vs. Grey Cast Iron

Both ACI-ASTM CN7MS steel and grey cast iron are iron alloys. They have 53% of their average alloy composition in common. There are 27 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 CN7MS steel and the bottom bar is grey cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
160 to 300
Elastic (Young's, Tensile) Modulus, GPa 200
180
Elongation at Break, % 39
9.6
Fatigue Strength, MPa 200
69 to 170
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
69
Tensile Strength: Ultimate (UTS), MPa 540
160 to 450
Tensile Strength: Yield (Proof), MPa 230
98 to 290

Thermal Properties

Latent Heat of Fusion, J/g 340
280
Melting Completion (Liquidus), °C 1400
1380
Melting Onset (Solidus), °C 1350
1180
Specific Heat Capacity, J/kg-K 480
490
Thermal Conductivity, W/m-K 12
46
Thermal Expansion, µm/m-K 16
11

Otherwise Unclassified Properties

Base Metal Price, % relative 28
1.9
Density, g/cm3 7.9
7.5
Embodied Carbon, kg CO2/kg material 5.1
1.5
Embodied Energy, MJ/kg 71
21
Embodied Water, L/kg 180
44

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
13 to 37
Resilience: Unit (Modulus of Resilience), kJ/m3 140
27 to 240
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 19
5.8 to 17
Strength to Weight: Bending, points 19
8.7 to 17
Thermal Diffusivity, mm2/s 3.2
13
Thermal Shock Resistance, points 13
6.0 to 17

Alloy Composition

Carbon (C), % 0 to 0.070
3.1 to 3.4
Chromium (Cr), % 18 to 20
0
Copper (Cu), % 1.5 to 2.0
0
Iron (Fe), % 45.4 to 53.5
92.1 to 93.9
Manganese (Mn), % 0 to 1.0
0.5 to 0.7
Molybdenum (Mo), % 2.5 to 3.0
0
Nickel (Ni), % 22 to 25
0
Phosphorus (P), % 0 to 0.040
0 to 0.9
Silicon (Si), % 2.5 to 3.5
2.5 to 2.8
Sulfur (S), % 0 to 0.030
0 to 0.15