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EN 1.7709 Steel vs. Grey Cast Iron

Both EN 1.7709 steel and grey cast iron are iron alloys. They have a moderately high 94% of their average alloy composition in common. There are 24 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 EN 1.7709 steel and the bottom bar is grey cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 230
160 to 300
Elastic (Young's, Tensile) Modulus, GPa 190
180
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
69
Tensile Strength: Ultimate (UTS), MPa 650 to 780
160 to 450

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Melting Completion (Liquidus), °C 1470
1380
Melting Onset (Solidus), °C 1420
1180
Specific Heat Capacity, J/kg-K 470
490
Thermal Conductivity, W/m-K 33
46
Thermal Expansion, µm/m-K 11
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.5
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
8.9

Otherwise Unclassified Properties

Base Metal Price, % relative 3.4
1.9
Density, g/cm3 7.8
7.5
Embodied Carbon, kg CO2/kg material 2.3
1.5
Embodied Energy, MJ/kg 32
21
Embodied Water, L/kg 56
44

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 23 to 27
5.8 to 17
Strength to Weight: Bending, points 21 to 24
8.7 to 17
Thermal Diffusivity, mm2/s 8.9
13
Thermal Shock Resistance, points 22 to 26
6.0 to 17

Alloy Composition

Aluminum (Al), % 0 to 0.030
0
Carbon (C), % 0.17 to 0.25
3.1 to 3.4
Chromium (Cr), % 1.2 to 1.5
0
Iron (Fe), % 95.2 to 97.5
92.1 to 93.9
Manganese (Mn), % 0.4 to 0.8
0.5 to 0.7
Molybdenum (Mo), % 0.55 to 0.8
0
Nickel (Ni), % 0 to 0.6
0
Phosphorus (P), % 0 to 0.025
0 to 0.9
Silicon (Si), % 0 to 0.4
2.5 to 2.8
Sulfur (S), % 0 to 0.030
0 to 0.15
Vanadium (V), % 0.2 to 0.35
0