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Ductile Cast Iron vs. EN 1.8201 Steel

Both ductile cast iron and EN 1.8201 steel are iron alloys. They have a moderately high 95% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is ductile cast iron and the bottom bar is EN 1.8201 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 310
190
Elastic (Young's, Tensile) Modulus, GPa 170 to 180
190
Elongation at Break, % 2.1 to 20
20
Poisson's Ratio 0.28 to 0.31
0.29
Shear Modulus, GPa 64 to 70
74
Shear Strength, MPa 420 to 800
390
Tensile Strength: Ultimate (UTS), MPa 460 to 920
630
Tensile Strength: Yield (Proof), MPa 310 to 670
450

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 290
450
Melting Completion (Liquidus), °C 1160
1500
Melting Onset (Solidus), °C 1120
1450
Specific Heat Capacity, J/kg-K 490
470
Thermal Conductivity, W/m-K 31 to 36
40
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
7.8
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8 to 9.4
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
7.0
Density, g/cm3 7.1 to 7.5
8.0
Embodied Carbon, kg CO2/kg material 1.5
2.5
Embodied Energy, MJ/kg 21
36
Embodied Water, L/kg 43
59

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 17 to 80
110
Resilience: Unit (Modulus of Resilience), kJ/m3 280 to 1330
530
Stiffness to Weight: Axial, points 12 to 14
13
Stiffness to Weight: Bending, points 24 to 26
24
Strength to Weight: Axial, points 17 to 35
22
Strength to Weight: Bending, points 18 to 29
20
Thermal Diffusivity, mm2/s 8.9 to 10
11
Thermal Shock Resistance, points 17 to 35
18

Alloy Composition

Aluminum (Al), % 0
0 to 0.030
Boron (B), % 0
0.0010 to 0.0060
Carbon (C), % 3.0 to 3.5
0.040 to 0.1
Chromium (Cr), % 0
1.9 to 2.6
Iron (Fe), % 93.7 to 95.5
93.6 to 96.2
Manganese (Mn), % 0
0.1 to 0.6
Molybdenum (Mo), % 0
0.050 to 0.3
Niobium (Nb), % 0
0.020 to 0.080
Nitrogen (N), % 0
0 to 0.015
Phosphorus (P), % 0 to 0.080
0 to 0.030
Silicon (Si), % 1.5 to 2.8
0 to 0.5
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 0
0.0050 to 0.060
Tungsten (W), % 0
1.5 to 1.8
Vanadium (V), % 0
0.2 to 0.3