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Ductile Cast Iron vs. EN 1.4578 Stainless Steel

Both ductile cast iron and EN 1.4578 stainless steel are iron alloys. They have 66% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is ductile cast iron and the bottom bar is EN 1.4578 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 310
190
Elastic (Young's, Tensile) Modulus, GPa 170 to 180
200
Elongation at Break, % 2.1 to 20
51
Poisson's Ratio 0.28 to 0.31
0.28
Shear Modulus, GPa 64 to 70
77
Shear Strength, MPa 420 to 800
400
Tensile Strength: Ultimate (UTS), MPa 460 to 920
550
Tensile Strength: Yield (Proof), MPa 310 to 670
200

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Maximum Temperature: Mechanical, °C 290
930
Melting Completion (Liquidus), °C 1160
1430
Melting Onset (Solidus), °C 1120
1390
Specific Heat Capacity, J/kg-K 490
470
Thermal Conductivity, W/m-K 31 to 36
14
Thermal Expansion, µm/m-K 11
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8 to 9.4
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
19
Density, g/cm3 7.1 to 7.5
7.9
Embodied Carbon, kg CO2/kg material 1.5
3.7
Embodied Energy, MJ/kg 21
51
Embodied Water, L/kg 43
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 17 to 80
220
Resilience: Unit (Modulus of Resilience), kJ/m3 280 to 1330
100
Stiffness to Weight: Axial, points 12 to 14
14
Stiffness to Weight: Bending, points 24 to 26
25
Strength to Weight: Axial, points 17 to 35
19
Strength to Weight: Bending, points 18 to 29
19
Thermal Diffusivity, mm2/s 8.9 to 10
3.9
Thermal Shock Resistance, points 17 to 35
12

Alloy Composition

Carbon (C), % 3.0 to 3.5
0 to 0.040
Chromium (Cr), % 0
16.5 to 17.5
Copper (Cu), % 0
3.0 to 3.5
Iron (Fe), % 93.7 to 95.5
62.3 to 68.5
Manganese (Mn), % 0
0 to 2.0
Molybdenum (Mo), % 0
2.0 to 2.5
Nickel (Ni), % 0
10 to 11
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0 to 0.080
0 to 0.045
Silicon (Si), % 1.5 to 2.8
0 to 1.0
Sulfur (S), % 0
0 to 0.015