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Ductile Cast Iron vs. EN 1.4474 Stainless Steel

Both ductile cast iron and EN 1.4474 stainless steel are iron alloys. They have 66% of their average alloy composition in common. There are 28 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 ductile cast iron and the bottom bar is EN 1.4474 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 170 to 180
200
Elongation at Break, % 2.1 to 20
23
Poisson's Ratio 0.28 to 0.31
0.27
Shear Modulus, GPa 64 to 70
80
Tensile Strength: Ultimate (UTS), MPa 460 to 920
670
Tensile Strength: Yield (Proof), MPa 310 to 670
480

Thermal Properties

Latent Heat of Fusion, J/g 270
300
Maximum Temperature: Mechanical, °C 290
1100
Melting Completion (Liquidus), °C 1160
1430
Melting Onset (Solidus), °C 1120
1390
Specific Heat Capacity, J/kg-K 490
480
Thermal Conductivity, W/m-K 31 to 36
17
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8 to 9.4
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
17
Density, g/cm3 7.1 to 7.5
7.7
Embodied Carbon, kg CO2/kg material 1.5
3.4
Embodied Energy, MJ/kg 21
48
Embodied Water, L/kg 43
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 17 to 80
140
Resilience: Unit (Modulus of Resilience), kJ/m3 280 to 1330
560
Stiffness to Weight: Axial, points 12 to 14
15
Stiffness to Weight: Bending, points 24 to 26
25
Strength to Weight: Axial, points 17 to 35
24
Strength to Weight: Bending, points 18 to 29
22
Thermal Diffusivity, mm2/s 8.9 to 10
4.6
Thermal Shock Resistance, points 17 to 35
18

Alloy Composition

Carbon (C), % 3.0 to 3.5
0 to 0.050
Chromium (Cr), % 0
25 to 27
Iron (Fe), % 93.7 to 95.5
61.2 to 69.1
Manganese (Mn), % 0
0 to 2.0
Molybdenum (Mo), % 0
1.3 to 2.0
Nickel (Ni), % 0
4.5 to 6.5
Nitrogen (N), % 0
0.12 to 0.2
Phosphorus (P), % 0 to 0.080
0 to 0.035
Silicon (Si), % 1.5 to 2.8
0 to 1.0
Sulfur (S), % 0
0 to 0.025