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Ductile Cast Iron vs. EN 1.4029 Stainless Steel

Both ductile cast iron and EN 1.4029 stainless steel are iron alloys. They have 86% of their average alloy composition in common. There are 29 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 1.4029 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 170 to 180
190
Elongation at Break, % 2.1 to 20
10 to 20
Poisson's Ratio 0.28 to 0.31
0.28
Shear Modulus, GPa 64 to 70
76
Shear Strength, MPa 420 to 800
440 to 550
Tensile Strength: Ultimate (UTS), MPa 460 to 920
700 to 930
Tensile Strength: Yield (Proof), MPa 310 to 670
410 to 740

Thermal Properties

Latent Heat of Fusion, J/g 270
270
Maximum Temperature: Mechanical, °C 290
750
Melting Completion (Liquidus), °C 1160
1440
Melting Onset (Solidus), °C 1120
1400
Specific Heat Capacity, J/kg-K 490
480
Thermal Conductivity, W/m-K 31 to 36
30
Thermal Expansion, µm/m-K 11
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
3.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8 to 9.4
3.7

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
7.0
Density, g/cm3 7.1 to 7.5
7.7
Embodied Carbon, kg CO2/kg material 1.5
2.0
Embodied Energy, MJ/kg 21
28
Embodied Water, L/kg 43
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 17 to 80
89 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 280 to 1330
440 to 1410
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
25 to 33
Strength to Weight: Bending, points 18 to 29
23 to 27
Thermal Diffusivity, mm2/s 8.9 to 10
8.1
Thermal Shock Resistance, points 17 to 35
26 to 34

Alloy Composition

Carbon (C), % 3.0 to 3.5
0.25 to 0.32
Chromium (Cr), % 0
12 to 13.5
Iron (Fe), % 93.7 to 95.5
82.8 to 87.6
Manganese (Mn), % 0
0 to 1.5
Molybdenum (Mo), % 0
0 to 0.6
Phosphorus (P), % 0 to 0.080
0 to 0.040
Silicon (Si), % 1.5 to 2.8
0 to 1.0
Sulfur (S), % 0
0.15 to 0.25