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Ductile Cast Iron vs. S41050 Stainless Steel

Both ductile cast iron and S41050 stainless steel are iron alloys. They have 87% 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 S41050 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 310
160
Elastic (Young's, Tensile) Modulus, GPa 170 to 180
190
Elongation at Break, % 2.1 to 20
25
Poisson's Ratio 0.28 to 0.31
0.28
Shear Modulus, GPa 64 to 70
76
Shear Strength, MPa 420 to 800
300
Tensile Strength: Ultimate (UTS), MPa 460 to 920
470
Tensile Strength: Yield (Proof), MPa 310 to 670
230

Thermal Properties

Latent Heat of Fusion, J/g 270
270
Maximum Temperature: Mechanical, °C 290
720
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
27
Thermal Expansion, µm/m-K 11
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8 to 9.4
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
7.0
Density, g/cm3 7.1 to 7.5
7.8
Embodied Carbon, kg CO2/kg material 1.5
1.9
Embodied Energy, MJ/kg 21
27
Embodied Water, L/kg 43
97

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 17 to 80
98
Resilience: Unit (Modulus of Resilience), kJ/m3 280 to 1330
140
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
17
Strength to Weight: Bending, points 18 to 29
17
Thermal Diffusivity, mm2/s 8.9 to 10
7.2
Thermal Shock Resistance, points 17 to 35
17

Alloy Composition

Carbon (C), % 3.0 to 3.5
0 to 0.040
Chromium (Cr), % 0
10.5 to 12.5
Iron (Fe), % 93.7 to 95.5
84.2 to 88.9
Manganese (Mn), % 0
0 to 1.0
Nickel (Ni), % 0
0.6 to 1.1
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 0.030