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Automotive Malleable Cast Iron vs. S30441 Stainless Steel

Both automotive malleable cast iron and S30441 stainless steel are iron alloys. They have 69% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is automotive malleable cast iron and the bottom bar is S30441 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 130 to 290
170
Elastic (Young's, Tensile) Modulus, GPa 180
200
Elongation at Break, % 1.0 to 10
45
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 70
76
Tensile Strength: Ultimate (UTS), MPa 350 to 720
580
Tensile Strength: Yield (Proof), MPa 220 to 590
230

Thermal Properties

Latent Heat of Fusion, J/g 260
300
Melting Completion (Liquidus), °C 1410
1420
Melting Onset (Solidus), °C 1370
1370
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 41
15
Thermal Expansion, µm/m-K 14
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.7
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
18
Density, g/cm3 7.6
7.8
Embodied Carbon, kg CO2/kg material 1.5
3.4
Embodied Energy, MJ/kg 20
50
Embodied Water, L/kg 45
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 6.8 to 30
210
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 950
140
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 13 to 26
21
Strength to Weight: Bending, points 14 to 24
20
Thermal Diffusivity, mm2/s 11
4.0
Thermal Shock Resistance, points 9.9 to 21
13

Alloy Composition

Carbon (C), % 2.2 to 2.9
0 to 0.080
Chromium (Cr), % 0
17.5 to 19.5
Copper (Cu), % 0
1.5 to 2.5
Iron (Fe), % 93.6 to 96.7
62 to 71.7
Manganese (Mn), % 0.15 to 1.3
0 to 2.0
Nickel (Ni), % 0
8.0 to 10.5
Niobium (Nb), % 0
0.1 to 0.5
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0.020 to 0.15
0 to 0.045
Silicon (Si), % 0.9 to 1.9
1.0 to 2.0
Sulfur (S), % 0.020 to 0.2
0 to 0.030
Tungsten (W), % 0
0.2 to 0.8