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Automotive Malleable Cast Iron vs. EN 1.4031 Stainless Steel

Both automotive malleable cast iron and EN 1.4031 stainless steel are iron alloys. They have 86% of their average alloy composition in common. There are 27 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 EN 1.4031 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180
190
Elongation at Break, % 1.0 to 10
11 to 13
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 70
76
Tensile Strength: Ultimate (UTS), MPa 350 to 720
670 to 900
Tensile Strength: Yield (Proof), MPa 220 to 590
390 to 730

Thermal Properties

Latent Heat of Fusion, J/g 260
280
Melting Completion (Liquidus), °C 1410
1440
Melting Onset (Solidus), °C 1370
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 41
30
Thermal Expansion, µm/m-K 14
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
3.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.7
3.7

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
7.0
Density, g/cm3 7.6
7.7
Embodied Carbon, kg CO2/kg material 1.5
1.9
Embodied Energy, MJ/kg 20
27
Embodied Water, L/kg 45
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 6.8 to 30
77 to 94
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 950
380 to 1360
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 13 to 26
24 to 32
Strength to Weight: Bending, points 14 to 24
22 to 27
Thermal Diffusivity, mm2/s 11
8.1
Thermal Shock Resistance, points 9.9 to 21
23 to 32

Alloy Composition

Carbon (C), % 2.2 to 2.9
0.36 to 0.42
Chromium (Cr), % 0
12.5 to 14.5
Iron (Fe), % 93.6 to 96.7
83 to 87.1
Manganese (Mn), % 0.15 to 1.3
0 to 1.0
Phosphorus (P), % 0.020 to 0.15
0 to 0.040
Silicon (Si), % 0.9 to 1.9
0 to 1.0
Sulfur (S), % 0.020 to 0.2
0 to 0.015

Comparable Variants