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Automotive Malleable Cast Iron vs. EN 1.4581 Stainless Steel

Both automotive malleable cast iron and EN 1.4581 stainless steel are iron alloys. They have 68% of their average alloy composition in common. There are 28 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 automotive malleable cast iron and the bottom bar is EN 1.4581 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 130 to 290
150
Elastic (Young's, Tensile) Modulus, GPa 180
200
Elongation at Break, % 1.0 to 10
28
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 70
78
Tensile Strength: Ultimate (UTS), MPa 350 to 720
510
Tensile Strength: Yield (Proof), MPa 220 to 590
210

Thermal Properties

Latent Heat of Fusion, J/g 260
300
Melting Completion (Liquidus), °C 1410
1440
Melting Onset (Solidus), °C 1370
1400
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 41
15
Thermal Expansion, µm/m-K 14
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.7
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
21
Density, g/cm3 7.6
7.8
Embodied Carbon, kg CO2/kg material 1.5
4.2
Embodied Energy, MJ/kg 20
59
Embodied Water, L/kg 45
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 6.8 to 30
120
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 950
110
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 13 to 26
18
Strength to Weight: Bending, points 14 to 24
18
Thermal Diffusivity, mm2/s 11
3.9
Thermal Shock Resistance, points 9.9 to 21
12

Alloy Composition

Carbon (C), % 2.2 to 2.9
0 to 0.070
Chromium (Cr), % 0
18 to 20
Iron (Fe), % 93.6 to 96.7
61.4 to 71
Manganese (Mn), % 0.15 to 1.3
0 to 1.5
Molybdenum (Mo), % 0
2.0 to 2.5
Nickel (Ni), % 0
9.0 to 12
Niobium (Nb), % 0
0 to 1.0
Phosphorus (P), % 0.020 to 0.15
0 to 0.040
Silicon (Si), % 0.9 to 1.9
0 to 1.5
Sulfur (S), % 0.020 to 0.2
0 to 0.030