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Automotive Malleable Cast Iron vs. EN 1.4122 Stainless Steel

Both automotive malleable cast iron and EN 1.4122 stainless steel are iron alloys. They have 82% 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 1.4122 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180
200
Elongation at Break, % 1.0 to 10
14
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 70
77
Tensile Strength: Ultimate (UTS), MPa 350 to 720
790 to 850
Tensile Strength: Yield (Proof), MPa 220 to 590
450 to 630

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
15
Thermal Expansion, µm/m-K 14
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.7
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
9.5
Density, g/cm3 7.6
7.7
Embodied Carbon, kg CO2/kg material 1.5
2.4
Embodied Energy, MJ/kg 20
33
Embodied Water, L/kg 45
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 6.8 to 30
93 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 950
520 to 1000
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 13 to 26
28 to 31
Strength to Weight: Bending, points 14 to 24
25 to 26
Thermal Diffusivity, mm2/s 11
4.0
Thermal Shock Resistance, points 9.9 to 21
28 to 30

Alloy Composition

Carbon (C), % 2.2 to 2.9
0.33 to 0.45
Chromium (Cr), % 0
15.5 to 17.5
Iron (Fe), % 93.6 to 96.7
77.2 to 83.4
Manganese (Mn), % 0.15 to 1.3
0 to 1.5
Molybdenum (Mo), % 0
0.8 to 1.3
Nickel (Ni), % 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 1.0
Sulfur (S), % 0.020 to 0.2
0 to 0.015

Comparable Variants