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Automotive Malleable Cast Iron vs. EN 1.4971 Stainless Steel

Both automotive malleable cast iron and EN 1.4971 stainless steel are iron alloys. They have a modest 32% of their average alloy composition in common, which, by itself, doesn't mean much. There are 26 material properties with values for both materials. Properties with values for just one material (7, 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 1.4971 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 130 to 290
240
Elastic (Young's, Tensile) Modulus, GPa 180
210
Elongation at Break, % 1.0 to 10
34
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 70
81
Tensile Strength: Ultimate (UTS), MPa 350 to 720
800
Tensile Strength: Yield (Proof), MPa 220 to 590
340

Thermal Properties

Latent Heat of Fusion, J/g 260
300
Melting Completion (Liquidus), °C 1410
1460
Melting Onset (Solidus), °C 1370
1410
Specific Heat Capacity, J/kg-K 480
450
Thermal Conductivity, W/m-K 41
13
Thermal Expansion, µm/m-K 14
15

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
70
Density, g/cm3 7.6
8.4
Embodied Carbon, kg CO2/kg material 1.5
7.6
Embodied Energy, MJ/kg 20
110
Embodied Water, L/kg 45
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 6.8 to 30
220
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 950
280
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 13 to 26
26
Strength to Weight: Bending, points 14 to 24
23
Thermal Diffusivity, mm2/s 11
3.4
Thermal Shock Resistance, points 9.9 to 21
19

Alloy Composition

Carbon (C), % 2.2 to 2.9
0.080 to 0.16
Chromium (Cr), % 0
20 to 22.5
Cobalt (Co), % 0
18.5 to 21
Iron (Fe), % 93.6 to 96.7
24.3 to 37.1
Manganese (Mn), % 0.15 to 1.3
0 to 2.0
Molybdenum (Mo), % 0
2.5 to 3.5
Nickel (Ni), % 0
19 to 21
Niobium (Nb), % 0
0.75 to 1.3
Nitrogen (N), % 0
0.1 to 0.2
Phosphorus (P), % 0.020 to 0.15
0 to 0.035
Silicon (Si), % 0.9 to 1.9
0 to 1.0
Sulfur (S), % 0.020 to 0.2
0 to 0.015
Tungsten (W), % 0
2.0 to 3.0