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Automotive Malleable Cast Iron vs. EN 1.4945 Stainless Steel

Both automotive malleable cast iron and EN 1.4945 stainless steel are iron alloys. They have 63% 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 1.4945 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 130 to 290
200 to 220
Elastic (Young's, Tensile) Modulus, GPa 180
200
Elongation at Break, % 1.0 to 10
19 to 34
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 70
77
Tensile Strength: Ultimate (UTS), MPa 350 to 720
640 to 740
Tensile Strength: Yield (Proof), MPa 220 to 590
290 to 550

Thermal Properties

Latent Heat of Fusion, J/g 260
290
Melting Completion (Liquidus), °C 1410
1490
Melting Onset (Solidus), °C 1370
1440
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 41
14
Thermal Expansion, µm/m-K 14
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.7
3.2

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
30
Density, g/cm3 7.6
8.1
Embodied Carbon, kg CO2/kg material 1.5
5.0
Embodied Energy, MJ/kg 20
73
Embodied Water, L/kg 45
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 6.8 to 30
130 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 950
210 to 760
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 13 to 26
22 to 25
Strength to Weight: Bending, points 14 to 24
20 to 22
Thermal Diffusivity, mm2/s 11
3.7
Thermal Shock Resistance, points 9.9 to 21
14 to 16

Alloy Composition

Carbon (C), % 2.2 to 2.9
0.040 to 0.1
Chromium (Cr), % 0
15.5 to 17.5
Iron (Fe), % 93.6 to 96.7
57.9 to 65.7
Manganese (Mn), % 0.15 to 1.3
0 to 1.5
Nickel (Ni), % 0
15.5 to 17.5
Niobium (Nb), % 0
0.4 to 1.2
Nitrogen (N), % 0
0.060 to 0.14
Phosphorus (P), % 0.020 to 0.15
0 to 0.035
Silicon (Si), % 0.9 to 1.9
0.3 to 0.6
Sulfur (S), % 0.020 to 0.2
0 to 0.015
Tungsten (W), % 0
2.5 to 3.5