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EN 1.4971 Stainless Steel vs. Automotive Malleable Cast Iron

Both EN 1.4971 stainless steel and automotive malleable cast iron 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 EN 1.4971 stainless steel and the bottom bar is automotive malleable cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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