MakeItFrom.com
Menu (ESC)

AISI 431 Stainless Steel vs. Automotive Malleable Cast Iron

Both AISI 431 stainless steel and automotive malleable cast iron are iron alloys. They have 82% of their average alloy composition in common. There are 28 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 AISI 431 stainless steel and the bottom bar is automotive malleable cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
130 to 290
Elastic (Young's, Tensile) Modulus, GPa 200
180
Elongation at Break, % 15 to 17
1.0 to 10
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
70
Tensile Strength: Ultimate (UTS), MPa 890 to 1380
350 to 720
Tensile Strength: Yield (Proof), MPa 710 to 1040
220 to 590

Thermal Properties

Latent Heat of Fusion, J/g 280
260
Melting Completion (Liquidus), °C 1510
1410
Melting Onset (Solidus), °C 1450
1370
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 26
41
Thermal Expansion, µm/m-K 12
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.6
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
1.9
Density, g/cm3 7.7
7.6
Embodied Carbon, kg CO2/kg material 2.2
1.5
Embodied Energy, MJ/kg 31
20
Embodied Water, L/kg 120
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 180
6.8 to 30
Resilience: Unit (Modulus of Resilience), kJ/m3 1270 to 2770
130 to 950
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 32 to 50
13 to 26
Strength to Weight: Bending, points 27 to 36
14 to 24
Thermal Diffusivity, mm2/s 7.0
11
Thermal Shock Resistance, points 28 to 43
9.9 to 21

Alloy Composition

Carbon (C), % 0 to 0.2
2.2 to 2.9
Chromium (Cr), % 15 to 17
0
Iron (Fe), % 78.2 to 83.8
93.6 to 96.7
Manganese (Mn), % 0 to 1.0
0.15 to 1.3
Nickel (Ni), % 1.3 to 2.5
0
Phosphorus (P), % 0 to 0.040
0.020 to 0.15
Silicon (Si), % 0 to 1.0
0.9 to 1.9
Sulfur (S), % 0 to 0.030
0.020 to 0.2