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AISI 431 Stainless Steel vs. AM60B Magnesium

AISI 431 stainless steel belongs to the iron alloys classification, while AM60B magnesium belongs to the magnesium alloys. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is AISI 431 stainless steel and the bottom bar is AM60B magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
62
Elastic (Young's, Tensile) Modulus, GPa 200
45
Elongation at Break, % 15 to 17
11
Fatigue Strength, MPa 430 to 610
96
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
17
Shear Strength, MPa 550 to 840
140
Tensile Strength: Ultimate (UTS), MPa 890 to 1380
230
Tensile Strength: Yield (Proof), MPa 710 to 1040
130

Thermal Properties

Latent Heat of Fusion, J/g 280
350
Maximum Temperature: Mechanical, °C 850
120
Melting Completion (Liquidus), °C 1510
620
Melting Onset (Solidus), °C 1450
540
Specific Heat Capacity, J/kg-K 480
1000
Thermal Conductivity, W/m-K 26
61
Thermal Expansion, µm/m-K 12
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.6
13
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
72

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
12
Density, g/cm3 7.7
1.7
Embodied Carbon, kg CO2/kg material 2.2
23
Embodied Energy, MJ/kg 31
160
Embodied Water, L/kg 120
990

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 180
21
Resilience: Unit (Modulus of Resilience), kJ/m3 1270 to 2770
190
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
71
Strength to Weight: Axial, points 32 to 50
38
Strength to Weight: Bending, points 27 to 36
50
Thermal Diffusivity, mm2/s 7.0
37
Thermal Shock Resistance, points 28 to 43
14

Alloy Composition

Aluminum (Al), % 0
5.5 to 6.5
Carbon (C), % 0 to 0.2
0
Chromium (Cr), % 15 to 17
0
Copper (Cu), % 0
0 to 0.010
Iron (Fe), % 78.2 to 83.8
0 to 0.0050
Magnesium (Mg), % 0
92.6 to 94.3
Manganese (Mn), % 0 to 1.0
0.24 to 0.6
Nickel (Ni), % 1.3 to 2.5
0 to 0.0020
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 0.1
Sulfur (S), % 0 to 0.030
0
Zinc (Zn), % 0
0 to 0.22