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AM60A Magnesium vs. AISI 431 Stainless Steel

AM60A magnesium belongs to the magnesium alloys classification, while AISI 431 stainless steel belongs to the iron 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 AM60A magnesium and the bottom bar is AISI 431 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 62
250
Elastic (Young's, Tensile) Modulus, GPa 45
200
Elongation at Break, % 8.8
15 to 17
Fatigue Strength, MPa 70
430 to 610
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 18
77
Shear Strength, MPa 130
550 to 840
Tensile Strength: Ultimate (UTS), MPa 230
890 to 1380
Tensile Strength: Yield (Proof), MPa 130
710 to 1040

Thermal Properties

Latent Heat of Fusion, J/g 350
280
Maximum Temperature: Mechanical, °C 120
850
Melting Completion (Liquidus), °C 620
1510
Melting Onset (Solidus), °C 550
1450
Specific Heat Capacity, J/kg-K 1000
480
Thermal Conductivity, W/m-K 62
26
Thermal Expansion, µm/m-K 26
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 13
2.6
Electrical Conductivity: Equal Weight (Specific), % IACS 69
3.0

Otherwise Unclassified Properties

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

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 17
140 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 190
1270 to 2770
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 71
25
Strength to Weight: Axial, points 37
32 to 50
Strength to Weight: Bending, points 49
27 to 36
Thermal Diffusivity, mm2/s 37
7.0
Thermal Shock Resistance, points 14
28 to 43

Alloy Composition

Aluminum (Al), % 5.5 to 6.5
0
Carbon (C), % 0
0 to 0.2
Chromium (Cr), % 0
15 to 17
Copper (Cu), % 0 to 0.35
0
Iron (Fe), % 0
78.2 to 83.8
Magnesium (Mg), % 91.8 to 94.4
0
Manganese (Mn), % 0.13 to 0.6
0 to 1.0
Nickel (Ni), % 0 to 0.030
1.3 to 2.5
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 0 to 0.22
0