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ZC63A Magnesium vs. AISI 431 Stainless Steel

ZC63A 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 (4, 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 ZC63A magnesium and the bottom bar is AISI 431 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 60
250
Elastic (Young's, Tensile) Modulus, GPa 48
200
Elongation at Break, % 3.3
15 to 17
Fatigue Strength, MPa 94
430 to 610
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 19
77
Shear Strength, MPa 130
550 to 840
Tensile Strength: Ultimate (UTS), MPa 220
890 to 1380
Tensile Strength: Yield (Proof), MPa 130
710 to 1040

Thermal Properties

Latent Heat of Fusion, J/g 330
280
Maximum Temperature: Mechanical, °C 98
850
Melting Completion (Liquidus), °C 550
1510
Melting Onset (Solidus), °C 470
1450
Specific Heat Capacity, J/kg-K 950
480
Thermal Conductivity, W/m-K 120
26
Thermal Expansion, µm/m-K 26
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 32
2.6
Electrical Conductivity: Equal Weight (Specific), % IACS 140
3.0

Otherwise Unclassified Properties

Base Metal Price, % relative 13
9.0
Density, g/cm3 2.1
7.7
Embodied Carbon, kg CO2/kg material 22
2.2
Embodied Energy, MJ/kg 150
31
Embodied Water, L/kg 920
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 6.3
140 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 190
1270 to 2770
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 58
25
Strength to Weight: Axial, points 29
32 to 50
Strength to Weight: Bending, points 38
27 to 36
Thermal Diffusivity, mm2/s 58
7.0
Thermal Shock Resistance, points 12
28 to 43

Alloy Composition


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Carbon (C), % 0
0 to 0.2
Chromium (Cr), % 0
15 to 17
Copper (Cu), % 2.4 to 3.0
0
Iron (Fe), % 0
78.2 to 83.8
Magnesium (Mg), % 89.2 to 91.9
0
Manganese (Mn), % 0.25 to 0.75
0 to 1.0
Nickel (Ni), % 0 to 0.010
1.3 to 2.5
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.2
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 5.5 to 6.5
0
Residuals, % 0 to 0.3
0