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ZK40A Magnesium vs. ASTM A182 Grade F12 Class 2

ZK40A magnesium belongs to the magnesium alloys classification, while ASTM A182 grade F12 class 2 belongs to the iron alloys. There are 30 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 ZK40A magnesium and the bottom bar is ASTM A182 grade F12 class 2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
190
Elongation at Break, % 4.2
22
Fatigue Strength, MPa 190
220
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 17
73
Shear Strength, MPa 160
340
Tensile Strength: Ultimate (UTS), MPa 280
540
Tensile Strength: Yield (Proof), MPa 260
310

Thermal Properties

Latent Heat of Fusion, J/g 340
250
Maximum Temperature: Mechanical, °C 120
430
Melting Completion (Liquidus), °C 600
1460
Melting Onset (Solidus), °C 540
1420
Specific Heat Capacity, J/kg-K 970
470
Thermal Conductivity, W/m-K 110
43
Thermal Expansion, µm/m-K 26
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 130
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 13
2.8
Density, g/cm3 1.8
7.8
Embodied Carbon, kg CO2/kg material 24
1.6
Embodied Energy, MJ/kg 160
21
Embodied Water, L/kg 950
52

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 12
100
Resilience: Unit (Modulus of Resilience), kJ/m3 740
260
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 65
24
Strength to Weight: Axial, points 43
19
Strength to Weight: Bending, points 53
19
Thermal Diffusivity, mm2/s 62
12
Thermal Shock Resistance, points 17
16

Alloy Composition


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Carbon (C), % 0
0.1 to 0.2
Chromium (Cr), % 0
0.8 to 1.3
Iron (Fe), % 0
96.4 to 98.3
Magnesium (Mg), % 94.2 to 96.1
0
Manganese (Mn), % 0
0.3 to 0.8
Molybdenum (Mo), % 0
0.44 to 0.65
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0.1 to 0.6
Sulfur (S), % 0
0 to 0.040
Zinc (Zn), % 3.5 to 4.5
0
Zirconium (Zr), % 0.45 to 1.0
0
Residuals, % 0 to 0.3
0