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ZC63A Magnesium vs. ASTM A387 Grade 91 Class 2

ZC63A magnesium belongs to the magnesium alloys classification, while ASTM A387 grade 91 class 2 belongs to the iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (2, 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 ASTM A387 grade 91 class 2.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 60
200
Elastic (Young's, Tensile) Modulus, GPa 48
190
Elongation at Break, % 3.3
20
Fatigue Strength, MPa 94
330
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 19
75
Shear Strength, MPa 130
420
Tensile Strength: Ultimate (UTS), MPa 220
670
Tensile Strength: Yield (Proof), MPa 130
470

Thermal Properties

Latent Heat of Fusion, J/g 330
270
Maximum Temperature: Mechanical, °C 98
600
Melting Completion (Liquidus), °C 550
1460
Melting Onset (Solidus), °C 470
1420
Specific Heat Capacity, J/kg-K 950
470
Thermal Conductivity, W/m-K 120
26
Thermal Expansion, µm/m-K 26
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 32
8.9
Electrical Conductivity: Equal Weight (Specific), % IACS 140
10

Otherwise Unclassified Properties

Base Metal Price, % relative 13
7.0
Density, g/cm3 2.1
7.8
Embodied Carbon, kg CO2/kg material 22
2.6
Embodied Energy, MJ/kg 150
37
Embodied Water, L/kg 920
88

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 6.3
120
Resilience: Unit (Modulus of Resilience), kJ/m3 190
580
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 58
25
Strength to Weight: Axial, points 29
24
Strength to Weight: Bending, points 38
22
Thermal Diffusivity, mm2/s 58
6.9
Thermal Shock Resistance, points 12
19

Alloy Composition


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Aluminum (Al), % 0
0 to 0.020
Carbon (C), % 0
0.080 to 0.12
Chromium (Cr), % 0
8.0 to 9.5
Copper (Cu), % 2.4 to 3.0
0
Iron (Fe), % 0
87.3 to 90.3
Magnesium (Mg), % 89.2 to 91.9
0
Manganese (Mn), % 0.25 to 0.75
0.3 to 0.6
Molybdenum (Mo), % 0
0.85 to 1.1
Nickel (Ni), % 0 to 0.010
0 to 0.4
Niobium (Nb), % 0
0.060 to 0.1
Nitrogen (N), % 0
0.030 to 0.070
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0 to 0.2
0.2 to 0.5
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 0
0 to 0.010
Vanadium (V), % 0
0.18 to 0.25
Zinc (Zn), % 5.5 to 6.5
0
Zirconium (Zr), % 0
0 to 0.010
Residuals, % 0 to 0.3
0