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AZ91B Magnesium vs. Type 2 Pewter

AZ91B magnesium belongs to the magnesium alloys classification, while Type 2 pewter belongs to the otherwise unclassified metals. There are 20 material properties with values for both materials. Properties with values for just one material (13, 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 AZ91B magnesium and the bottom bar is Type 2 pewter.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 63
13 to 23
Elastic (Young's, Tensile) Modulus, GPa 46
52
Poisson's Ratio 0.29
0.35
Shear Modulus, GPa 18
19
Tensile Strength: Ultimate (UTS), MPa 240
52 to 68

Thermal Properties

Latent Heat of Fusion, J/g 360
69
Melting Completion (Liquidus), °C 600
300
Melting Onset (Solidus), °C 470
240
Specific Heat Capacity, J/kg-K 990
220
Thermal Expansion, µm/m-K 26
21

Otherwise Unclassified Properties

Base Metal Price, % relative 12
75
Density, g/cm3 1.7
7.3
Embodied Carbon, kg CO2/kg material 22
12
Embodied Energy, MJ/kg 160
210
Embodied Water, L/kg 990
1220

Common Calculations

Stiffness to Weight: Axial, points 15
3.9
Stiffness to Weight: Bending, points 69
17
Strength to Weight: Axial, points 38
2.0 to 2.6
Strength to Weight: Bending, points 49
4.3 to 5.1
Thermal Shock Resistance, points 14
3.4 to 4.4

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0
Antimony (Sb), % 0
5.0 to 7.5
Arsenic (As), % 0
0 to 0.050
Copper (Cu), % 0 to 0.35
1.5 to 3.0
Iron (Fe), % 0
0 to 0.015
Lead (Pb), % 0
0 to 0.050
Magnesium (Mg), % 87.9 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0
Nickel (Ni), % 0 to 0.030
0
Silicon (Si), % 0 to 0.5
0
Tin (Sn), % 0
90 to 93
Zinc (Zn), % 0.35 to 1.0
0 to 0.0050