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Annealed ASTM B685 Alloy vs. ISO-WD21150-O

Annealed ASTM B685 alloy belongs to the otherwise unclassified metals classification, while ISO-WD21150-O belongs to the magnesium alloys. There are 19 material properties with values for both materials. Properties with values for just one material (12, 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 annealed ASTM B685 alloy and the bottom bar is ISO-WD21150-O.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
45
Elongation at Break, % 23
11
Poisson's Ratio 0.37
0.29
Shear Modulus, GPa 43
17
Shear Strength, MPa 410
150
Tensile Strength: Ultimate (UTS), MPa 660
240

Thermal Properties

Latent Heat of Fusion, J/g 180
350
Melting Completion (Liquidus), °C 1230
600
Melting Onset (Solidus), °C 1200
550
Specific Heat Capacity, J/kg-K 300
990
Thermal Expansion, µm/m-K 14
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 5.0
19
Electrical Conductivity: Equal Weight (Specific), % IACS 4.1
100

Otherwise Unclassified Properties

Density, g/cm3 11
1.7

Common Calculations

Stiffness to Weight: Axial, points 6.1
15
Stiffness to Weight: Bending, points 15
70
Strength to Weight: Axial, points 17
40
Strength to Weight: Bending, points 16
52
Thermal Shock Resistance, points 28
15

Alloy Composition

Aluminum (Al), % 0 to 0.0050
2.4 to 3.6
Cadmium (Cd), % 0 to 0.050
0
Copper (Cu), % 39.5 to 40.5
0 to 0.050
Iron (Fe), % 0 to 0.050
0 to 0.0050
Lead (Pb), % 0 to 0.030
0
Magnesium (Mg), % 0
94 to 97
Manganese (Mn), % 0
0.15 to 0.4
Nickel (Ni), % 0
0 to 0.0050
Palladium (Pd), % 59 to 60.5
0
Silicon (Si), % 0
0 to 0.1
Silver (Ag), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.060
0.5 to 1.5
Residuals, % 0
0 to 0.3