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ASTM B685 Alloy vs. ZA-8

ASTM B685 alloy belongs to the otherwise unclassified metals classification, while ZA-8 belongs to the zinc alloys. There are 17 material properties with values for both materials. Properties with values for just one material (19, in this case) are not shown.

For each property being compared, the top bar is ASTM B685 alloy and the bottom bar is ZA-8.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
85 to 86
Poisson's Ratio 0.37
0.26
Shear Modulus, GPa 43
34
Tensile Strength: Ultimate (UTS), MPa 660 to 1060
210 to 370

Thermal Properties

Latent Heat of Fusion, J/g 180
110
Melting Completion (Liquidus), °C 1230
400
Melting Onset (Solidus), °C 1200
380
Specific Heat Capacity, J/kg-K 300
440
Thermal Expansion, µm/m-K 14
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 5.0
28
Electrical Conductivity: Equal Weight (Specific), % IACS 4.1
40

Otherwise Unclassified Properties

Density, g/cm3 11
6.3

Common Calculations

Stiffness to Weight: Axial, points 6.1
7.5
Stiffness to Weight: Bending, points 15
23
Strength to Weight: Axial, points 17 to 27
9.3 to 17
Strength to Weight: Bending, points 16 to 21
12 to 18
Thermal Shock Resistance, points 28 to 46
7.6 to 13

Alloy Composition

Aluminum (Al), % 0 to 0.0050
8.0 to 8.8
Cadmium (Cd), % 0 to 0.050
0 to 0.0060
Copper (Cu), % 39.5 to 40.5
0.8 to 1.3
Iron (Fe), % 0 to 0.050
0 to 0.075
Lead (Pb), % 0 to 0.030
0 to 0.0060
Magnesium (Mg), % 0
0.015 to 0.030
Nickel (Ni), % 0
0 to 0.020
Palladium (Pd), % 59 to 60.5
0
Silicon (Si), % 0
0 to 0.045
Silver (Ag), % 0 to 0.1
0
Tin (Sn), % 0
0 to 0.0030
Zinc (Zn), % 0 to 0.060
89.7 to 91.2
Residuals, % 0 to 0.2
0

Comparable Variants