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ASTM B685 Alloy vs. C85800 Brass

ASTM B685 alloy belongs to the otherwise unclassified metals classification, while C85800 brass belongs to the copper alloys. They have 40% of their average alloy composition in common. There are 17 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is ASTM B685 alloy and the bottom bar is C85800 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
100
Poisson's Ratio 0.37
0.31
Shear Modulus, GPa 43
40
Tensile Strength: Ultimate (UTS), MPa 660 to 1060
380

Thermal Properties

Latent Heat of Fusion, J/g 180
170
Melting Completion (Liquidus), °C 1230
900
Melting Onset (Solidus), °C 1200
870
Specific Heat Capacity, J/kg-K 300
380
Thermal Expansion, µm/m-K 14
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 5.0
20
Electrical Conductivity: Equal Weight (Specific), % IACS 4.1
22

Otherwise Unclassified Properties

Density, g/cm3 11
8.0

Common Calculations

Stiffness to Weight: Axial, points 6.1
7.2
Stiffness to Weight: Bending, points 15
20
Strength to Weight: Axial, points 17 to 27
13
Strength to Weight: Bending, points 16 to 21
15
Thermal Shock Resistance, points 28 to 46
13

Alloy Composition

Aluminum (Al), % 0 to 0.0050
0 to 0.55
Antimony (Sb), % 0
0 to 0.050
Arsenic (As), % 0
0 to 0.050
Cadmium (Cd), % 0 to 0.050
0
Copper (Cu), % 39.5 to 40.5
57 to 69
Iron (Fe), % 0 to 0.050
0 to 0.5
Lead (Pb), % 0 to 0.030
0 to 1.5
Manganese (Mn), % 0
0 to 0.25
Nickel (Ni), % 0
0 to 0.5
Palladium (Pd), % 59 to 60.5
0
Phosphorus (P), % 0
0 to 0.010
Silicon (Si), % 0
0 to 0.25
Silver (Ag), % 0 to 0.1
0
Sulfur (S), % 0
0 to 0.050
Tin (Sn), % 0
0 to 1.5
Zinc (Zn), % 0 to 0.060
31 to 41
Residuals, % 0
0 to 1.3