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ASTM B780 Alloy vs. CC760S Brass

ASTM B780 alloy belongs to the otherwise unclassified metals classification, while CC760S brass belongs to the copper alloys. They have a modest 25% of their average alloy composition in common, which, by itself, doesn't mean much. There are 16 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is ASTM B780 alloy and the bottom bar is CC760S brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 83
110
Elongation at Break, % 1.1 to 9.1
22
Poisson's Ratio 0.36
0.33
Shear Modulus, GPa 30
42
Tensile Strength: Ultimate (UTS), MPa 330 to 590
180

Thermal Properties

Latent Heat of Fusion, J/g 140
190
Specific Heat Capacity, J/kg-K 270
390
Thermal Expansion, µm/m-K 18
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 70 to 76
38
Electrical Conductivity: Equal Weight (Specific), % IACS 62 to 68
40

Otherwise Unclassified Properties

Density, g/cm3 10
8.6

Common Calculations

Stiffness to Weight: Axial, points 4.5
7.2
Stiffness to Weight: Bending, points 14
19
Strength to Weight: Axial, points 9.1 to 16
5.8
Strength to Weight: Bending, points 11 to 15
8.2
Thermal Shock Resistance, points 16 to 29
6.2

Alloy Composition

Aluminum (Al), % 0
0 to 0.010
Arsenic (As), % 0
0.050 to 0.15
Cadmium (Cd), % 0 to 0.050
0
Copper (Cu), % 23.5 to 25.7
83 to 88
Iron (Fe), % 0 to 0.050
0 to 0.15
Lead (Pb), % 0 to 0.030
0 to 0.5
Manganese (Mn), % 0
0 to 0.1
Nickel (Ni), % 0.35 to 0.65
0 to 0.1
Silicon (Si), % 0
0 to 0.020
Silver (Ag), % 74 to 76
0
Tin (Sn), % 0
0 to 0.3
Zinc (Zn), % 0 to 0.060
10.7 to 17