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C87900 Brass vs. ASTM B685 Alloy

C87900 brass belongs to the copper alloys classification, while ASTM B685 alloy belongs to the otherwise unclassified metals. 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 C87900 brass and the bottom bar is ASTM B685 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
120
Poisson's Ratio 0.31
0.37
Shear Modulus, GPa 41
43
Tensile Strength: Ultimate (UTS), MPa 480
660 to 1060

Thermal Properties

Latent Heat of Fusion, J/g 190
180
Melting Completion (Liquidus), °C 930
1230
Melting Onset (Solidus), °C 900
1200
Specific Heat Capacity, J/kg-K 390
300
Thermal Expansion, µm/m-K 20
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 15
5.0
Electrical Conductivity: Equal Weight (Specific), % IACS 17
4.1

Otherwise Unclassified Properties

Density, g/cm3 8.1
11

Common Calculations

Stiffness to Weight: Axial, points 7.3
6.1
Stiffness to Weight: Bending, points 20
15
Strength to Weight: Axial, points 17
17 to 27
Strength to Weight: Bending, points 17
16 to 21
Thermal Shock Resistance, points 16
28 to 46

Alloy Composition


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Aluminum (Al), % 0 to 0.15
0 to 0.0050
Antimony (Sb), % 0 to 0.050
0
Arsenic (As), % 0 to 0.050
0
Cadmium (Cd), % 0
0 to 0.050
Copper (Cu), % 63 to 69.2
39.5 to 40.5
Iron (Fe), % 0 to 0.4
0 to 0.050
Lead (Pb), % 0 to 0.25
0 to 0.030
Manganese (Mn), % 0 to 0.15
0
Nickel (Ni), % 0 to 0.5
0
Palladium (Pd), % 0
59 to 60.5
Phosphorus (P), % 0 to 0.010
0
Silicon (Si), % 0.8 to 1.2
0
Silver (Ag), % 0
0 to 0.1
Sulfur (S), % 0 to 0.050
0
Tin (Sn), % 0 to 0.25
0
Zinc (Zn), % 30 to 36
0 to 0.060
Residuals, % 0
0 to 0.2