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C87400 Brass vs. ASTM B596 Au-Cu

C87400 brass belongs to the copper alloys classification, while ASTM B596 Au-Cu belongs to the otherwise unclassified metals. There are 18 material properties with values for both materials. Properties with values for just one material (11, 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 C87400 brass and the bottom bar is ASTM B596 Au-Cu.

UNS C87400 Silicon BrassASTM B596 Gold-Copper Electrical Contact Alloy
Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
100
Elongation at Break, % 21
4.3 to 17
Poisson's Ratio 0.33
0.41
Shear Modulus, GPa 41
36
Tensile Strength: Ultimate (UTS), MPa 390
450 to 620

Thermal Properties

Latent Heat of Fusion, J/g 250
77
Melting Completion (Liquidus), °C 920
1060
Melting Onset (Solidus), °C 820
930
Specific Heat Capacity, J/kg-K 400
150
Thermal Expansion, µm/m-K 18
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 6.7
14
Electrical Conductivity: Equal Weight (Specific), % IACS 7.2
6.7

Otherwise Unclassified Properties

Density, g/cm3 8.3
18

Common Calculations

Stiffness to Weight: Axial, points 7.4
3.1
Stiffness to Weight: Bending, points 19
8.5
Strength to Weight: Axial, points 13
6.8 to 9.4
Strength to Weight: Bending, points 14
7.1 to 8.8
Thermal Shock Resistance, points 14
22 to 30

Alloy Composition

Aluminum (Al), % 0 to 0.8
0
Copper (Cu), % 79 to 85.5
9.0 to 11
Gold (Au), % 0
89 to 91
Lead (Pb), % 0 to 1.0
0
Silicon (Si), % 2.5 to 4.0
0
Zinc (Zn), % 12 to 16
0
Residuals, % 0
0 to 0.4