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C69700 Brass vs. ASTM B477 Au-Ni-Ag

C69700 brass belongs to the copper alloys classification, while ASTM B477 Au-Ni-Ag belongs to the otherwise unclassified metals. There are 17 material properties with values for both materials. Properties with values for just one material (13, 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 C69700 brass and the bottom bar is ASTM B477 Au-Ni-Ag.

UNS C69700 Leaded Silicon BrassASTM B477 Gold-Nickel-Silver Electrical Contact Alloy
Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
95
Elongation at Break, % 25
5.5 to 11
Poisson's Ratio 0.32
0.41
Shear Modulus, GPa 41
34
Shear Strength, MPa 300
190 to 320
Tensile Strength: Ultimate (UTS), MPa 470
310 to 550

Thermal Properties

Latent Heat of Fusion, J/g 240
80
Melting Completion (Liquidus), °C 930
1010
Melting Onset (Solidus), °C 880
930
Specific Heat Capacity, J/kg-K 400
160
Thermal Expansion, µm/m-K 19
15

Otherwise Unclassified Properties

Density, g/cm3 8.3
17

Common Calculations

Stiffness to Weight: Axial, points 7.3
3.1
Stiffness to Weight: Bending, points 19
8.9
Strength to Weight: Axial, points 16
5.0 to 9.0
Strength to Weight: Bending, points 16
6.0 to 8.8
Thermal Shock Resistance, points 16
16 to 28

Alloy Composition

Copper (Cu), % 75 to 80
0
Gold (Au), % 0
74.2 to 75.8
Iron (Fe), % 0 to 0.2
0
Lead (Pb), % 0.5 to 1.5
0
Manganese (Mn), % 0 to 0.4
0
Nickel (Ni), % 0
2.6 to 3.4
Silicon (Si), % 2.5 to 3.5
0
Silver (Ag), % 0
21.4 to 22.6
Zinc (Zn), % 13.9 to 22
0
Residuals, % 0
0 to 0.3