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ASTM B541 Gold vs. C99750 Brass

ASTM B541 gold belongs to the otherwise unclassified metals classification, while C99750 brass belongs to the copper alloys. There are 21 material properties with values for both materials. Properties with values for just one material (9, 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 ASTM B541 gold and the bottom bar is C99750 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
130
Elongation at Break, % 6.0 to 14
20 to 30
Poisson's Ratio 0.4
0.32
Shear Modulus, GPa 38
48
Tensile Strength: Ultimate (UTS), MPa 670 to 1180
450 to 520
Tensile Strength: Yield (Proof), MPa 480 to 900
220 to 280

Thermal Properties

Latent Heat of Fusion, J/g 90
200
Melting Completion (Liquidus), °C 1110
840
Melting Onset (Solidus), °C 930
820
Specific Heat Capacity, J/kg-K 170
410
Thermal Expansion, µm/m-K 13
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.7 to 12
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 4.0 to 6.2
2.2

Otherwise Unclassified Properties

Density, g/cm3 17
8.1

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 65 to 91
87 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 1090 to 3830
190 to 300
Stiffness to Weight: Axial, points 3.4
8.6
Stiffness to Weight: Bending, points 9.0
21
Strength to Weight: Axial, points 11 to 19
15 to 18
Strength to Weight: Bending, points 9.8 to 14
16 to 18
Thermal Shock Resistance, points 36 to 63
13 to 15

Alloy Composition

Aluminum (Al), % 0
0.25 to 3.0
Copper (Cu), % 13.5 to 15.5
55 to 61
Gold (Au), % 70.5 to 72.5
0
Iron (Fe), % 0
0 to 1.0
Lead (Pb), % 0
0.5 to 2.5
Manganese (Mn), % 0
17 to 23
Nickel (Ni), % 0
0 to 5.0
Platinum (Pt), % 8.0 to 9.0
0
Silver (Ag), % 4.0 to 5.0
0
Zinc (Zn), % 0.7 to 1.3
17 to 23
Residuals, % 0
0 to 0.3