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ASTM B541 Gold vs. C37700 Brass

ASTM B541 gold belongs to the otherwise unclassified metals classification, while C37700 brass belongs to the copper alloys. There are 22 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 C37700 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
100
Elongation at Break, % 6.0 to 14
40
Poisson's Ratio 0.4
0.31
Shear Modulus, GPa 38
39
Shear Strength, MPa 410 to 690
270
Tensile Strength: Ultimate (UTS), MPa 670 to 1180
400
Tensile Strength: Yield (Proof), MPa 480 to 900
160

Thermal Properties

Latent Heat of Fusion, J/g 90
170
Melting Completion (Liquidus), °C 1110
890
Melting Onset (Solidus), °C 930
880
Specific Heat Capacity, J/kg-K 170
380
Thermal Expansion, µm/m-K 13
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.7 to 12
27
Electrical Conductivity: Equal Weight (Specific), % IACS 4.0 to 6.2
30

Otherwise Unclassified Properties

Density, g/cm3 17
8.1

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 65 to 91
130
Resilience: Unit (Modulus of Resilience), kJ/m3 1090 to 3830
120
Stiffness to Weight: Axial, points 3.4
7.1
Stiffness to Weight: Bending, points 9.0
19
Strength to Weight: Axial, points 11 to 19
14
Strength to Weight: Bending, points 9.8 to 14
15
Thermal Shock Resistance, points 36 to 63
13

Alloy Composition

Copper (Cu), % 13.5 to 15.5
58 to 61
Gold (Au), % 70.5 to 72.5
0
Iron (Fe), % 0
0 to 0.3
Lead (Pb), % 0
1.5 to 2.5
Platinum (Pt), % 8.0 to 9.0
0
Silver (Ag), % 4.0 to 5.0
0
Zinc (Zn), % 0.7 to 1.3
35.7 to 40.5
Residuals, % 0
0 to 0.5