AuAg9Cu16

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Description

The gold color jewelery alloy AuAg9Cu16 (in the literature also Au75Ag9Cu16, 750Au-90Ag-160Cu) corresponds to a fineness of 750/1000 Au, also with 18 carats (24 carats is 1000/1000 Au = fine gold). The alloy (name: 750 Y 4) has a reddish (rosé) color and is used for rings and brooches, wedding rings, chains and braids, as well as for precision castings.

Related Standards

Degussa

This material data has been provided by WIAM.

"Typical" values were obtained via a literature search. "Predicted" values were imputed via artificial intelligence technology. While we have placed significant efforts in ensuring data accuracy, "typical" and "predicted" data should be considered indicative and verified by appropriate material testing. Please do contact us if additional information on the the predicted data method is required.
All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

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Properties

General

Property	Temperature	Value
Density	20.0 °C	15.3 g/cm³ Show Material materials with Density of 15.3 g/cm³

Mechanical

Property	Temperature	Value	Comment
Elastic modulus	23.0 °C	74 - 81 GPa Show Material materials with Elastic modulus of 74 - 81 GPa	Typical for Gold
Hardness, Vickers, 10	20.0 °C	160 [-] Show Material materials with Hardness, Vickers, 10 of 160 [-]
Poisson's ratio	23.0 °C	0.42 [-] Show Material materials with Poisson's ratio of 0.42 [-]	Typical for Gold
Shear modulus	23.0 °C	26 GPa Show Material materials with Shear modulus of 26 GPa	Typical for Gold

Thermal

Property	Temperature	Value	Comment
Coefficient of thermal expansion	23.0 °C	1.4E-5 1/K Show Material materials with Coefficient of thermal expansion of 1.4E-5 1/K	Typical for Gold
Melting point		1064 °C Show Material materials with Melting point of 1064 °C	Typical for Gold
Specific heat capacity	23.0 °C	126 - 138 J/(kg·K) Show Material materials with Specific heat capacity of 126 - 138 J/(kg·K)	Typical for Gold
Thermal conductivity	23.0 °C	292 - 316 W/(m·K) Show Material materials with Thermal conductivity of 292 - 316 W/(m·K)	Typical for Gold

Chemical properties

Property	Value
Copper	16 % Show Material materials with Copper of 16 %
Gold	75 % Show Material materials with Gold of 75 %
Silver	9 % Show Material materials with Silver of 9 %