Gold Foil

Designed for high-performance environments, Goodfellow's Gold Foil delivers exceptional purity and reliability - ideal for electronics, aerospace, biomedical implants, and scientific applications. Produced from 99.9% to 99.999% pure gold with ultra-tight thickness ranges (0.001 mm to 2 mm), it integrates seamlessly into assemblies where precision, quality, and repeatability matter. We offer in lengths and widths from 5 mm to 150 mm with optional polishing on both sides. Gold’s chemical inertness ensures corrosion resistance in aggressive environments, while its high melting point and boiling point support reliable performance under extreme heat. Its high density also delivers strength and stability even for ultrathin foils. Owing to its low electrical resistivity, it excels in high-frequency RF/microwave circuits, and its optical reflectivity supports use in infrared sensors and thermal control coatings. Combined with catalytic activity, biocompatibility and chemical stability, these properties make our gold foil the top choice for electrodes, connectors, thermal control coatings, and implantable medical devices.

Formula: Au
Percentage Purity: 99.95%
Temper: As Rolled
Thickness: 1mm
Length 1: 50mm
Length 2: 50mm
CAS Number: 7440-57-5
UOM Code: 960-575-67
Legacy Code: AU000390
Distributor Code: GF96057567

SKU: 1000032015

Product Code: AU00-FL-000390

Wishlist

Tolerances

Foil/Film/Sheet

Thickness	<0.01mm	±25%
Thickness	0.01mm - 0.05mm	±15%
Thickness	>0.05mm	±10%

Tolerances

Foil/Film/Sheet

Thickness	<0.01mm	±25%
Thickness	0.01mm - 0.05mm	±15%
Thickness	>0.05mm	±10%

Technical Data Sheet

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Safety Data Sheet

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No Minimum order Approx. 2 weeks leadtime Free technical support *Free delivery worldwide

Material Properties for Precious Metals

Atomic Properties

Element	Value
Atomic number	79
Crystal structure	Face centred cubic
Electronic structure	Xe 4f¹⁴ 5d¹⁰ 6s¹
Valences shown	1,3
Atomic weight( amu )	196.9665
Thermal neutron absorption cross-section( Barns )	98.8
Photo-electric work function( eV )	4.8
Atomic radius - Goldschmidt( nm )	0.144
Ionisation potential( No./eV )	1/ 9.22
Ionisation potential( No./eV )	2/ 20.5

Mechanical Properties

Element	Value
Material condition	Soft
Material condition	Hard
Poisson's ratio	0.42
Poisson's ratio	0.42
Bulk modulus( GPa )	171
Bulk modulus( GPa )	171
Tensile modulus( GPa )	78.5
Tensile modulus( GPa )	78.5
Hardness - Vickers( kgf mm⁻² )	20-30
Hardness - Vickers( kgf mm⁻² )	60
Tensile strength( MPa )	130
Tensile strength( MPa )	220
Yield strength( MPa )	205
Yield strength( MPa )	-

Electrical Properties

Element	Value
Electrical resistivity( µOhmcm )	2.20@20@20°C
Temperature coefficient( K⁻¹ )	0.004@0-100°C
Thermal emf against Pt (cold 0C - hot 100C)( mV )	0.74

Physical Properties

Element	Value
Boiling point( C )	3080
Density( gcm⁻³ )	19.3@20°C

Thermal Properties

Element	Value
Melting point( C )	1064.4
Latent heat of evaporation( J g⁻¹ )	1738
Latent heat of fusion( J g⁻¹ )	64.9
Specific heat( J K⁻¹ kg⁻¹ )	129@25°C
Thermal conductivity( W m⁻¹ K⁻¹ )	318@0-100°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	14.1@0-100°C