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Formula: Au 80/Sn 20
Form: Rod
Material: Gold/Tin
Commodity: Precious Metals
Diameter:
3mm
Gold/Tin Alloy Rod (Au80/Sn20) is a eutectic composition renowned for its high melting point (~280 °C), fluxless soldering capability, and superior oxidation resistance, making it highly valued in optoelectronic and microelectronic packaging. This alloy delivers robust mechanical strength and excellent wetting performance, ensuring reliable metallurgical bonds without the contamination risks associated with flux. It is extensively applied in hermetic sealing for high-frequency microwave devices, precision chip brazing for Si and GaAs semiconductors, and durable mounting of laser diodes in photonic modules. The rod form allows for machining into custom preforms, facilitating precision in component assembly and reducing material waste. In research, Au80/Sn20 rods are used to investigate interfacial reaction kinetics, thermal fatigue resistance, and alloy phase stability under high-stress operational conditions. Their combination of metallurgical reliability, high joint integrity, and environmental stability ensures ongoing importance in advanced scientific research and high-reliability manufacturing environments.
Tolerances
Rod
| Diameter | =<10mm | ±10% |
|---|---|---|
| Diameter | >10mm | ±5% |
Material Properties for Precious Metals
Thermal Properties
| Element | Value |
|---|---|
| Melting point( C ) | 280 |
| Thermal conductivity( W m⁻¹ K⁻¹ ) | 57@23°C |
| Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) | 16@20-100°C |
Mechanical Properties
| Element | Value |
|---|---|
| Shear strength( MPa ) | 270-280 |
| Tensile strength( MPa ) | 270-280 |
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