Low Melting Point Alloys
Lens 136 Alloy
H.G. Lens Alloy is one of an interesting range of bismuth-based alloys to which the element indium is added to give a substantially lower melting point. Lens Alloy is eutectic, i.e. it has a sharp melting point, in this case on 58°C. At this low temperature it has proved ideal for use as a holding medium or ‘button’ in lens grinding and is rapidly replacing pitch previously used. It is easily melted and having extremely stable characteristics, can be re-used repeatedly.
Lens Alloy is manufactured from virgin materials and will give complete satisfaction under normal working conditions.
- Melting point: (Eutectic) 58°C
- Weight lb/in3 : (approx) 0.30
- Brinell hardness: (approx) 14
- Growth after casting (approx) 0.0002” per inch
- Holding glasses lenses during grinding operations.
- Proof casting where low temperatures are necessary.
- Fusible mandrels.
- Fuses for safety devices.