MUMBAI, India, Aug. 17 -- Intellectual Property India has published a patent application (202621071955 A) filed by Solanki Vijaykumar Hargovandas on June 10, 2026, for Copper-Aluminium-Zinc Filler Alloy Compositions And Methods For Jewellery Brazing And Precious Stone Setting.
Inventor includes Solanki Vijaykumar Hargovandas.
The application for the patent was published on August 14, 2026, under issue no. 33/2026.
Abstract: The invention discloses two copper-based filler alloy compositions —Aurallium WW-F1-E and Aurallium WW-F2-E — for conventional micro-torch brazing, stone setting, and filigree work on Aurallium 900 gold-substitute jewellery, requiring no laser equipment. WW-F1-E comprises 65.00% copper, 6.50% aluminium, 18.00% zinc, 5.00% tin, 3.00% gallium, 1.00% manganese, 0.80% indium, 0.30% germanium, 0.20% silicon, and 0.20% magnesium by weight. WW-F2-E comprises 68.00% copper, 7.00% aluminium, 15.00% zinc, 4.50% tin, 2.50% gallium, 1.30% magnesium, 0.70% manganese, 0.30% silicon, 0.50% indium, and 0.20% titanium by weight. Both achieve a liquidus of 830°C to 855°C, establishing a 140°C thermal safety margin below the Aurallium 900 parent alloy solidus. A six-stage sequential furnace addition protocol for a 5000-gram production batch, utilising five master alloy types under argon atmosphere, a fourteen-pass wire-drawing schedule, and a four- category gemstone thermal compatibility system are disclosed.
Disclaimer: Curated by HT Syndication.
