De-Ox Silver Alloy: Arctic Fox Anti-Tarnish Silver
(Originally published March 2017)
General Alloy Composition
92.7% silver, copper, zinc, and indium
Suitable for
Casting and fabrication
Melting Temperature Range
Solidus: 1,515°F (824°C)
Liquidus: 1,592°F (867°C)
Hardness (As-Cast) (HV)
• Dwell for 15-20 minutes (after casting, before quenching): About HV 104
• No dwell (less than 3 minutes): About HV 82
Hardness (70% Cold-Work) (HV)
• Fully annealed (dead-soft) before cold working: About HV 82
• As-cast before cold working: About HV 82
• Torch annealed before cold working: About HV 82
Hardness (Age-Hardened) (HV)
• Two-step age hardness: Step 1. 1382°F (750°C), hold 15 minutes, water quench.
Step 2. 572°F (300°C), hold 30–60 minutes, air cool. Hardness about HV 136.
• Single-step age hardness: 1382°F (750°C), 30 minutes, air cool. Hardness about HV 104.
Available Forms
Casting grain, sheet, wire, tubing
Fusing Possible
Yes
Welding Possible
Yes
Quenching Guidelines
The alloy can be quenched after annealing, resulting in a slightly softer material. Wait for the color to turn.
Special Tips for Working with Alloy
Annealing must be done under a reducing atmosphere to prevent the alloy from oxidizing.
Contact
Umicore
1-508-838-2090
usa-salesweb@am.umicore.com