Sterling silver manganese alloy compositions

Details Sterling silver manganese alloy compositions Sterling silver manganese alloy compositions

2006-10-31

2006-10-31

Wyszomierski, George (Department: 1742)

Metal treatment

Stock

Noble metal base

C420S504000

Reexamination Certificate

active

07128792

ABSTRACT:
A unique manganese silver alloy composition is provided, which alloy exhibits the long desired properties of exceptional as-cast hardness and reversible heat treatability, in addition to offering reduced fire scale, reduced voids and porosity, reduced grain size, and reduced oxide formation when heated consisting essentially of the following parts by weight: about 92.5–92.8% silver, about 2.0–3.0% copper, about 2.0–3.0% zinc, about 0.03–0.05% indium, about 0.01–0.03% tin, about 0.20–0.50% boron/copper alloy (22% boron, 98.0% copper) about 0.50–0.90% silicon/copper alloy (10.0% silicon, 90.0% copper), and 0.01%–0.10% manganese “30” (0.30% of a manganese-copper alloy containing about 30% manganese and about 70% copper).

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patent: WO 95/14112 (1995-05-01), None

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