Iron modified tin brass
AssigneeOlin Corporation
InventorsDennis R. Brauer, John F. Breedis, Ronald N. Caron, Carl Deppisch
Life of this patent
Estimating the term…
Abstract
There is provided a tin brass alloy having a grain structure that is refined by the addition of controlled amounts of both zinc and iron. Direct chill cast alloys containing from 1% to 4%, by weight of tin, from 0.8% to 4% of iron, from an amount effective to enhance iron initiated grain refinement to 20% of zinc and the remainder copper and inevitable impurities are readily hot worked. The zinc addition further increases the strength of the alloy and improves the bend formability in the "good way", perpendicular to the longitudinal axis of a rolled strip.
Claims12
A copper alloy, consisting essentially of:
- from 1% to 4% by weight of tin;
- from 0.8% to 4.0% by weight of iron;
- from 8% to 20% by weight of zinc;
- amount effective to promote the formation of iron phosphide up to 0.4% by weight of phosphorous;
- and
- the remainder copper and inevitable impurities, said alloy having a refined as-cast average crystalline grain size of less than 100 microns and precipitates selected from the group consisting of iron and iron phosphide via dispersion hardening.
Dependencies are inferred from the claim text.