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US 2016/0102385 A1Published application
Low lead alloy
AssigneeSloan Valve Company
InventorsMichael Murray, Mahi Sahoo
Life of this patent
Estimating the term…
Abstract
A composition for a low lead ingot comprising primarily copper and including tin, zinc, sulfur, phosphorus, nickel. The composition may contain carbon. The low lead ingot, when solidified, includes sulfur or sulfur containing compounds such as sulfides distributed through the ingot. The presence and a substantially uniform distribution of these sulfur compounds imparts improved machinability and better mechanical properties.
Claims20
An alloy composition consisting essentially of:
- a copper content of 82 wt % to 89 wt %;
- a tin content of 2.0 wt % to 4.0 wt %;
- a lead content of less than 0.09 wt %;
- a zinc content of 5.0 wt % to 14.0 wt %;
- an iron content of 0.4 wt % or less but greater than 0 wt %;
- an antimony content of 0.02 wt % or less but greater than 0 wt %;
- a nickel content of 0.5 wt % to 2.0 wt %;
- a sulfur content of 0.01 wt % to 0.65 wt %;
- a phosphorus content of 0.05 wt % or less but greater than 0 wt %;
- an aluminum content of 0.005 wt % or less but greater than 0 wt %;
- a silicon content of 0.005 wt % or less but greater than 0 wt %;
- a manganese content of 0.01% to 0.7 wt %;
- one or more of a zirconium content of 0.2 wt % or less but greater than 0 wt % and a boron content of 0.2 wt % or less but greater than 0 wt %;
- a carbon content of up to 0.1%;
- and
- a titanium content of up to 0.3%.
13 more elements
An alloy composition consisting essentially of:
- a copper content of 82 wt % to 89 wt %;
- a tin content of 2.0 wt % to 4.0 wt %;
- a lead content of 0.09 wt % or less;
- a zinc content of 5.0 wt % to 14.0 wt %;
- an iron content than 0.4 wt % or less;
- an antimony content of 0.02 wt %;
- a nickel content of 0.5 wt % to 2.0 wt %;
- a sulfur content of 0.1 wt % to 0.65 wt %;
- a phosphorus content of 0.05 wt % or less but greater than 0 wt %;
- an aluminum content of 0.005 wt %;
- a silicon content of 0.005 wt % or less;
- a manganese content of 0.01% to 0.7 wt %;
- a zirconium content of 0.2 wt % or less but greater than 0 wt %;
- and
- a boron content of 0.2 wt % or less but greater than 0 wt %.
12 more elements
Dependencies are inferred from the claim text.