Wrought machinable brass alloy
A wrought machinable low copper, silicon, zinc alloy having a copper content between about 66 weight percent and about 69 weight percent and wherein the silicon content is between about 1.53 weight percent and about 2.0 weight percent.
1. A wrought machinable, dezincification-resistant, low lead, low copper, silicon, zinc alloy consisting of between about 66 weight percent and 69 weight percent copper; greater than 1.53 weight percent and less than 2 weight percent silicon wherein the silicon content further satisfies the equation 0.167*Cu−9.28>Si>0.132*Cu−7.66; up to about 0.25 weight percent lead; up to about 0.15 weight percent phosphorus; up to about 0.5 weight percent iron; up to about 1.2 weight percent tin; up to about 2.5 weight percent aluminum; up to about 0.25 weight percent nickel; up to about 0.25 weight percent cobalt; up to about 0.15 weight percent arsenic; up to about 0.15 weight percent antimony; up to about 0.25 weight percent bismuth; up to about 0.25 weight percent selenium; up to 0.25 weight percent sulfur; and at least one of: up to 0.4 tellurium; up to 0.1 weight percent zirconium; up to 0.2 weight percent chromium; and at least one of: up to 0.1 weight percent lithium; up to 0.2 weight percent boron; and up to about 0.5 weight percent mischmetal; and the balance zinc and unavoidable impurities, wherein the alloy has been worked and heated sufficiently to produce a microstructure with a corrosion penetration 200 μm tested according to ISO 6509 Protocol.
2. The wrought machinable, dezincification-resistant, low lead, low copper, silicon, zinc alloy of claim 1 wherein there is at least 0.0005 weight percent zirconium.
3. The wrought machinable, dezincification-resistant, low lead, low copper, silicon, zinc alloy of claim 1 wherein there is at least 0.01 weight percent chromium.
4. The wrought machinable, dezincification-resistant, low lead, low copper, silicon, zinc alloy of claim 1 wherein there is at least 0.02 weight percent tellurium.
5. The wrought machinable, dezincification-resistant, low lead, low copper, silicon, zinc alloy of claim 1 wherein there is at least 0.0005 weight percent boron.
6. The wrought machinable, dezincification-resistant, low lead, low copper, silicon, zinc alloy of claim 1 wherein there is at least 0.0005 weight percent lithium.
7. The wrought machinable, dezincification-resistant, low lead, low copper, silicon, zinc alloy of claim 1 wherein there is at least 0.01 weight percent mischmetal.