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The self fluxing property of this filler metal is effective on copper only.
For copper-base alloys, such as brass or bronze, the joints should be fluxed.
Should not be used on nickel-base and iron-base alloys, as the phosphorus reacts with the nickel or iron to form brittle compounds at the interface of the joints.
Should not be used where the joints are exposed to sulfur compounds, especially in gases or oils at temperatures above normal room temperature.
Exposure to pressured steam can also result in accelerated corrosion.