Globular shaped Bismuth inclusion in Lead-free copper based alloy materials

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The present invention refers to copper unit using PSTN brass alloy (Zn)-Zn (cubic) (Pb) and without added, small amount of bismuth (Bi), misch metal (Misch metal), in (P), sulfur (S) by the addition of bismuth (Bi) inhibiting formation (Film) and an interface menagement for automatic track processing of inclusions configured to (Bi) bismuth inclusions menagement for automatic track processing relates to lead-free brass alloy. Menagement for automatic track processing inclusions (Bi) bismuth by the present invention lead-free brass alloy comprises, copper (cubic)-Zn (cubic) 50-70 weight % copper brass alloy (Zn), bismuth (Bi) 0.5-3.5 weight %, misch metal (Misch metal) 0.01-0.3 weight %, in (P) 0.01-0.3 weight %, remaining a zinc-(Zn) content (weight %) a chemical composition to the first, the brass alloy (Zn)-Zn (cubic) copper said sulfur (S) and is added, is 0.1 weight % hereinafter, the brass alloy (Zn)-Zn (cubic) copper said iron (Fe) and the tin the sum of (Sn) is characterised in that added 1.0 weight % hereinafter. According to the present invention the, lead (Pb) patternability, and that is no : 2. the reactions is advantageous in achieving excellent in machining performance..