1.确认:供应商必须在所有报价单和确认采购订单时提及本规范编号。2.成分:铜4.0-5.0硅2.0-3.0铁1.2最大锰0.3最大锌0.2最大钛0.2最大镁0.05最大其他杂质，每个0.05最大其他杂质，总剩余铝0.15最大

1. ACKNOWLEDGMENT: A vendor must mention this specification number in all quotations and when acknowledging purchase orders. 2. COMPOSITION: Copper 4.0 - 5.0 Silioon 2.0 - 3.0 Iron 1.2 max Manganese 0.3 max Zinc 0.2 max Titanium 0.2 max Magnesium 0.05 max Other Impurities, each 0.05 max Other Impurities, total 0.15 max Aluminum remainder