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一般的黄铜材料中含有一定数量的铅,铅是一种对人体有害的金属元素。美国电话电报公司贝尔实验室的科学家研制成一种新型黄铜,它不添加有害元素铅,而用铋和磷取代之,铋的添加量为1%~2%,磷为微量。不含铅的黄铜@李有观
General brass material contains a certain amount of lead, lead is a harmful metal elements. AT & T’s Bell Labs scientists have developed a new type of brass that does not add harmful elemental lead but replaces it with bismuth and phosphorus. The amount of bismuth added is 1% to 2% and the amount of phosphorus is trace. Lead-free brass @ Lee has a concept