h62黄铜含铅吗

我记得有一次在跳蚤市场发现一把老式黄铜钥匙。钥匙表面泛着淡淡的黄色光泽，看上去十分古老。 When I brought it home and lightly polished it with sandpaper, the key material was very hard and felt heavy when I held it in my hand. Suddenly a thought occurred to me, 'This key is made of brass.它含有铅吗？
黄铜是一种铜锌合金。通常，黄铜中添加有铅。 This addition lowers the melting point of brass, making it easier to cast and machine. However, when I checked the information, I found that starting in the 1970s, many countries began restricting or banning the addition of lead to brass for health and safety reasons.
According to the data I found, Korea also implemented related standards around 2000, specifying that the lead content in consumer goods should not exceed a certain limit. So, if your key is new, it is highly unlikely that it contains lead.
但是，这把钥匙的确切生产年份未知。 Could it be from an earlier era, and did brass products from that time also contain lead? Answering this question may require more historical data and expertise.

是的，H62 铜含有铅。这个东西里加了铅，是为了提高加工性能。

h62黄铜含有铅。 铜合金，通常含有铅。