RoHS豁免条例有这么一条:7 N7 D3 A9 Z7 G. D
6. Lead as an alloying element in steel contaiing up to 0.35% lead by weight, aluminum containing up to 0.4% lead by weight and as a copper alloy contaiing up to 4% lead by weight. $ }) q$ H7 w' r! ?* ]铅作为合金元素在钢合金中达0.35%,铝合金中达0.4%和铜合金中达4%;, e0 W6 j; k: V5 Y! f