谁能告诉我20锰的化学成分

20Mn化学成分:
含C量为0.17-0.24%
含硅量为0.17-0.37%
含锰量为0.7-1.0%
含磷<=0.035%
含硫<=0.035%
含铬量<=0.25%
含镍量<=0.25%

20锰的化学成分是;
含C量为0.17-0.24%
含硅量为0.17-0.37%
含锰量为0.7-1.0%
含磷<=0.035%
含硫<=0.035%
含铬量<=0.25%
含镍量<=0.25%
你对化学的研究已经深入到20锰了呀,真是难能可贵啊!