Iron base Si- Mn alloy or iron base Si- Mn- Ni alloy having good crushability and alloy powder thereof

摘要

An object of the present invention is to provide an iron base Si- Mn alloy or an iron base Si- Mn- Ni alloy which can be easily crushed and can be manufactured in large quantity, and alloy powder thereof. An iron base Si- Mn- Ni alloy having good crushability and alloy powder thereof comprises: C: 0. 40 to 1. 20 % by weight, Si: 5. 0 to 12. 0 % by weight, Mn: 19.0 to 42.0 % by weight, optionally Ni: not more than 30 % by weight, and the balance being Fe, with the following equations satisfied: <MATH> <MATH> <MATH> <IMAGE>