noun
non-ferrous metal
Technical term for metals other than iron, such as aluminum, copper, and titanium.
非鉄金属のリサイクルは環境にとって重要です。
Recycling non-ferrous metals is important for the environment.
Refers to iron and steel, the opposite category of metals.
Compound of 非 (hi, 'non-') + 鉄 (tetsu, 'iron') + 金属 (kinzoku, 'metal').