malleable iron
Technical term in metallurgy for cast iron that has been heat-treated to become malleable.
Malleable iron is a material made by heat-treating cast iron to improve its toughness.
Compound of 可鍛 (かたん, 'malleable') and 鉄 (てつ, 'iron'). The exact historical derivation is uncertain; the term is a modern technical coinage.