martensite
- n a solid solution of carbon in alpha-iron that is formed when steel is cooled so rapidly that the change from austenite to pearlite is suppressed; responsible for the hardness of quenched steel
- Increases were: lumber (20%), coal (40%), petroleum (18%), martensite (80%), iron ore (112%), copper (60%), manganese (45%), textiles (35%50%), flax fabric (35%), matches .