Across
- 1. made from coal and almost pure carbon
- 5. chief ore of iron
- 9. mixture of nickel-chromium plus iron
- 10. impure iron
- 12. chemical element which strengths steel
- 13. chemical element used to recycle steel/iron
- 14. Transformation of iron and used by car producers
Down
- 1. mixture added at the top of the furnace
- 2. its chemical structure is CaCO3
- 3. type of iron used for steel
- 4. Extraction of iron from its ore
- 6. Metal that coats the 3rd word of the crossword
- 7. strongest type of steel
- 8. most soft type of iron
- 11. Composes the 6% as an element of the earth’s outer layer