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Across 2. Made the first 4 stroke engine 4. Invented the telephone 5. Used as a protective coating 8. Used for electrical wire 10. Hammering metal into shape 14. Nuclear metal 16. Used for cutting tools 18. A light, strong metal 19. Famous NZ climber 21. Worlds highest mountain 22. Lead and tin 25. An ore of Aluminium 27. A big hammer 28. Softening process 31. A very flexible material 33. Colour of acetylene cylinders 35. Modern complex materials 36. Also known as MIG welding 37. Shielding gas 39. An ore of iron 41. Steel is often made in this form 42. Type of steel furnace 44. Used for accurate measuring 45. NZ Explorer 49. A dangerous gas 51. Important part of a lathe 52. Common fuel gas 53. Location of NZ Aluminium industry 54. A non magnetic steel 55. A NZ Prime Minister 56. Often called fibreglass

Down 1. Large metric unit 3. Makes soldering easier 4. Base of a machine 6. Straight between North and South Islands 7. Type of calipers for measuring 9. Used for molten metal 11. A measurement device 12. Iron and Carbon 13. Process to toughen metal 15. Main part of the atmosphere 16. Used in stainless steel 17. Impure form of iron or steel 20. Used to heat metal 23. Used for electrical contacts 24. Common fibre composite 26. A common light metal 29. Colour of oxygen cylinders 30. Copper and zinc 32. Copper and Tin 34. Used in gas welding 35. A lathe slide 36. An expensive metal 38. Measures Temperature 40. Sometimes used in coins 43. Used in light filiaments 46. Used by Blacksmiths 47. Holds the drill bit 48. Famous Cricketer 50. All Black Great