Cast iron - FERROUS METALS
properties - hard skin wth soft core, strong under compression but cannot be bent or forged
composition-iron and 3.5% carbon
uses- heavy crushing machinery, car brake discs, vice or machine parts
Mild steel - FERROUS METALS
properties - Tough, ductile and malleable . poor resistance to corrosion: cannot be hardened or tempered
composition- iron and 0.15%-0.35% carbon
uses- General purpose materials : nails, screws, car bodies, furniture frames, building frames and structures
notes- widely available at moderate costs.
Medium carbon steel - FERROUS METALS
properties - strong and hard, difficult to cut and less ductile, tough or malleable .
composition- iron and 0.4%-0.7% carbon
uses- gardening tools, springs
High carbon steel _ FERROUS METALS
properties - very hard , difficult to cut and less ductile , tough or malleable
composition-iron and 0.8%-1.5% carbon
uses- screwdrivers, scissors, chisels
Stainless steel- FERROUS METALS
properties - hard and tough but very good at resisiting corrosion
composition-allow of steel that also includes: chromium, nickel, magnesium
uses- sinks, cutlery, work surfaces, dishes.
notes- very tough, difficult to cut and weld.
High speed steel- FERROUS METALS
properties - very hard, resisitant to friction and can only be sharpened by grinding.
composition- medium carbon steel alloy that also includes ; tungsten, chromium, vandium
uses- lathe cutting tools, drills, milling cutters.
Copper - NON FERROUS METALS
properties - malleable, ductile and tough. good conductor of heat and electricity . easily joined . a green PATINA forms when exposed to air or water for long periods of time
uses- plumbing fittings, electrical equiptment, roofing
notes-can be quite expensive but polishes well used as a decrative roof finish due to green .
ALUMINIUM - NON FERROUS METALS
properties - strong for its weight. light, soft and ductile. good conductor of heat and electricity. difficult to join
composition-pure metal but often used as an alloy
uses- kitchen foils. cooking pans an window frames
notes- a non toxic meterial that polishes well
Zinc- NON FERROUS METALS
properties -very weak and heavy. resists corrosion but very difficult to work. often used to electro plate and hot dip ferrous products
uses- galvanising products to protect from rusting e.g roffings, crash barriers, fencing
notes-greylish sliver colour
Gold - NONFERROUS METALS
properties - a precious metal that is extremely malleable and ductile. highly resistant to corrosion
composition-pure metal but normally used as an alloy that includes: silver, copper, platinum.
uses- jewellery, fold leaf , ornaments, bullion, electrical contacts
notes- highest rating ( 24 carat) means the purrest metal