RM materials

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R.M materials
- Plastics
  - Thermoset plastic
    - Can only be heated and shaped once.
  - Thermoplastics
    - can be heated and shaped many times.
- composite materials
  - Are formed by combining and bonding 2 or more materials.
  - MDF
    - Density of fiberboard.
  - Alloys
    - mixtures of 2 or more metals
- Metals
  - Ferrous
    - contain iron
  - Non-ferrous
    - dose not contain iron
- woods
  - Hardwoods
    - From trees that shed their leaves in the winter.
    - E.G. oak, beech, ash, maple, cherry
    - Properties:
  - Softwoods
    - Are from coniferous tress which have needles instead of leaves.
    - E.G. pine, redwood
    - Properties: less dense, less durable.
engineered wood made of compressed wood and fiber partials held together with glue.
- MDF
  - Density of fiberboard.
A pure metal is an element eg iron, copper, gold
- Metals
  - Ferrous
    - contain iron
  - Non-ferrous
    - dose not contain iron

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