metals (termi)

• Aluminum


  is a soft, nonmagnetic silvery metal
• Aluminum


  characterized by its lineweight
• Aluminum 


  High termal and electrical conductivity
• Aluminum


  Moderately high coefficient, combines with oxygen to form aluminum oxide
• aluminum


  Readily attacked by alkalis, hydrochloric acid, and dilute acids
• Aluminum


  Subject to galvanic action and should therefore be electrically insulated from direct contact
• Aluminum


  easily worked, can be hot or cold rolled
• Aluminum 


  Can be riveted, bolted, welded
• In architectural work all fabricates forms of aluminum are used for:

  rod, bar extrusion, casting, sheet strip
• Extrusion


  Process of shaping material by forcing it to flow through a shaped opening in a die
• Alclad


  Term applied to certain aluminum products, refers to the protective coating (cladding) applied
• Cladding


  Improves the appearance of the alloy; thin, usually consists of pure aluminum
• Aluminum sheet and roofing


  Used for roofing, flashing, gutter, etc
• Aluminum foil


  Rolled to thickness of 0.005 (sheet na siya if mas higher) used mainly for thermal insulation and vapor barriers
• Corrugated aluminum


  this is rigidized sheet fabricated of special aluminum alloys

  usually consists of an aluminum alloy core of one type clad with another
• Structural aluminum


  When aluminum is used as a STRUCTURAL MATERIAL, important factors, arising from its physical and chemical characteristics
• Aluminum doors and windows


  These are generally fabricated from extrusions and rolled shapes
• Aluminum panels and sandwich panels


  Are prefabricated units, generally manufactured....modular and non-modular.....600mm, 900mm, 1200mm
• Sandwich panel


  Comprises a system of construction called skin construction
• Ornamental aluminum


  Many kinds of rods, bars, pipes, railings, fittings and special shapes are manufactured as stock items
• Aluminum mesh and wire cloth


  Used for fencing, particularly chain link fencing and insect screening
• Mechanical finishes


  Obtained by grinding polishing, scratching, sandblasting, embossing, or other treatment
• Chemical finishes


  Based on chemical reactions with the aluminum surface to achieve ffg results: etching (for des, clean surface) and oxidizing (for protect the surface)
• Chemical finishes


  Permit only limited colors that are not as satisfying as the colour films....(anodized)
• Electronic finishes


  Commonly referred as anodized finishes, based on specific ability of aluminum to develop a protective coating
• Architectural gold


  Proven to be one of the most stable from the standpoint of fade resistance
• Electroplating


  Aluminum can be covered with a protective or decorative film or another metsl
• Porcelain or Vitreous Enamel


  Finish forms a hard, resistant surface. Its available in a broad coor range that creates a different feeling
• Paint


  Can be applied as finishes to aluminum surfaces that have been prepared by a suitable chemical treatment
• Pure iron


  Tough, malleable silvery-ehite metal that is soft and ductile as copper

  easily magnetized

  oxidizes rapidly in air

  heating and cooling
• Crude or pig iron


  Commercial form in which iron is first  prepared
• Carbon-iron relationship


  Key to the various types of iron and stee/
• Cast iron


  Iron-carbon alloy that contains more than 1.7 carbon
• Cast iron


  Can be easily cast into any shape, but its too hard and brittle
• Cast iron


  Used in the architectural field mainly for piping and fittings
• Wrought iron


  Almost pure iron with less than 0.1% carbon...0.05%
• Wrought iron


  Contains 2.5% of slag...not alloyed
• Wrought iron


  Soft, malleable, tough fatigue-resistant, and resistant to progressive corrosion
• Wrought iron


  good machinability, can be welded, available in form of pipes so on
• Wrought iron


  Now used in the architectural field primarily in the form of genuine wrought iron pipe