BT1 - Metals

For surface hardening

Aluminum

For corrosion resistance

Chromium

Higher carbon content increases the strength and hardness of metal but reduces its ductility and weldability

True

A malleable alloy of iron and carbon

Steel

• Produced from pig iron in such a way as to remove nearly all the carbon and other impurities

• Common uses: Roofing sheets, wire and metal ornaments

Wrought Iron

Iron coated with zinc to prevent rust. The process is achieved thru hot-dip galvanizing

Galvanized Iron

Type of anodizing process that results in a black-brown finish

Analok

Done by dipping the aluminum profiles into acid electrolyte bath chemicals and then passing an electric current.

Anodizing

• Possess a patina weather reactive surface layer of insoluble green salt

• Common uses: electrical wiring, piping, flashing and roofing material

Copper

• An alloy of copper and zinc which has muted yellow color

• Relatively resistant to tarnishing

Brass

Performed by substantially heating the material until glowing for a while and allowing it to cool slowly

Annealing

Mechanical fastener which before it is installed it consists of a smooth cylindrical shaft with a head on one end.

Rivet

Fabrication process that joins materials, usually metals, or thermoplastics by causing coalescence

Welding

Process in which two or more metal items are joined together by melting and flowing a filler metal into the joint, the filler metal having a relatively low melting point.

Soldering

Identify which one is non-ferrous

Aluminum