MAP Metal Products and Fabrication Metal and Welding

MAP Metal Products and Fabrication

Metal and Welding • One must know the type of metal before welding – If some metals are mixed they can produce a bad reaction – If some metals are mixed properly they can form a strong joint

Weldability • Definition – The ease with which a metal can be welded properly • Good Weldability: Almost any process can be used to produce acceptable welds and little effort is needed to control the procedures • Poor Weldability: The processes used are limited and that the preparation of the joint and the procedure used for fabrication must be controlled carefully.

Before Welding • Before welding can occur one must identify the type of metal • Once the metal has been identified the type of electrode or filler metal must be selected – Electrodes and filler rods are comprised of different types of metals.

Filler Metal Examples MIG Welding Wire Gas Welding Rod Stick Welding Electrodes

Ferrous Metal • Ferrous Metal: Describes any metal that is derived from iron. • Iron Ore: What is mined to create workable ferrous metal. • Steel: Iron that contain carbon in different amounts. – Iron and carbon in steel are packed closer together. Therefore steel is more dense.

Ferrous Metal Examples Galvanized Steel Power Line Pole Steel Wool Steel Products Example Railway Rail

Non-Ferrous Metals • Non-Ferrous Metal: Any metal that is not derived from iron. • Examples: – Aluminum – Copper – Brass – Silver – Gold

NCWHS Lab Metals • The NCWHS Lab will utilize the following metals – Aluminum: For turning and milling apps. – Brass: For turning and milling apps. – Steel: For welding and fabrication apps.

NCWHS Metal Examples Aluminum Round Stock Steel Tubing Steel Plate Brass Round Stock Threaded Round Stock

Metal Apps • Aluminum • Used for turning because it is light in weight and density • Material can be easily machined • enhances the life and quality of the cutting tools

Metal Apps (II) • Brass • Used for turning and machining because its softer than steel • Has a bright gold type appearance • Because it’s a soft material the cutting tool life is enhanced

Metal Apps (III) • Steel • Used predominately for welding and fabricating ops in the NCWHS lab • High in strength and is a ferrous metal • Heavier than aluminum and brass. • Machined harder than aluminum and brass • The least expensive of most industrial metals • Classified by the carbon content

I Iron ore pellets for the production of steel

Bauxite or aluminum ore, the source of aluminum.