-Metals I & II are often offered together and offer a wide variety of experiences in both hand and machine metal working as well as welding.  Welding applications include oxy-acetylene, electric arc, MIG and TIG. How to read a micrometer How to use and read a dial caliper Ways to Identify Different Types of Metals Alloys of steel -Common Screw Sizes and Threads -Various types of threads -How bolts are graded -Class Of Thread There are three  established Classes of Thread, designated in the Unified series  by adding “A” for screws and “B” for nuts  (or other internal threads) to show definite limits and tolerances. Class lB Thread is that in which a 1 A screw can be run in readily for quick and easy assembly. The hole is classified as 1 B. The  fit is 1 B Thread, and rarely used in modern metalworking. Class 2B Thread  consists of a 2A screw in a 2B hole. This 2B Thread has wide  application, accommodates plating, finishes, and coating to a  limited extent and, therefore, has fair tolerance allowances. Class 3B Thread means a 3A Screw in a 3B Nut or threaded hole for applications where tolerance limits are close. Welding MIG Welding Basics Sample  spot welds This is your goal- The perfect weld Stick Welding Basics Learn how-to-weld.com (great site for welding basics and video demo) Sample MIG welded beads TIG Welding Basics SAW Welding Basics Period D Metals Exam One page (single spaced 12 pt.) report on the properties and characteristics and uses of an exotic metal alloy.  A second page may be used for charts and graphs that may help you  paper         Examples: •       Antimony         •       Arsenic Metal         •       Berylium         •       Bismuth         •       Cadmium         •       Columbium (Niobium)         •       Gallium         •       Germanium         •       Indium         •       Lithium •  Selenium & Tellurium Others: Titanium, zirconium, tantalum, niobium *Note all sources and NO text cut and paste! Due Tues.Jan 24    Home