© COPYRIGHT 1999 THE ESAB GROUP, INC. LESSON I, GLOSSARY





Lesson 1
The Basics of Arc Welding
Lesson 2
Common Electric
Arc Welding Processes
Lesson 3
Covered Electrodes for Welding
Mild Steels
Lesson 4
Covered Electrodes for Welding Low Alloy Steels
Lesson 5
Welding Filler Metals for Stainless Steels
Lesson 6
Carbon & Low Alloy
Steel Filler Metals -
GMAW,GTAW,SAW
Lesson 7
Flux Cored Arc Electrodes Carbon Low Alloy Steels
Lesson 8
Hardsurfacing Electrodes
Lesson 9
Estimating & Comparing Weld Metal Costs
Lesson 10
Reliability of Welding Filler Metals
APPENDIX A LESSON I - GLOSSARY OF TERMS AISI American Iron and Steel Institute Allotropic A material in which the atoms are capable of transforming into two or more crystalline structures at different temperatures. Alternating An electrical current which alternately travels in either direction in a Current conductor.  In 60 cycles per second (60 Hz) AC, the frequency used in the U.S.A., the current direction reverses 120 times every second. Ampere Unit of electrical rate of flow.  Amperage is commonly referred to as the “current” in an electrical circuit. ASME American Society of Mechanical Engineers ASTM American Society for Testing and Materials Atom The smallest particle of an element that posses all of the characteristics of that element.  It consists of protons, neutrons, and electrons. Carbon Steel (Sometimes referred to as mild steel.)  An alloy of iron and carbon. Carbon content is usually below 0.3%. Conductor A material which has a relatively large number of loosely bonded electrons which may move freely when voltage (electrical pressure) is applied.  Metals are good conductors. Constant Current   — (As applied to welding machines.)  A welding power source which will produce a relatively small change in amperage despite changes in voltage caused by a varying arc length.  Used mostly for welding with coated electrodes.

 

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