APPENDIX I GLOSSARY
ACC- Air carbon arc cutting.
ARC BLOW- The tendency for an arc to wander or whip from its normal course during arc welding.
ASME- American Society of Mechanical Engineers.
AWS- American Welding Society.
BACKFIRE- Momentary burning back of the flame into the torch tip during welding or cutting.
BACKHAND WELDING- Welding in the direction opposite the direction the gas flame is pointing.
BURR- The sharp edge remaining on metal after cutting.
CARBURIZING FLAME- Produced by burning an excess of fuel gas.
CHAMFER- Bevel angling the metal edge where welding is to take place.
COMPRESSION STRESSES- The stresses developed within a material when forces tend to compress or crush the material.
DCRP- Direct current reverse polarity.
DCSP- Direct current straight polarity.
DISTORTION- The warping of a structure.
DUCTILITY- The property that enables a material to withstand extensive permanent deformation due to tension.
ELASTICITY- The ability of a material to return to its original form after deformation.
FATIGUE-- The tendency of a material to fail after repeated stressing at the same point.
FATIGUE STRENGTH- The ability of a material to resist various kinds of rapidly alternating stresses.
FERROUS- Denotes the family of metals in which iron is the major ingredient.
FLASHBACK- The flame burning in or beyond the torch mixing chamber during welding or cutting.
FLUX- A chemical used to promote fusion of metals during the welding process.
FOREHAND WELDING- Welding in the same direction as the torch flame points.
FUSION-The melting together of metals.
GMAW- Gas metal arc welding.
GTAW- Gas tungsten arc welding.
IMPACT STRENGTH- The ability of a metal to resist suddenly applied loads; measured in footpounds of force.
KERF- The narrow slit formed in metal as cutting progresses.
LAYOUT- The process of measuring and marking materials for cutting, bending, drilling, or welding.
MALLEABILITY- The property that enables a material to withstand permanent deformation caused by compression.
MAPP- A stabilized methyl acetylene-propadiene fuel gas. A Dow Chemical Company product.
METALLOID- A nonmetal that can combine with a metal to form an alloy.
METALLURGY- The science and technology of metals.
MIG- A term used to describe gas metal arc welding (metal inert gas).
NEUTRAL FLAME- Produced when equal amounts of oxygen and fuel gas are burned.
NORMALIZING- A heat-treating operation involving the heating of an iron-base alloy above its critical temperature range and cooling it in still air for the purpose of removing stresses.
NONFERROUS- Metals containing no iron.
OFW- Oxyfuel welding.
OXIDIZING FLAME- Produced by burning about twice as much oxygen as fuel gas.
PASS- A single progression of a welding operation along a joint or weld deposit. The result of a pass is a weld bead.
PLASTICITY- The ability of a material to permanently deform without breaking or rupturing.
POROSITY- The presence of gas pockets or voids in metal.
QUENCHING- The process of rapid cooling from an elevated temperature by contact with fluids or gases.
QUENCHING MEDIUM- The oil, water, brine, or other medium used for rapid cooling.
RSW- Resistance spot welding.
RW- Resistance welding.
SEIZE- To bind securely the end of a wire rope or strand with seizing wire.
SHEARING STRESSES- The stresses developed within a material when external forces are applied along parallel lines in opposite directions.
SMAW- Shielded metal arc welding.
SOAKING- Holding a metal at a required temperature for a specified time to obtain even temperature throughout the section.
STINGER- An electrode holder; a clamping device for holding the electrode securely in any position.
STRESS-External or internal force applied to an objectl
TENSILE STRENGTH- The resistance to being pulled apart.
TENSION STRESSES- The stresses developed when a material is subjected to a pulling load.
TIG- A term used to describe gas tungsten arc welding (tungsten inert gas).
WELD- To join metals by heating them to a melting temperature and causing the molten metal to flow together.
WELDMENT- An assembly whose parts are joined by welding.
ULTIMATE STRENGTH- The maximum strain that a material is capable of withstanding.