©
COPYRIGHT 2000 THE ESAB GROUP, INC. LESSON
III APPENDIX
A LESSON
III -
GLOSSARY OF
TERMS Electrode
Core
Wire - The
steel wire about which the coating is applied. The electrode size is
determined by the diameter of the core
wire. Electrode
Coating
- The mixture of chemicals,
minerals and metallic alloys applied to the core wire.
The coating controls the welding current, the welding position, and
provides a shielding atmosphere, deoxidizers
to clean the weld metal, and the
welding slag that absorbs impurities from the weld metal. It also helps
shape the weld bead and becomes an
insulating blanket over the weld bead. Mild
Steel - An
alloy of mostly iron with low content of alloying elements such as carbon
and manganese.
Low
Alloy Steel
- An alloy of iron
with alloy additions, usually in the range of 1½ to 5%.
Hardenable
Steel
- An alloy of iron
that is subject to hardening when rapidly cooled. Deposition
Rate
- The weight of weld
metal deposited compared to the time of welding. It is
usually expressed in pounds per hour.
Deposition
Efficiency
- The relationship
of the electrode used to the amount of the weld metal de-
posited, expressed in percent, i.e.;
DE = Weight of Weld Metal ÷
Weight of Electrode Used Arc
Blow - Welding
with direct current may set up a magnetic field in the steel plate
being welded. This magnetic field
causes the arc to flutter and blow, creating difficulty
in controlling the arc. Cellulose
- A chemical of carbon,
hydrogen and oxygen. As used in mild steel electrode
coatings, it consists of wood pulp
or flour.
