Dear Readers,
This is continuation of Part-4. This article will be a valuable resource for anyone looking to enhance their knowledge of the Welding Works.
Impact Test – A test in which one or more blows are suddenly applied to a specimen. The results are usually expressed in terms of energy absorbed or number of blows of a given intensity required to break the specimen.
Inclined Position – In pipe welding, the pipe axis angles 45 degrees to the horizontal position and remains stationary.
Incomplete Fusion – A weld discontinuity where fusion did not occur between weld metal and the joint or adjoining weld beads.
Incomplete Joint Penetration – A condition in a groove weld where weld metal does not extend through the joint thickness.
Indentation – In a spot, seam, or projection weld, the depression on the exterior surface or surfaces of the base metal.
Induction heating – Induction heating is the process of heating an electrically conducting object (usually a metal) by electromagnetic induction, through heat generated in the object by eddy currents.
Induction Welding – A process in which fusion is produced by heat obtained from resistance of the work to the flow of induced electric current, with or without the application of pressure.
Inert Gas – A gas that normally does not combine chemically with the base metal or filler metal.
Infrared radiation – Electromagnetic energy with wavelengths from 770 to 12000 nanometers.
Intergranular Penetration – The penetration of filler metal along the grain boundaries of a base metal.
Intermetallic – A term used to describe a compound material composed of two or more metals or of a metal and a nonmetal.
Intermittent Weld – An intermittent weld, also called a skip weld, consists of a series of welds placed on a joint, with unwelded spaces between each of the welds.
Inter-pass Temperature – In a multi-pass weld, the temperature of the weld area between passes.
Inverter – A power source for welding machines that is much more efficient than the normal transformers.
Ionization Potential – The voltage required to ionize (add or remove an electron) a material.
ITP – Inspection Test Plan. (Similar to FQP). It's a plan that lists what tests and inspections should be performed throughout each phase of a project.
Jig – Jigs hold the metal or steel you are working on in place as you are fabricating. They can be steel clamped with a vice or C-clamp, bolts tack-welded to a table, or very elaborate frames.
Joined buildup sequence – The order in which the weld beads of a multiple-pass weld are deposited with respect to the cross section of the joint.
Joint design – The joint geometry together with the required dimensions of the welded joint.
Joint efficiency – The ratio of the strength of a joint to the strength of the base metal (expressed in percent).
Joint geometry – The shape and dimensions of a joint in cross section prior to welding.
Joint penetration – The minimum depth a groove or flange weld extends from its face into a joint, exclusive of reinforcement. Joint penetration may include root penetration.
Joint welding procedure – The materials, detailed methods and practices employed in the welding of a particular joint.
Kerf – The width of the cut produced during a cutting process.
Kilogram (kg) – The kilogram or kilogramme (SI unit symbol: kg) is the base unit of mass in the International System of Units (SI).
kW (Kilowatts) – A kilowatt is simply 1,000 watts, which is a measure of power. Primary kW is the actual power used by a power source when it is producing its rated output. Secondary kW is the actual power output of a welding power source.
