Usually refers to a temporary weld used to hold parts in place while more extensive, final welds are made. In some sheet metal applications, tack welds may provide sufficient strength to eliminate the need for an all-around fillet weld.
A flexible plastic wound strip coated with magnetic oxide and used for storing electronic data.
Tape Adhesion Test
Conducted by cross hatching the painted surface with a sharp knife in a 1/8 in. grid pattern, applying tape, allowing to sit for a specified period, and then removing with a quick pull perpendicular to the surface of the part.
Reheating quenched steel to a temperature below the critical range, followed by any desired rate of cooling. Tempering is done to relieve quenching stresses, or to develop desired strength characteristics.