A die, commonly used in press-brake forming, that is machined horizontally with a square or rectangular crosssectional opening that provides two edges over which metal is drawn into a channel shape.
Source: The OHIO State University
U
Ultimate strength
The maximum stress (tensile, compressive, or shear) a material can sustain without fracture; determined by dividing maximum load by the original cross-sectional area of the specimen. Also known as nominal strength or maximum strength.
Source: The OHIO State University
Ultrasonic gage
“A parameter measured in a tensile test used as a measure of ductility defined by: Final Gauge Length-Original Gauge Length x 100 Original Gauge Length” (Automotive Steel Partnership, 1991, p. 17).
Source: The OHIO State University
Undercrown
The term used to signify that the surface does not have enough height to the curvature.
Source: The OHIO State University
Undercut
See relief.
Source: The OHIO State University
Underdrive press
A press in which the driving mechanism is located within or under the press bed or below the floor line.
Source: The OHIO State University