Adding carbon to the surface of steel by heating it in contact with carbon rich gases.
The surface layer of a steel whose composition has been changed by the addition of carbon, nitrogen, or other material at high temperature.
A heat treatment in which the surface layer of a steel is made substantially harder than the interior by altering its composition.
Negatively charged electrode.
Slotted cardboard sheets designed to be interleaved in a master carton producing individual pockets to separate parts.
The point which is defined midway between the extents of a hole in both the X and Y directions.
Drafting practice which dimensions repetitive features from each other rather than a common datum.
Surface ripples and cracks induced by forming.
Removal of metal through chemical erosion process.
Post-treatment wash non electrolytic coating which is used over zinc, cadmium, treated aluminum and other plating operations to seal the surface of the coating, prevent oxidation and, in certain cases, improve the electrical characteristics of the coating.
Application of a salt or ester of chromic acid to a metal workpiece by dipping or spraying. The coating is generally used to seal the surface of the workpiece to enhance electrical properties or reduce corrosion.
A continuous arc starting and ending at the same point.
A rollformed shape made up of two materials simultaneously fed into the roll forming mill to produce a composite section.
Slight indentations at the edge of one side of stock caused by pressure from turret press holding devices. See also Work-holder Mark.
See Inserted Fastener.
Alloy steel available in a pre-hardened condition between RC 45 and 52.
Industry acronym for Computer Numerical Control.
CNC Turret Press
Automatic punch press indexing the material and selecting the intended tool out of the rotary tool holding device turret totally by computer control for piercing, blanking and forming workpieces as programmed.
Paint, varnish or lacquer applied to a surface in a single application one layer to form a properly distributed film when dry.
Consists of a number of coats separately applied in a predetermined order at suitable intervals to allow for drying or curing.
Process in which the customer and the supplier review and modify a design to simplify manufacturability of a part.
Coil Breaks Crossbreak
Defective condition of ridges or marks across the width of sheet or coil caused by improper coiling or leveling.
Compressive metal flowing action. See also, Bottoming.
Cold Rolled Steel
Steel which was reduced to final thickness in the cold state by a rolling mill. Creates a smooth surface with slight skin hardness.
Defective weld due to improper contact or inadequate heat during welding.
Material hardened naturally through forming at ambient temperatures.
Plastic deformation of a metal at a temperature low enough so that recrystallization does not occur during cooling.
Collapsible Tool Segmented
A mold having a removable center core which keeps the perimeter pieces in place during spinning.
One aspect of appearance; a stimulus based on visual response to light, and consisting of the three dimensions of hue, saturation, and lightness.
Pair of colors exhibiting no perceptible difference when observed under specified conditions.
Standard materials commonly available through supply houses.
A computer program that enables one computer to connect with another computer.
Tool used to pierce, form and blank a part at the same time, with one stroke of the press.
To condense electronic files for ease of transfer and storage.
Concealed Head Fastener
Fastener installed in a blind hole.
Dimensional relationship of two or more items sharing a common center line.
Perceived identity of color exhibited by a pair of colors, each with different spectral distribution curves.
Organic coating that conducts electrical current.
Ability of a material to conduct electricity or heat.
Two lines on a part drawing tangent.
A roll formed shape with a continuous curve or sweep in one or more planes.
Power output mode of lasers using a constant discharge.
The art of forming metal over a mold using multiple passes and hand pressure.
Treatment, either chemical or electrochemical, of the metal surface to convert it to another chemical form. It provides greater corrosion resistance to the metal and increased adhesion of coatings applied to the metal.
Having all elements, features, dimensions or functions existing in one geometric plane.
The interior part of a steel whose composition has not been changed in a case hardening operation.
Hole diameter required before cutting or forming internal threads.
Three surfaces meeting at one point.
The ability of a substance to resist deterioration due to a reaction with its environment.
Machining or coining operation to generate a cylindrical flatbottomed hole.
Machining or coining operation to generate a conical angle on a hole.
Critical-to-Function CTF Dimensions
In the absence of dimensional drawings, a means of communicating by CAD dimensions critical to success of the design, tolerance and other non-geometrical information. Generally, simpler than a complete fabrication drawing because of fewer dimensions.
Repetitive lines crossing each other at an angle, such as a coarsely woven cloth.
Arrangement of molecules in geometric patterns in a solidified material.
Progressive accumulation of tolerances resulting from multiple operations or assembly of multiple parts.
The tendency for steel strip to retain some of the coil set of the wound coil when it is uncoiled. Also called coil set.
Standard sheet sizes of material received from service centers, such as 3' x 8' or 4' x 12'.
Process by which strips of material or finished parts are cut from a coil or strip of raw material.
Any one of several types of cutoff methods in a rollforming line.
A paint adhesion test consisting of the application of an adhesive tape to a dried coating and rapidly removing the tape with a swift, jerking motion.