Acrylic paintFast-drying paint containing pigment suspension in acrylic polymer emulsion. Can be diluted with water but becomes water-resistant when dry.
Alloy steelAn iron-based mixture is considered to be an alloy steel when manganese is greater than 1.65 percent, silicon over 0.5 percent, copper above 0.6 percent or other minimum quantity of alloying elements such as chromium, nickel, manganese, molybdenum or tungsten. An enormous variety of distinct properties can be created for the steel by substituting these elements in the recipe.
AnnealingA heat or thermal treatment process by which a previously cold-rolled steel coil is made more suitable for forming and bending. The steel sheet is heated to a designated temperature for a sufficient amount of time and then cooled.
BurrA deformation, such as a thin ridge or raised sharp edge, of forgings or sheet metal blanks that have been machined. Caused by cutting operations such as slitting, shearing, trimming, punching, blanking or sawing.
CoilSteel sheet that has been wound. A slab, once rolled in a hot-strip mill, is more than one-quarter mile long. Coils are the most efficient way to store and transport sheet steel.
Cold rolled steel strip and sheetProduced, as the term suggests, by the further rolling of strip produced by the hot strip mills. Prior to cold rolling, the mill scale has to be removed, normally by the pickling process, which uses mechanical manipulation (around small diameter rolls) and acid to dissolve the surface scale. The surface is then washed to remove the acid, and a light oil is added to prevent rusting.
DeburringA finishing method used in industrial settings and manufacturing environments to remove burrs from a piece of metal.
Electrical steelCold rolled strip containing up to 6 percent Si and cold rolled and annealed to give specific magnetic properties and high electrical resistivity. Can be grain-oriented (GO) to give preferred magnetic properties in the rolled direction or non-grain oriented (NGO) to give uniform properties. The strips or laminations are usually lacquer coated to increase electrical resistivity when assembled into cores for transformers, electric motors, etc.
ElectrogalvanizedPlating process whereby the molecules on the positively charged zinc anode attach to the negatively charged sheet steel. The thickness of the zinc coating is readily controlled. By increasing the electric charge or slowing the speed of the steel through the plating area, the coating will thicken.
ElectroplatingA plating process in which metal ions in a solution are moved by an electric field to coat an electrode. The process uses electrical current to reduce cations of a desired material from a solution and coat a conductive object with a thin layer of the material, such as a metal. Electroplating is primarily used for depositing a layer of material to bestow a desired property (e.g., abrasion and wear resistance, corrosion protection, lubricity, aesthetic qualities, etc.) to a surface that otherwise lacks that property.
EpoxyA thermosetting polymer formed from reaction of an epoxide resin with polyamine hardener. Also known as polyepoxide.
Epoxy paintPaint with resin added, which enables it to bond better to surfaces.
Galvalume®A 55-percent aluminum-zinc coated sheet steel product that is ideally suited for most types of roofing and siding applications as well as unexposed automotive parts, appliances and miscellaneous applications like furniture, outdoor cabinetry, computer cases, gutters, pipe, etc.
GalvannealedAlso called galvanneal. The result from the combined process of galvanizing and annealing to produce specialized sheets of steel. The galvanization is made through the hot-dipping (see also Hot-dip galvanizing) process and gives a very fine grayish matte finish. Galvanneal does not flake off its galvanized coating when formed, stamped and bent. The very fine matte finish acts like a primer, allowing paint to adhere easily, and is very rust proof; only white to dark gray marks appear if it comes in contact with water. Galvanneal sheets offer good paintability, weldability, corrosion resistance and formability. It is extensively used in the automotive, signage, electric equipment and other industries requiring a metal with good paintability and long reliable service life.
GaugeAnother term for the thickness of sheet metal.
High carbon steelSteel with more than 0.3 percent carbon. The more carbon that is dissolved in the iron, the less formable and the tougher the steel becomes. High carbon steel's hardness makes it suitable for plow blades, shovels, cutting edges or other high-wear applications.
Hot dip galvanizingA form of galvanization. The process of coating iron, steel or aluminum with a thin zinc layer by passing the metal through a molten bath of zinc at a temperature of around 860 °F (460 °C). When exposed to the atmosphere, the pure zinc (Zn) reacts with oxygen (O2) to form zinc oxide (ZnO), which further reacts with carbon dioxide (CO2) to form zinc carbonate (ZnCO3), a usually dull grey, fairly strong material that stops further corrosion in many circumstances, protecting the steel below from the elements. Galvanized steel is widely used in applications where rust resistance is needed and can be identified by the crystallization patterning on the surface (often called a spangle).
ISO certificationA company is ISO certified when their products and services complies with international standards set forth by the International Organization for Standardization (ISO).
Light gauge steelVery thin steel sheet that has been temper-rolled or passed through a cold-reduction mill. Light gauge steel normally is plated with tin or chrome for use in food containers.
Low carbon steelSteel with less than 0.005 percent carbon is more ductile (malleable). It is capable of being drawn out or rolled thin for use in automotive body applications. Carbon is removed from the steel bath through vacuum degassing.
Oscillate slitA narrow cut of continuous steel strip.
Oscillated prime coilsPrime coils of steel with 20 to 25 miles of strip that are continuous, connected by welding and if needed, annealed and ground to gauge. Allows manufacturers to run a coil uninterrupted for 10 to 15 times longer than with the conventional ribbon-wound. This can eliminate downtime and coil end scrap loss.
PlateSheet steel with a width of more than eight inches, with a thickness ranging from one quarter of an inch to more than one foot.
Prepainted steel coilCoiled steel that is coated by paint, laminate or powder to provide protective and/or decorative measures. Liquid paints such as primers, finishes, polyesters, polyurethanes, etc., powder coatings and laminate films are applied to the steel in one continuous process: the coil of steel is unwound, cleaned, chemically treated, primed, oven cured, top coated, oven cured again, rewound and packaged for shipment.
SlittingA shearing operation that cuts a large roll of material into narrower rolls.
Stainless steelAll grades of steel containing more than 10 percent chromium, with or without other alloying elements. Resists corrosion and is used widely in items such as automotive and food processing products, as well as medical and health equipment.
Stock reelA device used to hold a coil of material as it is fed into a machine.
StripThin, flat steel that resembles hot-rolled sheet, but it is normally narrower (up to 12 inches wide) and produced to more closely controlled thicknesses. Strip also may be cut from steel sheet by a slitting machine.
VinylA polymer used in protective coatings for metal. Has excellent electrical resistance, corrosion resistance, noise reducing characteristics and UV resistance.
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