Designation for Soft Bare Copper.

Designation for Synthetic Butyl Rubber. A copolymer of styrene and butadiene, it is a commonly used type of synthetic rubber.

Designation for flexible stage lighting power cable rated for extra hard usage, 600 volts. One or more (8 AWG to 250 kcmil) conductors with thermoset insulation and thermoset jacket. The required outer covering on some single conductor cables may be integral with the jacket.

An alternative designation for aluminum conductor, steel reinforced.

Small blemishes on the surface of rolled rods or drawn wire. Often the result of splashing of the molten metal on the mold wall during teeming, they are also caused on castings by eruption of gas from the mold face, or by uneven mold surfaces; or occurring where the skin from a blowhole has partly burned away and is not welded.

A rotating horizontal cast-iron disc that uses diamond powder and a lubricant to flatten diamonds to be made into drawing dies and polishing windows on them.

A surface coating on rod or wire that is comprised of oxidized base metal. Three iron oxides are present: ferrous oxide, magnetite and ferric oxide, formed on the rod or wire in that order. Generally oxides are formed during heating, lengthy exposure to certain atmospheric condition or manufacturing processes such as rolling, drawing, forming, heat-treating and storing. There are many mixtures of these oxides that form on the surface of steel at different temperatures and give the steel different colors, such as yellow, brown, purple, blue and red. Oxides must be thoroughly removed from the surface of steel objects that are to be coated with tin, zinc or other metals. 2) In the copper industry, cuprous and cupric oxides are prevalent in the manufacturing processes. The rate of cooling has a great influence on the thickness and structure of scale. Being abrasive in nature, the oxide must be removed from the surface prior to further processing. See Descaling and Pickling.

A billet that has been prepared for extrusion or rolling by removing the surface oxides and establishing a given profile.

Machining away the surface on the main faces of a billet to remove faults that would give rise to unsatisfactory products in the final stages of rolling and drawing. See Scarfing.

Removing surface areas of blooms, billets and similar objects by burning, mainly by using an oxyfuel gas torch, to remove faults that would create unsatisfactory products in the final stages of rolling and drawing. The term is usually associated with ferrous rod production and is similar to scalping in nonferrous production.

Same as SC, but with thermoplastic elastomer insulation.

See Bridge.

See Shore Hardness.

Marring or scratching of a smooth surface. Most often caused by sliding contact with a mating member that has a hard projection or embedded particle on its surface.

1) Southwire Continuous Rod. A registered trademark of Southwire Company. 2) Squirrel-cage rotor. 3) Short-circuit rotor. 4) Silicon-controlled rectifiers.

See Spring, Presetting.

1) Junk metal that can be reproces­sed. 2) Defective product not suitable for sale.

The act of discarding a piece of metal or cutting it into sizes convenient for handling as scrap.

A mark on the surface of the product produced by scratching (a common source is foreign matter trapped in a drawing die). Such marks are generally rough to the touch.

The finish obtained by mechanically brushing the surface with wire bristle brushes or by buffing with compound.