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Terms used in the Metals Industry

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Term Definition
As-Extruded

A condition of a metal mill product resulting from hot extrusion; soft, not cleaned nor drawn or rolled to size.

As-Hot-Rolled

A condition of a metal mill product resulting from hot rolling; soft, not cleaned nor drawn or rolled to size.

ASTM

Abbreviation for the American Society for Testing Material.

Beryllium copper

Copper Alloys C17200, C17300, C17500, and C17510

Beryllium copper, also known as copper beryllium, CuBe or beryllium bronze, is a metal alloy of copper and 0.5 to 3% beryllium, and sometimes with other alloying elements, and has significant metalworking and operating performance qualities.

 

Chemical Composition for C17200


Cu Al Be Co Si
Min./Max. Rem. .20 1.80-2.00 .20 min .20
Nominal 98.1 - 1.90 - -

 

Chemical Composition for C17300


Cu Al Be Co Pb Si
Min./Max. Rem. .20 1.80-2.00 .20 min .20-.6 .20
Nominal 97.7 - 1.90 - .40 -

 

Chemical Composition for C17500


Cu Al Be Co Fe Si
Min./Max. Rem. .20 .4-.7 2.4-2.7 .10 .20
Nominal 96.9 - .55 2.6 - -

 

Chemical Composition for C17510


Cu Al Be Co Fe Ni Si
Min./Max. Rem. .20 .2-.6 .3 .10 1.4-2.2 .20
Nominal 97.8 - .4 - - 1.8 -

Billet

A hot-worked semifinished product suitable for subsequent working by such methods as rolling, forging, extruding, etc.

Blank

A piece from any wrought product intended for subsequent fabrication by such operations as forming, bending, cupping, drawing, hot pressing.

Blanking

The process of cutting metal blanks by a die and punch set in a press, or by sawing or shearing.

Blister

A raised spot on the surface of the metal caused by expansion of gas in subsurface zone during thermal treatment.

Block Marks

Short longitudinal scratches introduced during rewinding of sheet or foil, resulting from relative movement between adjacent wraps of the coil.

Bloom

A semifinished hot rolled product, rectangular or square in cross section produced on a blooming mill.

BMS

A prefix for Boeing's material specifications.

Ex: BMS-7-28 equals E- 4340 MOD V.M., E-4340 N&T

Bottom Draft

Taper or slope in the bottom of a forged depression to assist the flow of metal toward the sides of the depressed area.

Bow

Longitudinal curvature of rod, bar, shapes, and tube.

Brass

Any copper alloy with zinc as the principal alloying element, with or without small quantities of some other elements.

Brazing

A joining process wherein coalescence is produced by heating to suitable temperatures above 800 F. and by using a non-ferrous filler metal having a melting point below that of the base metals. The filler metal is distributed between the closely fitted surfaces of the joint by capillary attraction.

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