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MISCELLANEOUS INFORMATION

AWS Abbreviation for American Welding Society.

BACKUP BAR

Tool or fixture attached to the root of weld joint. Tool may or may not control the shape of the penetrating metal.

BACKUP GAS Shielding gas which protects the root of the weld from the atmosphere.

BASE MATERIAL

The material in components to be joined by welding. The composition and dimension of the base materials are the deciding factors for the welding process and filler material to be used.

BASIC COATING

Electrode coating consisting of calcite, fluorspar, ferromanganese and ferrosilicium.

BERYLLIUM Hard, light metallic element used in copper for better fatigue endurance.

BEVEL

Angular type of edge preparation.

BOILER STEEL Better known as heat resistant construction steel. Weldable and corrosion resistant steel with satisfactory resistance under high thermic conditions, approx. 500–700°C. This type of steel may be unalloyed, low alloyed or stainless.

BORE

Inside diameter of hole, tube or hollow object.

BRAZING

The method where surface bonding between the base material and filler metal is achieved.

BRIGHT METAL

Material preparation where the surface has been ground or machined to a bright surface to remove scale or oxides.

BRINELL HARDNESS

Abbreviated HB, denoting load in kp from a hard steel ball divided by the spherical area of indentation in mm2. Expressed in kp mm2.

BS Abbreviation for British Standard.

BURNTHROUGH

Weld which has melted through, resulting in a ho!e and excessive penetration.

BV Abbreviation for Bureau Veritas (French classification institute).

CADMIUM

White ductile metallic element used for plating material to prevent corrosion.

CAPILLARY BRAZING Method of brazing using the capillary forces to draw the filler metal into narrow gaps. Max. gap for capillary brazing is 0.1 mm.

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