Bedienungsanleitung Elektra Beckum MIG 160 (Seite 7 von 14) (Englisch)

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Stick electrodes can be classified according to their coating as under:

Type Code

Type

Coating

Characteristics

Type of Slag

Slag Removal Ability

Penetration Depth

Gap Bridging Ability

Weld AppearanceCharacteristicsElectrode Manipula-

tion

Bare Electrode

finely distributed arc

stabilizers in the

electrode material

minimal slag shallow

excellent

more difficult to weld

than any other stick

electrode

very high deposition

rate, minimal heat

stress, little heat

distortion

convex, coarsely

rippled

Flux-Core Electrode

arc stabilizers rolled

into the electrode's

core

minimal slag average to deep

excellent

slightly easier to

weld than bare

electrodes

good deposition

rate, minimal heat

stress, little weld

distorition,

especially for root

welds

convex

coarsely rippled

Titania Oxide Type

high contens of

titanium oxide

porous, even slag

blanket

easily removed

average

good to excellent,

depending on

coating thickness

weldability of fillet

welds improves with

increasing coating

thickness

general purpose

electrodes, for

steels sensitive to

welding conditions,

for thin plate

slightly convex to

flat, finely to

medium-coarsely

rippled

flat, finely rippledEs

Acid-Coated Type

high contents of

heavy metal oxides

porous, even slag

blanket

deep

average

weldability of fillet

welds improves with

increasing coating

thickness

for steels sensitive

to welding

conditions, requires

good weld

preparation

Iron Oxide Type

high contents of iron

oxides

tight slag blanket of

evenly distributed

thickness

very easily

shallow

very poor

good weldability,

fillet welds in gravity

position only

for unalloyed low-

carbon steels,

requires good weld

preparation

concave, very finely

rippled

Basic Low-

Hydrogen Type

high contents of

calcium or other

alkaline carbonates

thick slag blanket

fair

medium

good

handling requires

some practice, in

particular when

setting electrode to

and removing from

weld

particularly suitable

for thick plate and

rigid assemblies, for

high-carbon steels,

for thermo steels

slightly convex,

medium-coarsely

rippled

Cellulose Type

high contents of

organic components

minimal, often

quickly solidifying

thin slag blanket

easy

deep

very good

good handling as

only minimal slag,

heavy fume

generation

for out-of-position

welding

slightly convex,

rippled

In addition to the electrodes types shown in the above table there are several special types available coded SO. Cast

iron electrodes, for example, fall into this class.

When buying Kb and So type electrodes make sure they are suitable for AC current. As far as the quality grades are

concerned, a higher number indicates a better grade quality. For common low-carbon steels grades 7 - 9 are best

suitable.

The last letter of the code shown on the stick electrode indicates the coating thickness.

d = light coating

m = medium coating

s = heavy coating

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