Principles governing the choice of electrode

Principles governing the choice of electrode


The amount and type of electrode, the weld must be at least equal to the base metal .

Apart from the electrodes, carbon electrodes, hard cover should be less than 0.15% by weight .

For metals with a high of 0.35% carbon electrodes in alkaline 're only allowed to use .

For thicknesses up to speed and reduce residual stresses from welding electrodes used Bajaygzyny above .



Steel
- % Of alloying elements = 0 (plain carbon - plain carbon steel
- % Of alloying elements ≥ 1 ( micro alloy - steel micro alloy

1 ≥ percentage of alloying elements ≥ 5 ( Low Alloy - low alloy steel

5 ≥ percentage of alloying elements ≥ 50 ( high-alloy - high alloy steel

Of plain carbon steel
% C ≥ 0.1% ( low C - low carbon steel

0.1 ≥ % C ≥ 0.3 ( Software ( carbon ) - steel mild

0.3 ≥ % C ≥ 0.6 ( C average - medium carbon steel

0.6 ≥ % C ≥ 1.7 ( high carbon - high carbon steel







The following table is displayed for you to select from the standard electrode



Effects of major alloying elements in steel

Mn : the strength - toughness creation - remove the harmful effects of sulfur

CR : Increased resistance to oxidation and corrosion - the strength of the

Mo: creep strength - toughness creation

Nickel : creation, especially in low temperature toughness - resistance to corrosion

Vanadium : toughness creation

On the chemical composition of the electrodes in the following table:




Building a low-carbon steels

These steels are the most important group

ST 37 - ST44-ST12-CK10-CK20

Electrode suitable for thicknesses less than 1 inch

E60XX

And the top 1 inch thick series

E70XX

Medium carbon steels

These are load -carrying steel products . Most famous of these metals

CK35, CK45

To compensate for reduced carbon welding electrodes most appropriate group

In some cases, subsequent use Mybashdv E80XX E70XX

Tattoos are also better for the effervesce or nickel austenitic stainless electrodes can be used as

ENiFe-C1, E308, E309

Steel Prkrbn

These steels are resistant to wear and are the most popular codes

CK60-CK75, CK100

To compensate for reduced carbon electrode Best Group Azalktrvdha

E100XX-D

Manganese Steels

Strength and high toughness steel where it is considered an alternative to simple carbon steels . The most famous of these steels are:

30Mn5-40Mn4-ST52-A515-A516

The best electrode for welding

E70XX-C, E70XX

Nickel-bearing steels

These steels are suitable for use at low temperatures most of this code are

A353-A553-2120-2320

Stainless Cr - Ni - Mo

This steel high strength and toughness are required when they are used . The most famous of these codes are

4340,4330, VCN150, VCN200

These alloys are suitable for welding electrodes