Welding Rods

There are many types of welding rods and we supply TIG rods, MMA (Stick) electrodes and oxy/fuel gas brazing rods at the best prices on the net.

What kind of welding rods are you looking for?

TIG Welding Rods
TIG Welding Rods
MMA (Stick) Electrodes
MMA (Stick) Electrodes
Oxy/Fuel Gas Rods - Brazing
Oxy/Fuel Gas Rods - Brazing


Whilst there are many types of "welding rods" it is first necessary to understand the welding processes involved so that these can be related to the welding materials which fall under this heading.

There are 3 common processes for the deposition of welding rods:-

1. MMA (Stick) Electrodes

2. TIG Welding Rods

3. Oxy/Fuel Gas Rods - Brazing

Manual Metal Arc Welding [MMA]

In MMA the welding rods are more commonly called electrodes. An electric arc is formed when an electric arc passes between two electrodes separated by a short distance from each other. In MMA welding the electrodes is connected to the positive + pole and the material to be welded [now called the base plate] to the negative [please note that this polarity may be changed based on the welding electrode manufacturer's recommendations. This will be dealt with additional technical information, on this site, in the future].The arc is started by momentarily touching electrode onto the base plate and then withdrawing it to about 3mm from the plate. When the electrode touches the plate a current flows, and as it is withdrawn the current continues to flow in the form of a "spark" across the gap first formed. This causes the air gap to become ionized, or made conductive, and as a result the current is able to flow across the gap, in the form of an arc. The electrode must always be touched down, or scratched on the plate before the arc can be started, since the smallest air gap will not conduct a current unless it is first ionized.

If a bare wire is used as an electrode it is found that the arc is difficult to control and the arc stream will wander over the molten pool formed in the base material. The metal globules projected across the arc [ionized] gap are exposed to the atmosphere and the absorption of oxygen and nitrogen takes place, even when a short arc is held.

The arc can be rendered easy to control and the absorption of atmospheric gases reduced to a minimum by "shielding" the arc. This can be done by extruding a coating onto the electrode and as a result gases, such as hydrogen and carbon dioxide are released from the coating as it burns down in conjunction with the melt rate of the rod[core wire]. This forms a covering around the arc and molten pool, thus excluding the detrimental effects from the atmosphere. Under the heat of the arc chemical compounds in the electrode covering also react to form a slag which in its liquid form is lighter than the molten metal. This rises to the surface, cools and solidifies, forming a protective cover of the welded joint, as it solidifies and also slow down the cooling rate. Some slags are self releasing whilst others my need to be lightly chipped with a welders chipping hammer.

The electrode coating normally melts at a slightly slower rate than the core wire so that it extends a little beyond the core, concentrating and directing the arc stream, making the arc stable and easier to control.

When an arc is struck between the metal and the plate, the heat generated forms a molten pool in the plate and at the same time the electrode begins to melt, this metal being transferred from the metal to the plate.

Which Electrode?

Welding electrodes are selected based on their compatibility with the base materials and the more common ones are listed below:-


A] Mild and Low Alloys Steels

AWS A5.1: E6013
EN.ISO 2560:E 42 0 RR 12**

Normally a general purpose mild steel electrode for joints in base materials of similar composition, having Tensile strengths of around 450 – 520 N/mm2.

These can be for down hand [flat] welding or for all positional welding of mild steel, in the vertical and horizontal positions.

AWS A5.1: E7018-1
EN.ISO 2560: E 46 4B 32 H5

These are known as Low Hydrogen, or Hydrogen controlled electrodes and are normally used in steel construction, where components are subject to higher degrees of stress and as such would have a Tensile strength in the range of
530 – 580 N/mm2

AWS A5.1: E7024
EN.ISO 2560: E 42 0 RR 53

Classed as a "High recovery" electrode based on the fact that this type of mild Steel electrode is highly efficient in that by incorporating metal powder in the electrode coating it will deposit weld metal equivalent to up to 160% of the electrode core wire weight. This electrode is very popular in fabrication shops for rapid welding of sheet steel.

** Electrode Classification [British]
Abridged classification to cover carbon and carbon manganese steel electrodes for manual arc welding. BS639 [1986]

This classification is for deposited weld metal having a tensile strength not greater than 650N/mm2. The classification is noted by a code consisting of 2 parts: [a] a general code, followed by [b] an additional code in parentheses, for example E 43 2 2 RR [21]

[a] General Code

  • [1] The letter E indicating a covered electrode for manual arc welding
  • [2] Two digits indicating the strength [Tensile, yield and elongation properties]
    Of the base material.
  • [3] One digit for a minimum average impact value of 28 Jules.
  • [4] One indicating the temperature for a minimum average value of 47 Jules.
  • [5] Either one, or two letters indicating the type of electrode coating e.g.
    B – basic; BB – basic, high efficiency; C – cellulosic; R – rutile etc

 

[b] Additional Code

A digit recommended welding positions for the electrode.

  • 1 – all positions
  • 2 – all positions except vertical down
  • 3 – flat an for fillet welds
  • 4 – flat
  • 5 – flat, vertical down and for fillet welds
  • 9 – any other positions not classified above.

Also a letter H, indicating a hydrogen controlled electrode.

 

B] Stainless Steels

AWS A5.4 E308L-17
E 19 9 LR 32

For the welding of stainless steels such as Types 304L, 321 & 347. This alloy has maximum carbon content of 0.03% which increases the resistance to intergranular corrosion.

AWS A 5.4 E316L-17
E 19 12 3 LR 12

Used primarily for welding molybdenum bearing low carbon austenitic alloys. Also available as ER316H for elevated temperatures.

AWS A5.4 E307-16 [mod]
E 18.8.Mn LR53

For the joining and overlaying of alloy steels and can also be used as a buffer layer prior to the depositing of a wear resistant [hard facing] coating.

AWS A 5.4 E309-17
E 23.12 LR32

For the welding of corrosion and heat resistant stainless steels. The low carbon content [0.03% maximum] increases resistance to inter granular corrosion. 309L superior to 309 for the cladding of carbon or low alloy steels.

AWS A 5.4 E310-16
E 25.20. LR26

For joining heat resisting stainless steels up to an operating temperature of 1200'C. High oxidation resistance and strength at elevated temperatures.

 

C] Cast Iron

AWS E Ni-BG11
DIN 8573 E Ni-BG11

High nickel content electrode for the welding of grey, malleable and cast irons. Suitable for contaminated cast iron components, such as cylinder blocks, pump housings and electric motor casings.

AWS E Ni Fe -1-BG11
DIN 8573 E Ni Fe – C1

A nickel iron electrode for repairs to nodular, spheroidal graphite and malleable cast iron components. Suitable for joining cast iron to steel and where an oil tight joint is required.

 

D] Metal Working

CUTTING ELECRODES

Cutting electrodes have a special flux coating which produces a forceful non metal depositing arc. This will cut, or pierce, all ferrous and non ferrous materials.

GOUGING ELECTRODES

Use for grooving, gouging or otherwise preparing metal prior to welding. This electrode is particularly suitable for sealing the oil contaminated surface of cast iron components before depositing either a Nickel, or Nickel Iron welding material.

 

E] Wear facing [Hard facing]

Use for protection from components subject to wear whilst in service, from abrasion, impact and other medium. The alloys fall into three common groups.

  • E1] High carbon
  • E2] Complex carbides
  • E3] Tungsten carbides

E1] For wear facing components subject to both impact and abrasion with a hardness of up to 57RC being achieved after 3 passes. Applications include coatings on steels, cast steels and manganese steels, such as crusher rings, earth moving plant and screw conveyors.

E2] Depending on the complexity and percentages of carbides such as chromium and tungsten in these alloys a hardness of up to 70RC can be achieved. Whilst some of these alloys can be used for resistance to impact and abrasion the upper hardness values are for resistance to abrasion with minor impact. Applications include: wear resistant coatings on crusher hammers, bucket lips, chutes, liners and screw conveyors

E3] Consisting of up to 70% Tungsten carbides in a complex carbide matrix, with an approximate hardness of 70RC. This is the hardest of the more popular wear resisting coatings and is used in applications where extreme abrasion is experienced. Applications include mixer paddles, sinter fan, mineral drilling tools, ceramic and glass process plant.

 

F] Aluminium

DIN 1732 EL-Al Si 12
AWS A 5.3 E 4047

Whilst there are a number of alloys suitable for joining aluminium and most of its weldable alloys the most common and successful is the aluminium, 12% silicon alloy. Applications include: engine casings, sumps, aluminium framework etc.

DIN 1732 EL-Al 99.8

Coated electrode, 99.8% pure aluminium, for welding pure and cast aluminium alloys.

DIN 1732 EL-Al Si 5
AWS A 5.3 E4043

Coated electrode containing 5% silicon, for the welding of wrought and cast aluminium alloys.

 

G] Bronzes

AWS A 5.6 E Cu Al-A2
DIN 1733 EL-Cu A19

For the joining of aluminium bronzes with an aluminium content of up to 10%

AWS A 5.6 E Cu Sn-C
DIN 1733 EL-Cu Sn 7

A tin bonze alloy for repair and reclamation of tin and phosphor bronzes.

AWS A 5.6 E Cu Mn Ni Al
DIN 1733 EL-Cu Mn 14 Al

For joining and wear surfacing of brass, bronze and cast steel. This alloy has a low coefficient of friction which makes it an ideal alloy for sliding surfaces.

 

H] Copper

AWS A 5.6 E Cu
DIN 1733 EL-Cu Mn 2

A 97% copper electrode for the joining and coating of copper and copper alloys.

We accept

Welding

Cutting

Manifolds

Pipe Purging & Preparation

Welding PPE

Fume Extraction

Welding Tools, Pipe Stands & Mis

Hand Tools

Air Tools & Compressors

Sawing/Drilling & Abrasives

Welding Safety Equipment

New to Welding?




Welding & WelderWelding Packages
Go to checkout 0 items - £0.00

»Home »MIG Welding »TIG Welding »Stick/Plasma Cutting »Welding Rods »MIG Wire
»Returns & Cancellations »Terms & Conditions »Help »Contact Us
Welding & Welder is a trading name of Welding Equipment Online Ltd. Company No. 07450977.
Registered office: 14 & 15 Scott Building, Tamar Science Park, Plymouth, PL6 8BX

website design devon