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Welding Elotrode

The document discusses welding consumables, which include filler wires, covered electrodes, shielding gases, and fluxes used in various welding processes. It provides classifications and standards for consumables for processes such as shielded metal arc welding (SMAW), gas metal arc welding (GMAW), gas tungsten arc welding (GTAW), and submerged arc welding (SAW). Key details covered include the composition and purpose of covered electrode coatings as well as flux types and their functions in arc welding.

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Niranjan khatua
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200 views3 pages

Welding Elotrode

The document discusses welding consumables, which include filler wires, covered electrodes, shielding gases, and fluxes used in various welding processes. It provides classifications and standards for consumables for processes such as shielded metal arc welding (SMAW), gas metal arc welding (GMAW), gas tungsten arc welding (GTAW), and submerged arc welding (SAW). Key details covered include the composition and purpose of covered electrode coatings as well as flux types and their functions in arc welding.

Uploaded by

Niranjan khatua
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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Welding consumable

Welding consumable may be


 Inserts shielded arc filler wire, length or roll covered electrodes
 Shielded gases
 Separately supplied flux
 Fusible
Each consumable is critical in respect to

 Size
 Classification/supplier
 Condition
 Holding and storage
 Treatment E.g. backing/drying
Welding consumable stands for MMA /SMAW

 BS639 -Steel electrode


 BS EN 499- Steel electrode
 AWS A-5.1- Non-alloyed steel electrode
 AWS A5.5-Alloyed steel electrode
 AWS A 5.4- Chromium electrode
MIG/MAG (GMAW), TIG (GTAW)

 BS 2901 -Filler wire


 BS EN 440-Filler wire
 AWS A5.9-Filler wire
 BS EN 439 -Shielding Gases
SAW

 BS 4165-wire and flux


 BS EN 756- wire electrode
 BS EN 760-Fluxes
 AWS A 5.117-wire and fluxes
Welding consumable for MMA

 consist core wire typically between 350-450 mm in length and from 2.5 to
6mm Día
 wire covered with flux coating
 the core wire is generally of a low-quality rimming steel
 The weld quality refined by addition of reefing agent in flux coating
Function of flux constituents

 To aid arc ignition


 To improve arc stabilization
 To produce shielding gas to arc column
 To refine and clean the solidifying weld metal
 To add alloying elements
 To control hydrogen contents in the weld
 To from a cone at the end of the electrode which direct the arc
Common flux type

 Rutile
 Cellulose
 Basic
 Acid

BS 639 Covered Electrode


E5133B16020H E5133B: Compulsory 1602H: - Optional

E- covered electrode
51-Yield strength N/mm
Tensile strength N/mm
33-Thoughness
B-Flux covering
160-weld metal recovery
iron power content
2-welding position
0-Eletrical characterise
H- Hydrogen

BS EN 499 Covered electrode BS EN 499 Covered Electrode


E5042NIB72H10 E35-Minimum yield strength 355 N/mm
Minimum tensile strength 450-570 N/mm
E- covered electrode E38-Minimum yield strength 380 N/mm
50-Yield strength N/mm Minimum tensile strength 470-600N/mm
Tensile strength N/mm E42-Minimum yield strength 420 N/mm
4- Toughness Minimum tensile strength 500-640 N/mm
2NI-Chemical Composition E46- Minimum yield strength 460 N/mm
B-Flux covering Minimum tensile strength 530-640 N/mm
7-weld metal recovery E50- Minimum yield strength 500 N/mm
And current type Minimum tensile strength 560-720N/mm
2-welding position
H10- Hydrogen content
AWS A5.5 Alloyed electrodes
E7018 MG
E- covered electrode
70- Tensile strength
1-Position
M-Moisture control
G-Alloy control
AWS A 5.1/5 alloyed electrode
Cellulose flux ends in 0,1
E6010, E6011, E7010, E8011
Composition of covering

 Organic materials containing cellulose with some talinum oxide. Hydrogen releasing
 Thin easily removing slag
Characteristics

 Considerable envelope of shielding gas


 Deeply penetrating arc with rapid burn off rate
Uses

 All classes of mild steel weld in all position


 AC/DC electrode positive
Rutile flux electrode ends in 2,3,4
E5012, E6012, E6013, E6014
Composition of covering

 Titanium dioxide (ruttle ) and other hydrated mineral

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