Page 195 - CITS - Welder - Trade Theory

WELDER - CITS

Filler metals for GTAW Types & Specifications as per
BIS & AWS and Argon / Helium gas properties and

application

Objectives : At the end of this lesson you shall be able to
• describe the filler metals types for TIG welding
• explain the filler metal specification for GTAW
• explain the TIG welding helium gas.

In the welding process (GTAW or gas tungsten) is an arc welding process operates the filler rods.
The TIG torch may be cooled by air or water and the process uses a filler metal in road form. The tungsten Elec
trod selection and parameters for welds are guided them.

Gas tungsten arc welding also know as tungsten inert gas (TIG) welding, is an arc development within the GTAW
process.
Now always the filler rods is withdraw from the weld pool each time the electrode can be changed.
welding filler metal designators

1 1 Carbon steel electrodes
Mandatory classification designators
Designates an electrode

Designates minimum tensile strength, in Ksi, of the
as- deposited weld metal.
Designates the welding position, the type of covering
and the type of welding current for which the
electrodes are suitable (See table below)

Optional supplemental designators
Designates that the electrode meets the requirements
of absorbed moisture
Designates that the electrode meets the requirements
of the diffusible hydrogen test with an average value
no exceeding "Z" mL of H2 per 100gms of deposited
metal.
Designates that the electrode meet the requirements
for improved toughness and ductility.

Optional supplemental designators
AWS Classification Type of covering Welding position Type of current b
E6010 High cellulose, sodium F,V,OH, H dcep

E 6011 High cellulose, potassium F,V,OH,H as or dcep
E 7018 F,V,OH,H ac or dcep
Low hydrogen,
Potassium, Powder

E7024 Iron Powder, Titanium H-Fillets, F ac, dcep or dcen

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CITS : C G & M - Welder - Lesson 61-76 CITS : C G & M - Welder - Lesson 61-76