welding electrode selection chart

 Welding Electrode Selection Chart

welding_electrode

Electrode identification Since there are many types of electrodes, the American Welding Society (AWS) has established a numbering system that is used by the welding rod.

The Canadian Standards Association standard for mild and low alloy steel electrodes is W48-1M, which is roughly the same as the American Welding Association A5.1 standard. The difference lies in the fact that CSA uses the SI metric and AWS still uses the inch-pound system to indicate the tensile strength of an electrode. CSA uses Megapascals (MPa). In the case of the E7024 electrode, 70,000 pounds per square inch translates to 480,000 MPa. Under the CSA specification, E7024 becomes E48024, but the requirements that the electrode must meet are the same in both cases.

This is how the numbers read: welding electrode

1) The letter "E" indicates that the rod is intended for arc welding.

2) Next two numbers (if four numbers are used) or three numbers (if five)

numerals are used) multiplied by 1000 to indicate the tensile strength of the weld

metal in psi. The next-to-last number indicates the position in which

electrodes can be used. Position flat, horizontal, vertical, or. Might be possible

overhead.

3) Here a number 1 will indicate that the electrode can be used in all

positions. A number 2 would indicate that the electrode could only be

used in a flat position

4) The last number indicates the electrical characteristics of the electrodes,

i.e. AC, DC, and DC directly or reverse. this is the last number

This is somewhat unreliable due to the type of electrodes used today.

For example, an E7024 electrode would have the following characteristics:

E - electrode (arc welding)

Multiplying by 70 - 1000 means 70,000 psi (pounds per square inch) tensile strength.

2 - flat position

4 - AC and DC (straight and reverse)

E7024

Electrode identification

Welding Symbol 

 

welding joints

welding position