Advanced Welding Processes: Technologies and Process Control

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Advanced welding processes
3 Flat and horizontal
4 Flat
5 Flat, vertically down, HV fillets
9 Any combination not classified in 1–5
Current and polarity
Digit DC AC
0 As recommended Not suitable
by manufacturer
1 + or – 50 minimum OCV
2 – 50 minimum OCV
3 + 50 minimum OCV
4 + or – 70 minimum OCV
5 – 70 minimum OCV
6 + 70 minimum OCV
7 + or – 80 minimum OCV
8 – 80 minimum OCV
9 80 minimum OCV
Typical example
The classification for an all positional basic (with iron powder) hydrogencontrolled
electrode with a minimum UTS of 510 N mm –2 and yield strength
over 450 N mm –2 and impact properties better than 28 J at –40 ∞C and 47 J
between –40 and –50 ∞C would be:
E 51 5 5 BB 160 2 8 H
American Welding Society (AWS) Standard A5.1
The AWS Standard is less complicated, consisting of a prefix E followed by
only two sets of digits:
E Electrode
xxx Two or three digits indicating the tensile strength in 10000 psi
units.
xx Two digits indicating the coating type and application as follows:
Exx10 Cellulosic, DC +ve. Deep penetration, all position
Exx11 As Exx 10, but usable on AC
Exx12 Rutile, AC/DC, flat and HV positions
Exx13 Rutile, AC/DC, all positions
Exx14 Iron powder rutile, high speed
Exx15 Basic low-hydrogen, DC +ve, all positions