The 'e' in E6013 or E7018

  1. mdr

    mdr Collector of welding machines

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    On this page...

    https://www.mig-welding.co.uk/electrode-classification.htm

    It mentions a couple of times...

    E just means the electrode is for MMA welding and has a flux coating.

    Could this be improved? Consulting The Science and Practice of Welding by A. C. Davies, fifth edition, it could be strongly argued that the E is for 'extruded'; in comparison to 'dipped' for example. Hence, the 'E' is in reference to the manufacturing process of the electrode.

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  2. daleyd

    daleyd Member

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  3. zzr1200

    zzr1200 Working at 650 ft on open steel work

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    E does represent extruded, its how the various sizes of wire are formed, mig wires also "E" codes, ER120S-G, ER70S-3, ER70S-A1, plus various other wire spec.

    The welding processes are known as mma, mag, mig and tig, but that also depends on what size of the big pond you come from...
     
  4. zzr1200

    zzr1200 Working at 650 ft on open steel work

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  5. daleyd

    daleyd Member

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    Yes, but the post was specifically asking about an MMA electrode.

    From TWI -

    The designation of a covered electrode begins with the letter 'E'. This tells us that this is a covered electrode intended for MMA welding.
     
  6. daleyd

    daleyd Member

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    More from TWI, referring to both European and American designations -


    To illustrate briefly how the electrodes are classified, the following gives a summary of the key features.

    The first character 'E' is common to both classifications and indicates that the electrode is a flux coated manual metal arc electrode. The next two digits indicate the tensile strength.
     
  7. mdr

    mdr Collector of welding machines

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    Another page from A. C. Davies...

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  8. daleyd

    daleyd Member

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    What’s the date on that book?
     
  9. mdr

    mdr Collector of welding machines

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    I believe it's 1963. Does that mean it's out of date, should be disregarded, and the meaning of the 'e' has evolved?
     
  10. waddycall

    waddycall Member

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    Probably different standards being referred to. Be worth checking the standard used in the book
     
  11. daleyd

    daleyd Member

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    I would say so - given its nearly 60 years old. I imagine there’s been quite a few updates and standardisations in that time. The info on here seems to reflect the TWI guidance which is that in both American and European designations the E just means Flux Coated Electrode.
     
  12. zzr1200

    zzr1200 Working at 650 ft on open steel work

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    The "E" stands for electrode which is the filler material the futile covering is not electrically conductive the different filler wire diameters are produced by extrusion.

    Millers consumable division Hobart also state that electrodes come in various forms.

    Stick=mma=smaw.
    Mag =mig=gmaw.
    Flux mag = fcaw.

    All use electrodes in different forms .
     
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  13. slim_boy_fat

    slim_boy_fat Forum Supporter

    It definitely was when I had a go. :ashamed: :laughing:
     
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  14. daleyd

    daleyd Member

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    I’m not saying they don’t - I was just pasting the info from TWI which was in reference to MMA electrodes which the original post was about. There is another whole section about mig wires and another about tig - but the op sepecifically asked about MMA electrodes.
     
  15. zzr1200

    zzr1200 Working at 650 ft on open steel work

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    I do suffer the same problem at times.

    PS.

    In theory we only ever need to buy one of each type/size of tungsten electrode, I've also spent hundreds over the years..:doh:
     
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  16. zzr1200

    zzr1200 Working at 650 ft on open steel work

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    The link in the OP post to the information quoted appears to be from the AWS web site, but knowing how the Yanks bastardise and mis-spell the English language, their use and meanings are open to a wide mis-intepretation and usage.
     
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  17. daleyd

    daleyd Member

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    The top portion yes, but underneath is the ISO part - but basically I think both refer to the E as referring to electrode. I can’t find any ref to extrusion/dipped - I think that may be a historical designation?:dontknow: TechnicAl would probably be able to shed more light on it
     
  18. mtt.tr

    mtt.tr Member

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    Al would be my first person to ask

    @TechnicAl
     
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  19. Sean Another 602 fan

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    2,3,4&5 are also the categories of undesirable women to avoid when your drunk
     
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  20. Memmeddu

    Memmeddu Member

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    Agree with you

    I've always knew that the "E" stands for filler material which carries electrical power
    So it work both as electrode and filler metal
     
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