Welding rod question

I understand that L H7018 means low hydrogen 70000 lbs per square inch. What does the 18 mean? Thanks for your answer. Walt

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E. Walter Le Roy wrote:

The flux, which affects how you weld with it (the welding position, AC vs. DC, spatter, slag texture, etc.).
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Tim Wescott
Wescott Design Services
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E. Walter Le Roy wrote:

Wrong! That is rod meant to be welded using only your LEFT HAND!!!
:-)
GWE
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The "1" designates an all position rod, as opposed to a "2" for flat position only .
The 8 designates the flux type. In this case, a Low Hydrogen flux.
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wrote:

Ernie: Doesn't it mean flux containing iron powder? Is a 7028 a low hydrogen rod? Or is that a 4 ending that means heavy iron powder, like a 7024?
Steve
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On Tue, 27 Dec 2005 17:14:55 -0800, "Steve B"

From Lincoln's web site:
http://www.lincolnelectric.com
One of their pdf files, you'll have to find it yourself. I renamed it and don't feel like searching for it right now :)
They do have a lot of good info on electrodes if you care to find it.
Use a fixed font so this lines up correctly.
AWS A5.1 E 60 1 0 | | | | Electrode---------------------------- | | | Tensile in ksi------------------------- | | Position---------------------------------- | Type of coating and current-----------------
Position: 1 Flat, Horizontal, Vertical, Overhead 2 Flat and Horizontal only 3 Flat, Horizontal, Vertical Down, Overhead
Types of Coating and Current: Digit Type of Coating Current ----- -------------- ------- 0 Cellulose sodium DC+ 1 Cellulose potassium AC, DC 2 Titania sodium AC, DC- 3 Titania potassium AC, DC+ 4 Iron powder titania AC, DC 5 Low hydrogen sodium DC+ 6 Low hydrogen potassium AC, DC+ 7 Iron powder iron oxide AC, DC 8 Iron powder low hydrogen AC, DC
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Leon Fisk
Grand Rapids MI/Zone 5b
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*********** I was taught the '1' means 'any position' welding. Flat, vertical, overhead. If I remember correctly, I believe the '8' means DC only, reverse polarity.... but I don't remember that well anymore.
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Thannks for the replys. It wasn't real important, but satisfied my curiosity. Walt

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