Well I got that book and took a first look at it this morning. You're joking aren't you?

Lincoln Electric is joking. 'Procedure Handbook' ? A handbook fits in the pocket and contains handy tables and such. Here's a good one for you: https://www.google.com/url?sa=t&rct=...tRdsLRctw9FFvx

This thing is an encyclopedia, and engineering manual, a history book, a discussion on aesthetics....

Directing people to this as an answer to a little question is like directing someone who asks what is Pythagoras' theorem to Russell's Principia Mathematica.

The word overkill doesn't adequately convey...

But, having said all that I've got to admit it's a great book and I'm glad to have it. An excellent addition to a library. You start reading a little bit and get sucked in further and further. I like it. Thanks for bringing it to my attention.

Until now my 'major' work on welding has been 'Modern Welding' by Althouse, Turnquist, Bowditch - recommended to me as the 'Bible' some years ago by welding aficionados. Now it has a companion. A big brother I think it might be.

You had it correct in the beginning when you said 'more heat = more penetration'. Big rods get down into the bottom of the joint just fine.

Also, how would the know you had excess penetration in the root if there wasn't a side view? Most of the fillet stuff we do is welded all the way around, you can't see any root penetration from the side.

There is definitely a tendency to overthink things in this forum.

3. WeldingWeb Artisan
Join Date
Apr 2010
Posts
2,166

abrogard

Originally Posted by abrogard

. . . Directing people to this as an answer to a little question is like directing someone
who asks what is Pythagoras' theorem to Russell's Principia Mathematica. . .

Pythagorean math is undisputed - [Pythagoras influenced Plato] - Platonic Ideals are not
pure mathematics . . . hence the disasters of the 20th Century - and the self-generating
extinctions in the 21st Century . . .

Russell
had help . . . https://en.wikipedia.org/wiki/Kurt_Gödel . . . via Newton . . .
https://en.wikipedia.org/wiki/Standi...ders_of_giants

For the nonspecialist - this a good first read . . .
https://en.wikipedia.org/wiki/Gödel,_Escher,_Bach

Opus

ps - are you Down-Under . . . ?

Join Date
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New Zealand
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Originally Posted by TimmyTIG
You had it correct in the beginning when you said 'more heat = more penetration'. Big rods get down into the bottom of the joint just fine.
some one did a cut and etch test video on small rods vers large rods. the large rod had less penetration and think even a bit of lof.
"more heat = more penetration" is quite right, however if you can do the same heat with a smaller rod you will get better penetration. the other way to look at it is a bigger rod at the same amps will give less penetration.
the other part of this, and i think this was the point of the video, is the size of the flux. its the overall diameter of the rod that matters. some of the really thick coated rods can give less penetration.

5. WeldingWeb Craftsman
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Originally Posted by abrogard
This wouldn't be right else I'd have heard of it before now, but I just thought of it and thought maybe it was worth bringing up.

In the interests of penetration wouldn't we be better always starting with the smallest rod?

Because the typical joint is a right angle, true? So to get right into that angle you need a small diameter rod. True?

Get a great big thick rod and it won't get in the same as a thin one.

Obviously it just doesn't matter in practice but I wonder if it holds true in theory - would a small rod get in there better than a thick one, at least to some extent?
.
.
rule of thumb use a rod 40% to 100% thickness being welded flat welding on a bench
3/32 rod for 1/8 thick
1/8 rod for 1/4 thick
3/16 rod for 3/8 thick, sometimes 5/32 easier
3/16 rod for 1/2 thick
.
if you weld vertical up or overhead its easier to use 3/32 and 1/8 rod, rare to use 5/32 rod and even rarer to be over 150 amps. vertical down welding you can go faster and use more amps but normally under 200 amps

"Consider acquiring: Lincoln's - The Procedure Handbook of Arc Welding."

I got a mid-1950's edition for 50 cents. Great read. Though they didn't weld the book cover on very well.

Mine has some funny parts. Like when they go on and on about how welding is replacing rivets and many modern bridges are welded together.
Last edited by Oldendum; 08-11-2018 at 06:04 PM.

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