type of weld

[sparman]

we have person who said single weld is stronger than weave weld. I say weave is stronger . any thoughts

[eecervantes83]

Do you mean stringers vs weave welds?

[sparman]

right i mean stringer

[Nathan128]

type of weld

I've been told stringers are stronger also but I honestly don't think it matters. If it's a for example 7018 rod if it's a properly welded weave or stringer filling up the same size area it should be exactly the same. 70,000 lbs /sq in

[Portable Welder]

Stringers are stronger than a weave, some people will do a wide weave and you get what is called cold lapping, where you leave thin layer of weld metal that does'nt sufficiently melt into the metal below.

Where stringers beads keep the heat in a more concentrated area allowing for the metal to sufficiently melt into the metal below making it as one.

The larger the wire or rod is along with more heat allows for a wider weld.

[Sberry]

They are the same.

[sparman]

Say your doing 3/4 metal in a spray mode with .045 wire.what would you recommend

[Portable Welder]

S. Berry, The picture you showed are acceptable weld widths, what I was referring to is when I see guys do a weave that is twice as wide as the widest one you showed.

Thanks for showing us the picture to clarify what a stringer and a slight weave looks like.
Regards.

[Nathan128]

type of weld

Portable welder. I disagree. You can do a very wide weave with totally acceptable results. You need more heat and to really watch the flux doesn't get in there. For example heavy plate butt joints on tanks. Those are done with a root pass and then filled up with one pass going up and that's 3/4"+ plate. I mean I'm not a welding engineer but I've seen lots of weave passes that are much better than stringers. Just my opinion.

[mikehill]

Not sure if it's any stronger but I think it looks good

[aametalmaster]

Some codes you can only run stringers that are 5x the rod/wire dia. Our welding inspector is real picky on this...Bob

[Portable Welder]

Nathan 128, I did mention that you could have a wider weld with increased wire size and heat in my first post.

[sparman]

Thanks for all the help I appreciate it very much
Rob

[Bentrod]

Stringers are stronger.

Possible cold lapping, lack of fusion, slag/silica entrapment, voids, re-entrant angle, and roll are just some of the reasons we can not use weaves of any kind at the shipyard where I work. Even on pulse-down beads that meet criteria, the rule book specifically states "No weaving allowed"...and that is down beads where you must stay ahead of the puddle! Only on vertical up pulse do they tend to look the other way and allow us a bit of weave without saying anything.

[Bentrod]

Not sure if it's any stronger but I think it looks good

If you look at the weld, you can actually see at least six spots of lack of fusion on the outer edges of the weld where it has not properly fused into the base metal. Will it hold? Probably, depending on what it is for, but its not a super strong weld per se.

What you are really looking for is something like the first picture on this thread; really tight lapping: that is strong. Its called "carrying too little wire". All you need to do is slow down the forward movement a bit, and give the rod/gun a little weave and it will flow right into that base metal. You have almost got it!

I am only pointing this out because I enjoy helping new welders learn how to weld. Even though my body looks like a heroine junkie from all the sparks and slag that has hit me over the last 22 years, it is a profession that has served me well. It is a good career and honestly in high demand.