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Dave, Let's say I was welding steel panels onto a square frame of tube steel by welding the steel plates together using the tube steel as a backer. If I weld both side panels to the top, front, and rear panels first and then come back and weld the top panel to the front panel between the sides...

Thanks HgTX. In fact as soon as I got the CoC from my reciving department I did call them and confirmed that the metal core E110C-K4 is a H4 wire. The lab suporvisor I talked to wasn't sure why they don't put the H4 on the designator for that wire like they do others. Also someone within my...

I'll have to get someone to get me a copy of the certs. The tacks were made by the same wire. I'm really not happy to hear that the results of some of the test were higher than the 4 ml/100 g that they claim in the MSDS. I was hoping we were already using the right wire.

metengr, The designator K4 according to TriMark is the same as a H4 designator. It has the same Hydrogen dissolution rate of less than 4ml/100g. Sorry I guess I stated that wrong in my previous post. I should have stated that the K4 designator on our weld wire is = to H4. Sorry I want to make...

metengr, I'll look into that, but due to our application there is a lot of skittishness about any high heat applications. I did confirm that our weld wire is the equivalent of H4. thanks

metengr, That's kinda hot. What's that going to do to my 12560?

I can get them to throw a new spool of the metal core wire on the machine for this but since all that stuff is packaged in cardbord I don't think one wheel is going to differ that much from another. And since the welds I'm having cracks in are welded by diffrent opporators on diffrent machines...

metengr, Thanks I'll pass that on to the tiger team and see if these are things that they have looked at already.

uclesyd I've been trying to get rid of that stupid galvanized backer since I got on this project, but it's not going away. We do prep the backer by grinding it to remove some of the galvanized first and we are usuing a root pass and cover pass weld. The cracks are only in the weld and they are...

Base metal is 12560 with a A653 galvanized sheet steel backer. Beveld groove weld. Process is GMAW Pulse. Let me know if there is any more infromation needed.

I'm trying to find at what tempature change rate will cracks form in sound weld using E110C-K4 weld wire.

Red, The theory as stated is that weld spots and arc strikes on the steel out side of weld zones does little to comprimise the strength of the steel. Products we are wroking with need to be impact resistant. We use 46100 and 12560 mostly, along with some harded tool steels. Thanks for...

I'm trying to find mechanical properties and comparisons for 46100 and other high hard steels against the softer steels used in construction and other industrial uses. Especially interested in what effects welding has on high hard steels. Basically I'm trying to find studies or reference...