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Up Topic Welding Industry / Technical Discussions / mig alt to low hydrogen E-70xx rod
- - By hzg Date 02-03-2004 20:43
Not sure if this is the correct forum but does anyone have a reccomendation for a Wire feed alternative to Low Hydrogen E-70xx rod. We must do the job to code but would rather purchase a mig welder. Our application is 1/2" and we haven't found a wire rated for this app that is .045 in diameter (standard max for most consumer welders). Also any advice on gas shielded vs. flux core no gas would be helpful. Thanks
Parent - By dee (***) Date 02-03-2004 21:07
GMAW is a low hydrogen process more info as to applicable code will, I am sure, get you any other questions answered nearly any weld supply should have enough er70 at 045 to bury you beneath

regrds
d
Parent - - By RonG (****) Date 02-03-2004 23:21
The term Low Hydrogen generally refers to Hydrogen in the flux of a SMAW electrode.
Parent - By PhilThomas (**) Date 02-04-2004 15:34
The gas-shielded flux cored wire equivalents also have diffusible hydrogen designations (H2, H4, etc) to indicate if they are "low hydrogen" or not.

Parent - By MBSims (****) Date 02-04-2004 02:34
The key words here are that you must "do the job to code". Some codes, such as AWS D1.1, do not accept short circuiting mode of GMAW as "prequalified", and for good reason. GMAW is a great process for many applications, but I have also seen it used improperly in structural applications resulting in failures due to inadequate penetration and fusion. So you may have to perform a welding procedure qualification to demonstrate the procedure is capable of producing sound welds that meet code. I don't know what code you must meet, but if it is structural welding you would be better off using an 0.035" or 0.045" E71T-1 flux core wire with gas shielding. I would stay away from the self-shielded (gasless) flux core wires.
Parent - By bmaas1 (***) Date 02-04-2004 07:05
As far as application what are we talking about here, 1/2 " material, 1/2" welds or what.

Brian J. Maas
Parent - By dseman (*) Date 02-05-2004 05:18
If your application could call for higher depositions rates, 80/20 shielding, and the mechanical properties of E7018, then you may want to look at Hobart Formula XL-525 available in 0.045 diameter (or other E71T-1M types). It has a diffusible hydrogen spec of 3.38ml/100grams.

Tensile = 82Kpsi, Yield = 73Kpsi, Charpy V-notch=100ftlb @ 0F,
and 66ftlb @ -40F.

Amp. range of 150-300, Volt range of 24-31, ESO = 0.5-1.0"


Hope this helps,
-dseman

Up Topic Welding Industry / Technical Discussions / mig alt to low hydrogen E-70xx rod

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