You did a lot wrong. Not cleaning correctly is a mistake. Buying "mild steel oxy filler rod" for tig is an obvious one :D RG45 rods are not made like tig rods. With good clean steel the weld will often be very gray. Same for coat hangers. In 70s-2 and 70s-6 tig rods, the -2 and -6 are sil...

Need some help people .... I am a hobby welder but I have welded a lot of SS and Al with TIG .. and although not an expert by any means I can lay dropped pennies with regularity in most situations. Previously when I had to weld plain steel I turned to the MIG ... its easy, fast and clean ... turn on...

EDIT of EDIT and I just found another tutorial about DC welding of stainless using high pulse rates to get less distortion of low thermal conductivity metals for critical work .... so the answer is: DC voltage doesn’t change polarity. Polarity frequency is different than pulse frequency. yes thats ...

Still some question remains regarding the usefulness of the configuration OP presents. Perhaps it depends on the time constant for puddle melt/solidification such that you could reduce overall heat input but still benefit from the peak current input? I am sure there are scenarios where a very high ...

Your using the same measure to reference two different things. Pulse generally refers to high and low amps( relationship is in frequency of times between highs and lows). Frequency of the AC is in reference to the actual sine wave of the electricity. Nope I'm not ... as you can see from the diagram...

Hi,

I have an AC/DC machine which has a fixed AC frequency of 60Hz but also has pulse capability of 300Hz and AC balance control.

While I understand the principle of pulse and AC balance whats the point of having a pulse frequency greater than the AC frequency as per the attached pic??

My adventures with solid wire ss it that its very finicky with the settings. Sometimes its great, but then sometimes it was horrible. I've seen a guy do the most fantastic looking welds, and then another guy lay pus on the same machine. Mine was one an old pulse machine with auto wire setting so it...

Just wanted to post my experience with using the Ar/CO2/O2 mix with stainless: 1: had to use higher voltage than expected 2: wire is very stiff, so keep your gun lead straight 3: with mild steel can clamp to the bench, but with stainless worked much better with clamp on material! 4: could achieve sp...

Very nice. I think I have to cut down to five kilo rolls on my old mig. The old girl doesnt like towing wire off the heavy 15 kg roll. Yeah I did that but got bored and decided to make something I didn't have to wind into :-) On a side note, how do you find the boss weld stuff? Hmm lets just say it...

Hi, I have one of those MIGS which takes the bigger 5kg reels but has no built in adapter for the small reels and I had a small job to do in Stainless which I usually do with TIG but this is a painful and awkward job so I wanted to try SS MIG but didn't want to buy a 5kg roll of SS. So I made the ab...

Hi People, I have a small job to do for a mate in stainless and normally would do this with TIG but its a shedload of tricky corner welds and I wanted to use MIG. It doesn't really matter what it looks like but strength is the main issue so ..... I have my pure Argon I use for TIG and my “SpeedShie...

Edgewalker wrote:What do you mean by "tricky corner weld?"

Sent from my SM-J320VPP using Tapatalk

Lots and lots of 10mm x 1.2mm box butted onto 6mm plate ... not hard but just painful ...

Hi People, I have a small job to do for a mate in stainless and normally would do this with TIG but its a shedload of tricky corner welds and I wanted to use MIG. It doesn't really matter what it looks like but strength is the main issue so ..... I have my pure Argon I use for TIG and my “SpeedShiel...

Just wwanted to say thanks to everyone who replied; your suggestions were really appreciated and I hope they help others with similar problems.

thanks

TRACKRANGER wrote:Forgot to mention: ER80S-D2 Low Alloy Steel filler might be suitable.

Thanks for this thought. I decided to use a 309 cos I was a little worried about the filler corroding and it has enough Ni to still give a little flex.

I may be over simplifying this, but why not just put a valve stem in that hole also. Unfortunately not! The hole was on the outer surface of the rim and pointed outwards. As this is a 4WD truck the stems need to be inside and pointed inwards otherwise they would get ripped out the next time we went...

If you are not sure how to weld it, drill and tap for a small tapered pipe plug - use loctite and done deal. Don't you hate it when someone thinks laterally ..... Probably not enough bite at 4mm to use a tapered one but why not just a round headed bolt with proper high pressure sealant. It would wo...

If you are not sure how to weld it, drill and tap for a small tapered pipe plug - use loctite and done deal. Don't you hate it when someone thinks laterally ..... Probably not enough bite at 4mm to use a tapered one but why not just a round headed bolt with proper high pressure sealant. It would wo...

Kinda off subject, but if the wheel sees anything but low speed, it will be off balance like crazy. Sent from my SM-G900R4 using Tapatalk This does see highway speeds of 130km/h but the rim and tyre weigh ~85kg (no that's not a typo 85kg!) and balance weights can be 200+g so the few grams of the bo...

MIG, TIG, Stick, Or Gas? I'd use a grade 8 bolt sawed off as long as your wheel is thick, and TIG with Hastelloy W. Be aware that some vehicle applications you are not allowed to weld on wheels at all. I don't know what your wheels are made of, (hence the Hastelloy W) I scrapped some truck wheels, ...

Hi, Thanks for the quick reply. Definitely TIG. The wheels are steel and huge! The centres are 12mm plate steel and the rim band is 4mm folded plate. The centre is submerged arc welded to the rim band. The "mistake" hole is in the band and well away from the centre plate/band seam. I am go...

Hi, Recently an engineer was asked to place a second valve hole in a set of heavy duty rims for an off road vehicle. but he made a mistake on one pair (how can he get 4 correct positions and 2 wrong ???? but that's for another day...) Now the rims are complete overkill for the application: the swl o...

I thought I would update people as to what I have found while experimenting with this problem. Please note this may not work for you but I hope some of it helps if you have similar problems. Note 1: the original problem was that although other welds worked fine I was having a big problem with Alumin...

Thanks for all the suggestions people, I will set up and try them today. Just out of interest when you are doing fillets do you use a bigger cup and rest it on the material so you have a consistent arc length (see quick diagram attached) or do you prop the cup away from the corner? I wondered whethe...

Hi, I have a Thermadyne 186 AC/DC welder and have pretty good success with everything except fillet welds in on Al. I can weld the butts and laps very nicely but have had no success with the fillets. As I have about 70 of these to do I was wondering if someone can suggest some things they might do. ...