when to use 1.0 wire

[Islander71]

I've used 0.6 and 0.8 mig wire, but I see my Rohr 200mi can use 1.0 wire. I'm curious as to when it would be an advantage to use it - if at all - would it be when over a certain thickness of welding or when using above a certain ampage or just when a thicker fillet is needed?

 

[zzr1200]

Both really, depending on the requirement for joint fill rate, and the type of weld fillet type (fillet, lap, butt touching and/or open) , an open outer corner joint requires more filler material with lower voltage (reduced burn through?), than a outer corner that is overlapping and may require a thinner filler wire with the same or higher voltage to obtain full penetration.
Another controlling factor is the travel speed at which the weld is deposited...........(we need a can of worms emoji)


It's stick (mma) that is amperage defined, which is a whole new field of discussion.......

 

[arther dailey]

I have some in my oxford mig , could nt be asked to change rolls and wire so used it on a exhaust repair tother day , only one blow through (miracles do happen) , anyways all went well , think .8 would have been easier maybes . but great on 5mm steel

 

[Bornfree]

I tend to use 0.8 up around 6mm.

 

[Rrobson]

You’d need it when your welder can’t feed enough 0.8mm wire fast enough for the amps it is supplying, or can’t put enough metal down for the size of the joint.

At 200a your at the boarder of moving up to 1mm. If you found your machine couldn’t put the wire down at the highest setting then you’d need to consider switching, but in reality it will likely be fine.

I currently use 1mm for everything, although when the roll runs out I am tempted to get a 0.8 and a 1.2 roll as my machine runs out of pace at the upper end of the amp range. The problem is 1mm is quite versatile…

 

[addjunkie]

I keep 1mm in my machine all the time, only change to .8 for thin stuff. Never bother with .6, don't even have a roller on my current machine. But I have a 270 amp machine and mostly do heavier stuff.

 

[indy4x]

You’d need it when your welder can’t feed enough 0.8mm wire fast enough for the amps it is supplying, or can’t put enough metal down for the size of the joint.

At 200a your at the boarder of moving up to 1mm. If you found your machine couldn’t put the wire down at the highest setting then you’d need to consider switching, but in reality it will likely be fine.

I found this with my RTec 250, flat out was too much for 0.8 wire so moved to 1.0 and it was much happier

 

[Jack_K]

Over here in Australia I'm told 0.9mm is the most common but isn't used much in other countries.

 

[Erie Fred]

Over here in Australia I'm told 0.9mm is the most common but isn't used much in other countries.

.9mm = .035 in.
.035 solid wire is very common here in the USofA.

 

[Islander71]

Thanks for all the replies, has made it clearer for me.
On a different note, I had sent for mig wire from Screwfix - they were offering 2x 5kg rolls of 0.8 GYS wire for £37.99, which sounded good to me for what I think is European made wire. Arrived today, they've sent "Toparc" wire made in China! Not sure whether to send it back -has anyone used it?

 

[Onthespotwelding]

As it isn’t what you ordered I would send it back.

Cheapest 0.8 5kg wire I have used was this in Halfords.

https://www.halfords.com/tools/garage-workshop/welding-and-metal-work/sip-mild-steel-welding-wire-0.8-mm-117408.html

Its decent wire and very reasonably priced. Think I only paid £14 per roll iirc.

 

[Ed.]

Over here in Australia I'm told 0.9mm is the most common but isn't used much in other countries.

Most of the time I just use 0.9mm from 2.0mm steel up to 10mm depending on use, anything thicker it is 1.2mm and under 2.0mm I go to 0.6mm. but the situation changes when I can't be bothered to change, wire, rollers, torch and all the other bit's and pieces. Most of the time I just make 0.9mm work, it's quite a versatile size for me.

 

[Popcorn]

H740118 H740118 Mig Wire Midi Spool 0.8mm X 5kg

Popular A18 MIG/MAG welding wire. Available in a range of diameters and reel weights.

engweld.co.uk