Adam Marshall
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what are the advantages of using this wire over solid wire? Is this a copper coated wire?
- Thread starter Adam Marshall
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Its become a sort of best quality MIG wire but in truth its a higher strength grade over the standard wire. It has higher Mn and Si which will increase the weld strength and make it less inclined to be porous (so it will deal with rusty plate better)
When I was at Lincoln we made it into a product that performed differently. Because of the higher Mn and Si it can tolerate higher S levels without adverse effect on the metallurgical properties. The higher S content changes the surface tension of the molten metal and the slag tends to form on the bottom leg of a fillet and it also wets better.
When I was at Lincoln we made it into a product that performed differently. Because of the higher Mn and Si it can tolerate higher S levels without adverse effect on the metallurgical properties. The higher S content changes the surface tension of the molten metal and the slag tends to form on the bottom leg of a fillet and it also wets better.
gordon stephenson
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Every day is a school day,
Munkul
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What disadvantages does it have?
I get confused... For years I specced A18 mig wire... Or ER70S3/6... Now I'm speccing G3Si1... It always does the job cos I make sure I get quality brands, but wondering if I should try some G4Si1... This is all on S275 mild steel
I get confused... For years I specced A18 mig wire... Or ER70S3/6... Now I'm speccing G3Si1... It always does the job cos I make sure I get quality brands, but wondering if I should try some G4Si1... This is all on S275 mild steel
Munkul
Jack of some trades, Master of none
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But it all falls under the er70 strength category? Which at worst, should overmatch S355 grade steel?
Are we talking more of a better alloy quality in terms of corrosion, impact properties etc?
I fail to understand why I'd ever need or want to spec g4si1, other than because it's "better"... If you know what I mean
Are we talking more of a better alloy quality in terms of corrosion, impact properties etc?
I fail to understand why I'd ever need or want to spec g4si1, other than because it's "better"... If you know what I mean
The American AWS spec ER70-S6 is a very broad spec....in Europe we decided to split it....so the bottom end of the Si/Mn spec becomes G3Si1 and the top end becomes G4Si1.. This gives greater consistency....as I said earlier the Tensile strength will be higher in the G4 but there are some that prefer the welding characteristics of the G4....In Lincoln we made Supramig and Supramig Ultra....G3 and G4 respectively.....we decided to tweak the chemistry to make them perform differently....other manufacturers may not....I know Bohler do the same (in their German made wires).
Do you need to change to G4....not unless it suits the mecahnicals of the plate youre welding or if youre getting porosity from rusty plate....does it weld better....in the case of Lincoln...its different.
Do you need to change to G4....not unless it suits the mecahnicals of the plate youre welding or if youre getting porosity from rusty plate....does it weld better....in the case of Lincoln...its different.
In practice, the G4Si1 weld will have a higher strength than the G3Si1.
denlow60
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Yes, that is correct, but it is about the minimum yield strength that the manufacturer guarantees.
Lincoln classify Supramig Ultra as G50 5 M 4Si1.....higher than Supramig G46 4 M 3Si1
Esab classify their G4Si1 as G46 etc
Tangledfeet
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I've read that some Lincoln wires are manufactured in the UK; out of curiosity do you know which ones @TechnicAl ..?
Supramig and Supramig Ultra
I was one of the team that started the factory in Sheffield....so I do have an interest and some experience.
denlow60
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Yes....thats the same as the Esab classification
but look at Supramig Ultra...thats G50....so theyre not all the same
