- Thread starter Ben88
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Ben88
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Yeah I think it is machined steel sometimes it welds fine and sometimes I'll be putting a lovely fillet down an all of a sudden I get loads of porosity from no where or like you say I get a hair Line crack sometimes up to 1" long through the fillet. I tried today to put less heat into the job I think it helped but then again when I went to tack up a cold job, it did it on the arc so It doesn't seem that it's anything to do with heat. Any solutions? when they have cracked or bubbled up the only way I've found to get rid is putting another run over the top of previous weld but I've got a nagging feeling that it's still going to be there underneath
Ben88
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This one welded fine but just to show you material it happens on I initially thought it was machined steel someone else said its bright steel and another said its mild steel. Im presuming that machined steel is mild steel that's had its contents changed added more hydrogen into it or what ever they do with it then it's machined down to size so in respects there talking about same stuff?
Hood
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Ok I was thinking you were meaning round bar. That often comes in a free machining variety for turning on a lathe, it can have lead or sulphur or other things added to aid the turning. The problem is these additions can cause problems if the part needs welded and thus it is not recommended if welding is required.
I got a load of steel a while back from a place that was closing down its local operations, all grades but some was EN1A leaded bright round and it is just no use if welding is required, luckily the round bars are all paint coded on the end so I know what is what.
Welding over the top likely won't be the best idea, grinding out and re-welding may yield better results but even then I wouldn't be happy with it if it was getting used in anything structural.
I got a load of steel a while back from a place that was closing down its local operations, all grades but some was EN1A leaded bright round and it is just no use if welding is required, luckily the round bars are all paint coded on the end so I know what is what.
Welding over the top likely won't be the best idea, grinding out and re-welding may yield better results but even then I wouldn't be happy with it if it was getting used in anything structural.
Hood
I am obsessed.
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The colour coding can vary, often steel merchants will have their own colour coding, this was the case with the steel I got but I also got a colour chart from them so I know what is what.
If it is just something like led brackets that they are being used for then strength may not be an issue and as long as you can make them look cosmetically good then likely it will be fine.
If it is just something like led brackets that they are being used for then strength may not be an issue and as long as you can make them look cosmetically good then likely it will be fine.
