Opinions on some welds?

[lobsterissmus]

Hi all,

Today I have mostly been practicing my welding on some 1.6mm sheet strips - any comments appreciated ! It's been three years since I did my basic C&G Mig course, on 6mm plate, so welding thin stuff is new to me!

I'm using an old Murex Trademig 160 at its lowest voltage setting.

1st pic shows vertical welds, basically playing with speed setting and gap between plates. 2nd pic shows penetration. I think run (4) shows the best results.

3rd & 4th pics show horizontal welding on vertical plates, adjusting gap only. Run (2) seems okay but I need to work on better penetration where I've tacked the plates together.

Anyway assuming I can learn to get better penetration of the tack welds, does my welding look up to the job? Anything I can improve on?

 

[Chris Stevens]

If you have an old Murex machine, then trying upping the power a little and using the pulse feature. This works very well fro thin sheet, and means faster welding speeds, and less chance of burn through.

 

[sapperb]

I agree, they look a little cold

 

[malcolm]

Can't fault the welds myself - when you have complete penetration (that's the norm for thin stuff) the welds aren't in any way cold.

Thin sheet is sensitive to heat. The tacks might have been done at a higher setting and if you want everything perfect and were planning to go over them grind them flat first. There's no heat to play with on thin sheet to melt them in. Starts can be a pain for the same reason too. That's the only nit picking I can see.

 

[lobsterissmus]

Cool, thanks for the comments .

I'm a lot more confident that I can do a good job now - will grind back any tacks and try out the pulse feature to see how it goes.