by Camaro Joe
(Vancouver, Washington)
I think you did a great job demonstrating the effects of both on 1/4" welds.
The real issue I think isn't always clear though.
I used to weld thinner metals for a popular pressure washer manufacturer and on thinner metals you get a beautiful weld going downhill. Obviously everything is based on circumstances and I just thought the readers should know you cant rule out downhill. You just need to know when to use it.
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good point, downhill almost always look better and on thinner metals, penetrates just fine.
I think the cutoff is somewhere around 3/16" -1/4" thick before downhill is likely to have issues with penetration.
Return to mig welding techniques.