If you were preheating a piece of alloy steel that has been quenched and tempered, at about what temperature range would you start to risk ruining the temper? I'm guessing the exact temperature would depend on the particular alloy, but are there general guidelines?

Great points...thank you both!

Hi all, I'm new to the forum here. Question: I realize that increasing WFS will increase amperage in short circuit mig (given the voltage stays constant), so one would naturally think that that also increases weld penetration/fusion. But I've also heard that since turning WFS down will allow you to ...