Preheating rods

Tue, 31 Aug 2021 15:34:05 GMT

go to see Welding Machine for Preheating rods

What is the point if preheating what temp is it
Reply:To aid in penetration/fusion and avoid cracking. It really depends on what you are doing and what (if there is one) the wps says. Waaaay to general of a question dude.
Replyreheating the rod as in a rod oven is to stop moisture in 7018s. Preheating as in starting the before the point you want to start welding and going over it is to make sure the rod lays down uniform and doesn't spit porosity. If your putting in a root, you start before your end point and the rod will be hot and penetrate and tie in correctly.
Reply:hahahha i didnt even think of that possible meaning of preheat. It's not really a preheat its keeping them in a rod oven to keep the moisture content to a minimum in 7018 rods.
Reply:Is it rods you want to preheat or base metal ? Please be more specific so your question can be better answered
Reply:Rry guys I wanted to know about the preheating of rods I was at a shop were they had a little oven that they kept them in I for got to ask y they do that
Reply:Originally Posted by rcdriver55Rry guys I wanted to know about the preheating of rods I was at a shop were they had a little oven that they kept them in I for got to ask y they do that
Reply:To prevent moisture from becoming entraped in the electrodes flux. Moisture produces hydrogen which in turn creates a poor weld with various metal defects. Hence the name low hy for 7018 and its cousin rods. Low hydrogen rods should always be kept in a rod oven or caddy
Reply:even with non-low H rods I notice that they run cleaner and smoother if they've been kept in the rod oven.  I'm sure pretty much any rod will pick up moisture into the flux.  Keeping them dry seems to make pretty noticeable difference.  Of course for non-low H rods, just keeping them in air tight sealed containers also works...but I usually keep them in the oven for a while to make sure they're completely dry before putting them into the containers.--Wintermute"No man's knowledge here can go beyond his experience." - John Lockewww.improvised-engineering.comManufacturer Agnostic:Blood----------Sweat---------Tears----|------------------|----------------|----Lincoln Red, Miller Blue, Esab Yellow
Reply:300 degrees for low hyd rods like 7018 etc., not 6010 or 11 though, youd ruin the flux.
Reply:Originally Posted by wintermuteeven with non-low H rods I notice that they run cleaner and smoother if they've been kept in the rod oven.  I'm sure pretty much any rod will pick up moisture into the flux.  Keeping them dry seems to make pretty noticeable difference.  Of course for non-low H rods, just keeping them in air tight sealed containers also works...but I usually keep them in the oven for a while to make sure they're completely dry before putting them into the containers.--Wintermute
Reply:i've heard that some rods need a certain amount of moisture to be at their best. I can't remember which ones, but my instructor said that inspectors have all sorts of methods to calculate the 'wetness' of a rod, and some perform better with a certain amount of moisture.but a rod oven is meant to drive the moisture out of low hydrogen rods.
Reply:Originally Posted by Taideni've heard that some rods need a certain amount of moisture to be at their best. I can't remember which ones, but my instructor said that inspectors have all sorts of methods to calculate the 'wetness' of a rod, and some perform better with a certain amount of moisture.but a rod oven is meant to drive the moisture out of low hydrogen rods.
Reply:hmm...never heard that some rods needed to have some moisture in them.  I've also never had a problem with arc stability due to drying out a 6010/6011/6013/etc... rod.  I've noticed that they run a bit better when they've been in the oven for a bit.  I'll have to look up and see if there's any recommendation from the rod manufacturers on not drying a any of those rod types.  Thanks for the info.--Wintermute"No man's knowledge here can go beyond his experience." - John Lockewww.improvised-engineering.comManufacturer Agnostic:Blood----------Sweat---------Tears----|------------------|----------------|----Lincoln Red, Miller Blue, Esab Yellow
Reply:Cool, looks like I'm actually learning some good info in my welding course.