What would you recommend as a blasting material? I usually use a 3M Fast Strip to clean HR, but I am curious if I can start blasting small parts. I currently have aluminum oxide in the blaster. I would probably still hit it with the 3M disc after wards.Careful with sandblasting and welding. . .make sure that you are using a blasting media that will not introduce contaminants into the weld or make sure that there isn't any blasting media embedded in the base metal. . .your welds will end up contaminated and will be the starting point/catalyst for cracking and porosity. . .
The big thing about cleaning the material before welding how good it welds when it is clean and penetration. When you leave it uncleaned there can be impurities in the scale that covers it and it will not usually weld very nice. The other thing is it's just another layer of junk you have to penetrate through before the pure material. So it can inhibit penetration.Just out of curiosity, what happens if you dont clean DOM tubing before welding? Is it that big of a deal?