A rush job came in the shop the other day. It was a part made from 4130 chromoly and it was 1-1/4" thick. while thin wall 4130 tubing can be tig welded without a preheat or post heat treatment, ...Thick 4130 requires a preheat in order to avoid hard and brittle areas. Preheating slows the cooling rate and drives off moisture and is needed for high strength low allow steels like 4130 and 4140 in order to avoid cracking and hard brittle zones. | Welding Tips & Tricks

34K views · 672 reactions | 4130 chromoly is a common material in racing applications. Miller motorsports manager Andy Weyenberg takes you through the process of welding 4130 chromoly tubing from start to finish, plus some tips and tricks. | Miller Welders | Facebook

68K views · 287 reactions | Are you working on a project welding 4130 chromoly tube? Don't miss these tips on fitup, proper filler metal, techniques and more for this temperature-sensitive material. bit.ly/3swBtUS | Miller Welders | Facebook

222K views · 2K reactions | @Cirizawelding  Educational Welding Tip:...

"Check out this incredible arc shot of the gas tungsten arc welding process on a stainless steel butt weld! Here, I’m using the back feeding technique for the root pass while walking the cup. The filler rod is perfectly positioned below the bevel edges, with argon backing gas flowing smoothly. Notice how uniform and precise the arc is, giving me full control over the weld puddle and fusing both bevel edges, while also reinforcing the inner side of the weld joint. Lincoln Electric Aspect® 230 AC/