Removing a broke off thread

[Frank S]

Nice combination of Blue Wrench and Percussive Maintenance!

Bill

Yes, in this case the blue wrench was in the form of duel shield flux cored wire. When something is broken off as deep as that one was, on top of being a tapered thread hydraulically torqued, welding them out is usually the fastest option. Not only does the welding allow you to build up to surface so you can attach a means of twisting it, but the heat from the welding causes expansion and the gradual cooling contraction. You never want to quench or rapid cool because it will make things brittle . The filler wire I use has nearly 90,000 lb tensile strength, but for times when that is not enough I have some stick electrodes that have a 250,000 PSI yield