The corrugated tubing itself is made of very thin wall stainless steel. I blew a hole in mine when I was heating it with a torch to remove it. I just welded the hole back up before I reinstalled it. Can you take a picture of what degree of mangled-ness you’re working with on yours? Some more repair ideas might be discovered if we can see it.
I will try and get a photo of the damage later but essentially the previous owners didn’t pay attention to the tube while tightening the JIC/ Flare nut and twisted the tube, which ripped a hole in it. In order for me to “clean up the mess” I had to cut a 3” section of the tubing out to get back to good round tube.