tantalum arc torch

so I was practicing some stainless steel welding using some scraps I found in the steel drawer.  Some of the triangle pieces I found wouldn't make good welds, no matter what I tried.  I started asking around, and someone recoginized the shape as tantalum.  Tantalum has a pretty high melting point, so I'm thinking of trying a tantalum arc torch.  It's not as high as carbon, but it might have better thermal conductivity.  I suspect it might react, but hopefully that won't reduce conductivity.  I'll let you know how it works out once I try.