What's the catch? Weldability...? I've just been chatting with a mech-eng materials specialist friend of mine, and according to him, you hit it, right there; h

What's the catch? Weldability...? I've just been chatting with a mech-eng materials specialist friend of mine, and according to him, you hit it, right there; he writes hot work will cause the microstructure to revert to classic regular BCC ferrite which isn't that impressive. that's the reason why you can't / shouldn't weld the stuff... ...essentially it's a "cast/quench this part and leave it the hell alone" material.