I'm still working on figuring out how to reliably join carbide to steel. I found a vendor that recommended 56% silver was the way to go and having cadmium in it would be even better except for the health risks. He could supply either but for now, I ordered the no cadmium solder.
I read did the wiki on cadmium and it didn't seem like something I want around me but like many things I wonder if the warnings match up with the actual likely hood of a real health risk.
I worked for a company that made asbestos once which while it isn't good stuff health wise, I am fairly sure most plaintiffs were not harmed to the degree claimed so color me skeptical about some warnings.
Wes S