Looking for a good Filler Rod Selection guide (something online). Will be joining 3 disimilar ss metals, those being; 409, 439 & 18CrCb, in a 3 ply weld. My guess would be to use a 409 or maybe a 309 rod but would like to see what is recommended. Cant find alot of imformation about 18CrCb.
Thanks
kam