One might contact the suppliers of this alloy, either CRS Holdings, a subsidiary of Carpenter Technologies (Cartech), or Teledyne (Allvac), subsidiary of Allegheny Technologies.
ASM International has a number of good textbooks - e.g. Heat Resistant Materials, which is one of the classics on superalloys and conventional high temperature materials, i.e. Fe, Ni, Cr, Co based alloys. I actually have this book, and I highly recommend it.