I do like questions like this – they remind me of why I became a metallurgist. Normally I am looking at nineteenth century and earlier but I do occasionally have requests like this.
The key question is, do you have one or more examples of the original components or are you just dealing with documents? If the former, then a sample, SEM or microprobe analysis, optical metallography and a hardness test will answer your questions for a much smaller outlay than the staff time spent in searching archives. It will also enable you to estimate whether it matches any current spec. Of course, it may not match any spec. of the period either; the guy on the foundry floor might have had his own ideas, whatever management said.
ASM International is the world's largest association of materials-centric engineers and scientists. We are dedicated to informing, educating, and connecting the materials community to solve problems and stimulate innovation around the world.
ASM World Headquarters9639 Kinsman RoadMaterials Park, OH 44073-0002
+1 440.462.0292 (International)