I also found some interesting comments of a scientific nature about the 'high nickel' 010-020 claims on speedtalk. Here, a member actually tested a sample of metal from a 509 010-020 block and found no such 'high nickel' content-
Here is the thread -
http://www.speedtalk.com/forum/viewt...hp?f=1&t=20092
Interesting for sure.