Standard Speciﬁcation for Vacuum-Treated Carbon and Alloy Steel Forgings for Turbine Rotors and Shafts1

This popular is issued underneath the ﬁxed designation a 470; the quantity at once following the designation suggests the 12 months of unique adoption or, inside the case of revision, the year of remaining revision. More than a few in parentheses shows the 12 months of remaining reapproval. A superscript epsilon (e) suggests an editorial alternate because of the remaining revision or reapproval.
This well-known has been authorized for use by means of organizations of the branch of protection.