Work Item
ASTM WK78469

Revision of A705/A705M-20e1 Standard Specification for Age-Hardening Stainless Steel Forgings


None Provided


Initially it was very time consuming to analyze Nb (Cb) separately from Ta so the two elements were included together in the stainless steel stds. Nb (Cb) was always the key element associated with obtaining properties. With more advance chemical analysis methods this distinction is no longer an issue. As Ta is a risk of being a Conflict Mineral and therefore a banned substance, ASTM has been removing Ta from its standards where it has been included in combination with Nb (Cb). This ballot seeks to undertake that in this standard.


Developed by Subcommittee: A01.17

Committee: A01

Staff Manager: W Scott Orthey

Work Item Status

Date Initiated: 10-01-2021

Technical Contact: Alex Monsour