Work Item
ASTM WK88281

Revision of B805-23 Standard Specification for Precipitation Hardening Nickel Alloys Bar and Wire

Rationale

Precipitation-hardened alloys used in offshore oil and gas completion equipment are prone to hydrogen embrittlement in seawater plus cathodic protection conditions. Using slow strain rate testing (SSRT), it has been determined that by restricting the titanium content to less than 1.3 wt %, the hydrogen embrittlement resistance more than doubles as measured on the NACE TM0198 Method C test. For end users to specify this restricted composition, a new UNS number has been requested by oil & gas producers so that the alloy can be dual-certified.

Details

Developed by Subcommittee: B02.07

Committee: B02

Staff Manager: Jennifer Tursi

Work Item Status

Date Initiated: 10-30-2023

Technical Contact: William MacDonald