Work Item
ASTM WK77186

New Specification for Additive Manufacturing -- Finished Part Properties -- Specification for Niobium-Hafnium Alloy UNS R04295 via Laser Beam Powder Bed Fusion for Spaceflight Applications

1. Scope

1.1 This specification covers additive manufacturing of parts manufactured via laser beam powder bed fusion (PBF-LB) processing of niobium-hafnium alloy used in spaceflight applications. Parts made using this processing method are typically used in applications that require mechanical properties similar to wrought products. Products built to this specification may require additional post-processing in the form of machining, polishing etc. to meet necessary surface finish and dimensional tolerances. 1.2 This specification is intended for the use of purchasers or producers, or both, of PBF-LB R04295 parts for defining the requirements based on classification methodology. 1.3 Users are advised to use this specification as a basis for obtaining parts that will meet the minimum acceptance requirements established and revised by consensus of committee members. 1.4 User requirements considered more stringent may be met by the addition to the purchase order. 1.5 UnitsThe values stated in SI units are to be regarded as the standard. Other units are included only for informational purposes.


additive manufacturing; powder bed fusion; niobium, PBF-LB


No such standard presently exists.

The title and scope are in draft form and are under development within this ASTM Committee.


Developed by Subcommittee: F42.07

Committee: F42

Staff Manager: Pat Picariello

Work Item Status

Date Initiated: 06-03-2021

Technical Contact: Charles Nostedt

Item: 004

Ballot: F42 (23-01)

Status: In Balloting