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ASTM A891/A891M-08

Historical Revision

Standard Specification for Precipitation Hardening Iron Base Superalloy Forgings for Turbine Rotor Disks and Wheels

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1.1 This specification covers precipitation hardening iron base superalloy forgings which are primarily intended for use as turbine rotor disks and wheels.

1.2 Two heat treatments are covered. Selection will depend upon design, service conditions, mechanical properties, and elevated temperature characteristics.

1.3 All of the provisions of Specification A 788/A 788M, apply, except as amended herein.

1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.


This specification covers precipitation hardened iron base superalloy forgings which are primarily intended for use as turbine rotor disks and wheels. Two heat treatments are covered and selection will depend upon design, service conditions, mechanical properties, and elevated temperature characteristics. The material shall be made by vacuum melting followed by consumable electrode vacuum arc or electroslag remelting. The forgings shall undergo the following tests: tension test, hardness test, stress rupture test, and creep test. Also, the forgings shall be subjected to non-destructive examinations like ultrasonic examination and liquid penetrant examination. The forgings shall be uniform in quality and condition, clean, sound, and free of cracks, seams, laps, shrinkage, and other injurious imperfections.


SDO ASTM: ASTM International
Document Number A891
Publication Date March 1, 2008
Language en - English
Page Count 3
Revision Level 08
Supercedes
Committee A01.06
Publish Date Document Id Type View
Oct. 15, 2024 A0891_A0891M-24 Revision
May 1, 2016 A0891_A0891M-16 Revision
Nov. 1, 2010 A0891_A0891M-10 Revision
March 1, 2008 A0891_A0891M-08 Revision
May 1, 2007 A0891_A0891M-07 Revision
March 1, 2021 A0891_A0891M-16R21 Reaffirmation
March 1, 2015 A0891_A0891M-10R15 Reaffirmation