ASTM A 940 : 1996
Superseded
View Superseded by
Standard Specification for Vacuum Treated Steel Forgings, Alloy, Differentially Heat Treated, for Turbine Rotors
English
12-31-2010
11-11-2014
CONTAINED IN VOL. 01.05, 2005 Refers to alloy steel forgings for turbine rotors, vacuum treated, and differentially heat treated.
| Committee |
A 01
|
| DocumentType |
Standard
|
| Pages |
4
|
| PublisherName |
American Society for Testing and Materials
|
| Status |
Superseded
|
| SupersededBy |
1.1 This specification covers vacuum treated, alloy steel forgings, differentially heat treated for turbine rotors.
1.2 Differential heat treatment of a rotor forging involves subjecting two portions of the forging concurrently to two different austenitizing temperatures followed by two different cooling rates for normalizing and quenching, and then tempering, to achieve creep resistance in the high pressure (HP) portion and high toughness in the low pressure (LP) portion.
1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
| ASTM A 275/A275M : 2015-05 | PRACTICE FOR MAGNETIC PARTICLE EXAMINATION OF STEEL FORGINGS |
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