ASTM A 940/A940M : 2006 : R2011
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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Standard Specification for Vacuum Treated Steel Forgings, Alloy, Differentially Heat Treated, for Turbine Rotors
Hardcopy , PDF
11-11-2014
English
01-04-2011
Important note : Users cannot be edited or removed once added to your Multi user PDF.CONTAINED IN VOL. 01.05, 2017 Defines vacuum treated, alloy steel forgings, differentially heat treated for turbine rotors.
| Committee |
A 01
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| DevelopmentNote |
Supersedes ASTM A 940 (03/2006)
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| DocumentType |
Standard
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| Pages |
4
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| ProductNote |
Reconfirmed 2011
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| PublisherName |
American Society for Testing and Materials
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| Status |
Superseded
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| SupersededBy | |
| Supersedes |
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 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.
| ASTM A 418/A418M : 2015 : REDLINE | Standard Practice for Ultrasonic Examination of Turbine and Generator Steel Rotor Forgings |
| ASTM A 275/A275M : 2015-05 | PRACTICE FOR MAGNETIC PARTICLE EXAMINATION OF STEEL FORGINGS |
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