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Standard Specification for Vacuum Treated Steel Forgings, Alloy, Differentially Heat Treated, for Turbine Rotors
STANDARD published on 1.3.2006
Designation standards: ASTM A940/A940M-06
Note: WITHDRAWN
Publication date standards: 1.3.2006
SKU: NS-4907
The number of pages: 4
Approximate weight : 12 g (0.03 lbs)
Country: American technical standard
Category: Technical standards ASTM
Keywords:
differential heat treatment, steel forgings, turbine rotor, vacuum treated steel, ICS Number Code 77.140.85 (Iron and steel forgings)
1. Scope | ||||||||||||||
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. |
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2. Referenced Documents | ||||||||||||||
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