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ASTM A940/A940M

Standard Specification for Vacuum Treated Steel Forgings, Alloy, Differentially Heat Treated, for Turbine Rotors

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Organization: ASTM
Publication Date: 1 March 2006
Status: inactive
Page Count: 4
ICS Code (Iron and steel forgings): 77.140.85
scope:

This specification covers vacuum treated, alloy steel forgings, differentially heat treated for turbine rotors.

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.2

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.

Document History

March 1, 2006
Standard Specification for Vacuum Treated Steel Forgings, Alloy, Differentially Heat Treated, for Turbine Rotors
This specification covers vacuum treated, alloy steel forgings, differentially heat treated for turbine rotors. Differential heat treatment of a rotor forging involves subjecting two portions of the...
March 1, 2006
Standard Specification for Vacuum Treated Steel Forgings, Alloy, Differentially Heat Treated, for Turbine Rotors
This specification covers vacuum treated, alloy steel forgings, differentially heat treated for turbine rotors. Differential heat treatment of a rotor forging involves subjecting two portions of the...
ASTM A940/A940M
March 1, 2006
Standard Specification for Vacuum Treated Steel Forgings, Alloy, Differentially Heat Treated, for Turbine Rotors
This specification covers vacuum treated, alloy steel forgings, differentially heat treated for turbine rotors. Differential heat treatment of a rotor forging involves subjecting two portions of the...
September 10, 1996
Standard Specification for Vacuum Treated Steel Forgings, Alloy, Differentially Heat Treated, for Turbine Rotors
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...
September 10, 1996
Standard Specification for Vacuum Treated Steel Forgings, Alloy, Differentially Heat Treated, for Turbine Rotors
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...
July 15, 1995
Standard Specification for Vacuum Treated Steel Forgings, Alloy, Differentially Heat Treated, for Turbine Rotors
A description is not available for this item.

References

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