ASTM-A940/A940M 2016
$35.75
A940/A940M-06(2016) Standard Specification for Vacuum Treated Steel Forgings, Alloy, Differentially Heat Treated, for Turbine Rotors
| Published By | Publication Date | Number of Pages |
| ASTM | 2016 | 4 |
ASTM A940/A940M-06-Reapproved2016
Withdrawn Standard: Standard Specification for Vacuum Treated Steel Forgings, Alloy, Differentially Heat Treated, for Turbine Rotors (Withdrawn 2017)
ASTM A940/A940M
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.2
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.
Keywords
differential heat treatment; steel forgings; turbine rotor; vacuum treated steel;
ICS Code
ICS Number Code 77.140.85 (Iron and steel forgings)
DOI: 10.1520/A0940_A0940M-06R16
