ASTM A940/A940M-06(2016)
Standard Specification for Vacuum Treated Steel Forgings, Alloy, Differentially Heat Treated, for Turbine Rotors
- Standard No.
- ASTM A940/A940M-06(2016)
- Release Date
- 2006
- Published By
- American Society for Testing and Materials (ASTM)
- Latest
- ASTM A940/A940M-06(2016)
- 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.
ASTM A940/A940M-06(2016) Referenced Document
- ASTM A275/A275M Standard Test Method for Magnetic Particle Examination of Steel Forgings
- ASTM A370 Standard Test Methods and Definitions for Mechanical Testing of Steel Products
- ASTM A418/A418M Standard Practice for Ultrasonic Examination of Turbine and Generator Steel Rotor Forgings
- ASTM A470/A470M Standard Specification for Vacuum-Treated Carbon and Alloy Steel Forgings for Turbine Rotors and Shafts
- ASTM A472/A472M Standard Specification for Heat Stability of Steam Turbine Shafts and Rotor Forgings
- ASTM A788/A788M Standard Specification for Steel Forgings, General Requirements
- ASTM E139 Standard Test Methods for Conducting Creep, Creep-Rupture, and Stress-Rupture Tests of Metallic Materials
ASTM A940/A940M-06(2016) history
- 2006 ASTM A940/A940M-06(2016) Standard Specification for Vacuum Treated Steel Forgings, Alloy, Differentially Heat Treated, for Turbine Rotors
- 2006 ASTM A940/A940M-06(2011) Standard Specification for Vacuum Treated Steel Forgings, Alloy, Differentially Heat Treated, for Turbine Rotors
- 2006 ASTM A940/A940M-06 Standard Specification for Vacuum Treated Steel Forgings, Alloy, Differentially Heat Treated, for Turbine Rotors
- 1996 ASTM A940-96(2001) Standard Specification for Vacuum Treated Steel Forgings, Alloy, Differentially Heat Treated, for Turbine Rotors
- 1996 ASTM A940-96 Standard Specification for Vacuum Treated Steel Forgings, Alloy, Differentially Heat Treated, for Turbine Rotors
