ASTM A 471 Class4 Structural and constructional steels
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ASTM A 471 Class4 Chemical Composition
A471/A471M: 2019 / Standard Specification for Vacuum-Treated Alloy Steel Forgings for Turbine Rotor Disks and Wheels
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ASTM A 471 Class4 Physical Properties
Temperature
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ASTM A 471 Class4 Heat Treatments
- Preliminary heat treatment:The forgings shall be given such preliminary heat treatment as is proper for the design and composition. The forgings shall be heated to a suitable temperature for a sufficient length of time for complete austenitization and shall be suitably cooled to bring about complete transformation.
Heat treatment for mechanical properties: Reheating to a temperature above the upper critical temperature, holding for a sufficient length of time for complete austenitization, and liquid quenched.
Tempering: Final tempering temperature shall be not less than 595°C (1100°F), cooling under suitable conditions from the tempering temperature.
Stress relieving: Forgings shall be stress relieved after machining by heating slowly to a temperature within 55°C (100°F) below the final tempering temperature but in no case below 550°C (1025°F). Holding for sufficient length of time and cooling under suitable conditions.
ASTM A 471 Class4 Mechanical Properties
Temperature
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ASTM A 471 Class4 International Equivalent Materials
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- 6Cross References
- 11Composition
- 33Mechanical Properties
- 3Physical Properties
- 1Heat Treatment
- -Metallography
- -Machinability
- -Stress-Strain
- -Formability
- -Fatigue
- -Fracture
- -Creep
- -Joints
- -Coatings
- -Dimensions
- -Tribology
- -Corrosion
- -Ageing
- -Weatherability
- -Irradiation
- -Total Suppliers