ASTM A 645 Grade A Structural and constructional steels
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ASTM A 645 Grade A Chemical Composition
A645/A645M: 2010 / Pressure Vessel Plates, 5 % and 5 1⁄2 % Nickel Alloy Steels, Specially Heat Treated
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ASTM A 645 Grade A Physical Properties
Temperature
This material has 68 properties — only a subset is shown here.
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ASTM A 645 Grade A Heat Treatments
- Hardening- The plates shall be heated to a temperature within the range from 855 to 915°C [1575 to 1675°F], held within that temperature range for a minimum of 2.4 min/mm [1 h/in.] of thickness, but in no case less than 15 min, and then water-quenched to below 150°C [300°F].
Intermediate Heat Treatment - The plates shall be reheated to a temperature within the range from 690 to 760°C [1275 to 1400°F], held within that temperature range for a minimum of 2.4 min/mm [1 h/in.] of thickness, but in no case less than 15 min, and then water-quenched to below 150°C [300°F].
Tempering - The plates shall be reheated to a temperature within the range from 620 to 665°C [1150 to 1225°F], held within that temperature range for a minimum of 2.4 min/mm [1 h/in.] of thickness, but in no case less than 15 min, and then water-quenched or air cooled to below 150°C [300°F].
ASTM A 645 Grade A Mechanical Properties
Temperature
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ASTM A 645 Grade A International Equivalent Materials
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- 4Cross References
- 9Composition
- 15Mechanical Properties
- 3Physical Properties
- 1Heat Treatment
- -Metallography
- -Machinability
- -Stress-Strain
- -Formability
- -Fatigue
- -Fracture
- -Creep
- 1Joints
- -Coatings
- 34Dimensions
- -Tribology
- -Corrosion
- -Ageing
- -Weatherability
- -Irradiation
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