ASTM A 645 Grade B Structural and constructional steels
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ASTM A 645 Grade B 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 B Physical Properties
Temperature
This material has 65 properties — only a subset is shown here.
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ASTM A 645 Grade B Heat Treatments
- Hardening - The plates shall be heated to a temperature within the range from 800 to 870°C [1470 to 1600°F], held within that temperature range for a sufficient time to obtain uniform temperature throughout the plate thickness, and then quenched in a liquid medium.
Intermediate Heat Treatment - The plates shall be reheated to a temperature within the range from 650 to 720°C [1200 to 1330°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] for nominal plate thicknesses over 16 mm [5/8 in.], or cooled in air or water-quenched to below 150°C [300°F] for nominal plate thicknesses of 16 mm [5/8 in.] and under.
Tempering - The plates shall be reheated to a temperature within the range from 550 to 620°C [1020 to 1150°F], held within that temperature range for a minimum of 1.2 min/mm [30 min/in.] of thickness, but in no case less than 15 min, and then water-quenched to below 150°C [300°F].
ASTM A 645 Grade B Mechanical Properties
Temperature
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ASTM A 645 Grade B International Equivalent Materials
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- 1Cross References
- 10Composition
- 15Mechanical Properties
- 3Physical Properties
- 1Heat Treatment
- -Metallography
- -Machinability
- -Stress-Strain
- -Formability
- -Fatigue
- -Fracture
- -Creep
- 1Joints
- -Coatings
- 34Dimensions
- -Tribology
- -Corrosion
- -Ageing
- -Weatherability
- -Irradiation
- -Total Suppliers