ABS AB/2 Cast steels
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ABS AB/2 Chemical Composition
Rules for Materials and Welding, Part 2; Chapter 3 Section 7; Materials for Machinery, Boilers, Pressure Vessels, and Piping; Steel Machinery Forgings, American Bureau of Shipping, 2021
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ABS AB/2 Physical Properties
Temperature
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ABS AB/2 Heat Treatments
- Annealing: Forgings are to be reheated to and held at the proper austenitizing temperature for a sufficient time to effect the desired transformation and then be allowed to cool slowly and evenly in the furnace until the temperature has fallen to about 455°C (850°F) or lower.
Normalizing: Forgings are to be reheated to and held at the proper temperature above the transformation range for a sufficient time to effect the desired transformation and then withdrawn from the furnace and allowed to cool in air.
Tempering: Forgings are to be reheated to and held at the proper temperature, which will be below the transformation range, and are then to be cooled under suitable conditions. The tempering temperature is not to be less than 550°C (1022°F). - Castings are to be either fully annealed, normalized or normalized and tempered in a furnace of sample proportions to bring the whole casting to uniform temperature above the transformation range on the annealing or normalizing cycle. The furnaces are to be maintained and have adequate means for control and recording temperature. Castings are to be held soaking at the proper temperature for at least a length of time equivalent to 1 h/25.5 mm of thickness of the heaviest member.
No annealed casting is to be removed from the furnace until the temperature of the entire furnace charge has fallen to or below a temperature of 455°C (850°F). A sufficient number of thermocouples are to be connected to the furnace charge to measure and record that its temperature is adequately uniform, unless the temperature uniformity of the furnace can be verified at regular intervals.
Tempering is to be carried out at a temperature of not less than 550°C (1022°F).
ABS AB/2 Mechanical Properties
Temperature
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ABS AB/2 International Equivalent Materials
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Equivalence categories reflect chemical-composition and mechanical-property comparison — always verify suitability against the governing specification for your application.
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