ASTM A 278 Class 40 Cast irons
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ASTM A 278 Class 40 Chemical Composition
A278/A278M: 2001 / Standard Specification for Gray Iron Castings for Pressure-Containing Parts for Temperatures Up to 650°F (350°C)
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This material has 41 properties — only a subset is shown here.
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ASTM A 278 Class 40 Heat Treatments
- For use above 230°C: Stress-relieved in a suitable furnace at a temperature not exceeding 200°C, heating uniformly 565 - 650°C (2 - 12 h). The heating and cooling rates shall be uniform and shall not be more than 250°C/h for castings of 25 mm max. section. For heavier sections the maximum heating and cooling rates in C°/h shall be 205 divided by the maximum section thickness. For use below 230°C: either heat treatment as above either cooled in the mold to 250°C at an average rate of not more than 50°C/h for castings up to 25 mm in section; For heavier sections the maximum cooling rate in degrees C°/h shall be 1250 divided by the maximum section thickness.
ASTM A 278 Class 40 Mechanical Properties
Temperature
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34 Cross References
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3 Composition
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1 Mechanical Properties
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- Physical Properties
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1 Heat Treatment
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- Metallography
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- Machinability
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- Stress-Strain
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- Formability
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- Fatigue
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- Fracture
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2 Creep
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- Joints
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- Coatings
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- Dimensions
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- Tribology
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- Corrosion
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- Ageing
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