ASTM A 278 Class 275 Cast irons
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ASTM A 278 Class 275 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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ASTM A 278 Class 275 Heat Treatments
- Castings intended for use above 230°C (450°F): stress-relieved in a suitable furnace at a temperature not exceeding 205°C (400°F), heating uniformly to 565 - 650°C (1050 -1200°F), minimum 2 h, maximum 12 h. The heating and cooling rates shall be uniform and shall not be more than 222°C/h (400°F/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.
Castings intended for use bellow 230°C (450 °F): either heat treatment as above specified either cooled in the mold to 250°C (480°F) at an average rate of not more than 50°C/h (90°F/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 275 Mechanical Properties
Temperature
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ASTM A 278 Class 275 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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- 34Cross References
- 3Composition
- 1Mechanical Properties
- -Physical Properties
- 1Heat Treatment
- -Metallography
- -Machinability
- -Stress-Strain
- -Formability
- -Fatigue
- -Fracture
- -Creep
- -Joints
- -Coatings
- -Dimensions
- -Tribology
- -Corrosion
- -Ageing
- -Weatherability
- -Irradiation
- -Total Suppliers