NORMA ASTM A48

Standard Specification for Gray Iron Castings

Castings ordered and produced in accordance with this specification are classified into a number of grades based on the properties of separately cast test bars (Table 1, Table 2). Each class is designated by a number followed by a letter. The number indicates the minimum tensile strength of the separately cast test bar, and the letter indicates the size of the test bar. Examples of proper designations are as follows:
  • Gray Iron Castings, ASTM Specification A 48, Class 30B.
  • Gray Iron Castings, ASTM Specification A 48, Class 40C.

1. Scope
2. Referenced Documents
3. Terminology
4. Classification
5. Ordering Information
6. Special Requirements

  • Requirements for Tensile Strength of Gray Cast Irons in Separately Cast Test Bars (Inch-Pound)
  • Requirements for Tensile Strength of Gray Cast Irons in Separately Cast Test Bars (Metric)

7. Tensile Requirements
8. Dimensional Requirements
9. Workmanship and Finish
10. Sampling

  • Separately Cast Test Bars for Use When a Specific
  • Correlation Has Not Been Established Between the Test Bar and the Casting

11. Cast Test Bars
12. Number of Tests and Retests
13. Tension Test Specimens
14. Tension Test
15. Inspection

Diameters and Lengths of Cast Test Bars

16. Rejection and Resubmission
17. Certification
18. Product Marking

Suitable Design and Dimensions for Mold for Separately Cast Cylindrical Test Bars for Gray Iron

19. Preparation for Delivery

MECHANICAL PROPERTIES OF CASTINGS

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