ASTM A473:17 pdf download

ASTM A473:17 pdf download.Standard Specification for Stainless Steel Forgings.
7. Chemical Composition
7. 1 The steel shall conform to the requirements for chemical composition specified in Table 1.
7.2 Methods and practices relating to chemical analysis required by this specification shall be in accordance with Test Methods, Practices, and Terminology A75 1.
8. Mechanical Properties Requirements
8. 1 The material shall conform to the room temperature mechanical requirements specified in Table 2.
8.2 Instead of tension tests, hardness requirements, in accordance with Table 2, may he specified by the purchaser for the ferritic and the martensitic steels.
8.3 The martensitic grades shall he capable of meeting the hardness requirements, after heat treating, as specified in Table
9. Magnetic Permeability
9.1 When required by the purchase order, the magnetic permeability of Types 201 and 205 in the annealed condition shall not exceed 1.2 as tested by a Severn-type indicator.
10. Prolongations for Tests
10.1 Subject to Sections 11 and 12, the forgings shall he produced with prolongations for testing, unless otherwise specified. The producer may elect to submit an extra forging to represent each test lot instead of prolongations, or the test specimens can be taken from the forgings themselves.
11. Number of Tests
11.1 For all classes of forgings weighing from 5000 to
7000 lb (2270 to 3180 kg) each, at least one tension test shall be made from each forging. Also, one magnetic permeability test must be made when specified on the customer order.
11.2 For all classes of forgings weighing more than 7000 lb each, one tension test shall be made from each end of each forging. In the case of ring forgings, the tension test specimen shall be removed from each of two locations on the periphery, approximately 180° apart, or insofar as practicable from opposite ends of the forging. Also, one magnetic permeability test must he made when specified on the customer order.
11.3 For forgings weighing less than 5(X)O lb each, one tension test shall be made from each size classification for each heat in each heat-treating charge. When the heat-treating cycles are the same and the furnaces (either batch or continuous type) are controlled within ±25 °F (± 14 °C) and equipped with recording pyrometers so that complete records of heat treatment are available, then only one tension test from each heat of each size classification is required. Also, one magnetic permeability test must be made when specified on the customer order.
12. Test Specimens
12.1 Tension test specimens shall be taken from the test prolongations or from the forgings as provided in Section 10.
12.2 Depending upon the method of forging, test specimens shall be procured as follows, unless otherwise specified.