ASTM A479/A479M-2020 pdf free download.Standard Specification for Stainless Steel Bars and Shapes for Use in Boilers and Other Pressure Vessels.
5. Chemical Composition
5.1 Chemical composition shall be reported to the purchaser. or his representative, and shall conform o the requirements specified in Table I.
5.2 When a product analysis is performed or requested by the purchaser. the tolerance limits as described in Specification A44/A484M apply unless Supplementary Requirement S3 is invoked.
5.3 Methods and practices relating to chemical analysis required by this specification shall be in accordance with Test Methods. Practices, and Terminology A75 I.
6. (;rdin Size for Auslenitic (;radt
6.1 All austenitic grades shall be tested for average grain size by Test Methods F 112.
6.2 The H grades shall conform to an average grain size as follows:
6.2.1 ASTM No.6 or coarser for Types 30411. 30911. 310H. and 31611. and
6.2.2 ASTM No. 7 or coarscr for Types 321H. 347H. and
34XH
6.3 For S326l5. the grain size as determined in accordance with Tcst Methods El 12. comparison method. Plate II. shall be No. 3 or finer.
6.4 For N088l0 and N088l I. the average grain size as determined in accordance with Test Methods E112 shall be No. 5 or coarser.
6.5 Supplementary Requirement SI shall be invoked when non-H grade austenitic stainless steels are ordered for ASME Code applications for service above 1000 °F 1540 °C1.
7. Medianical Properties Requirements
7.1 The material shall conlorm to the mechanical property requirements specified in Table 2 for the grade ordered. At least one room-temperature test shall be performed by the manufacturer on a sample froni at least one bar or shape from each lot of material.
7.2 The yield strength shall be determined by the otrset (0.2 %) method as prescribed in Test Methods and Definitions A370.
7.3 Martensitic material supplied in the annealed condition shall be capable of meeting the hardened and tempered mechanical properties when heat treated.
7.4 Hardness measurements, when required, shall be made at a location midway between the surface and the center of the cross section.
7.5 Martensitic grades shall be capable of meeting the hardness requirements after heat treating as specified in Table 3.
8. Testing for Intermetallic Compounds
8.1 When specified by the purchaser in the purchase order, the manufacturer shall test the austenitic or austenitic ferritic (duplex) stainless steel material in its final condition in accordance with supplementary test requirements S6.ASTM A479/A479M pdf download.