ASTM A479/A479M-20 pdf free download.Standard Specification for Stainless Steel Bars and Shapes for Use in Boilers and Other Pressure Vessels.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents: therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
1.3 Unless the order specifies the applicable M” specitication designation, the material shall be furnished to the inch- pound units.
5. Chemical Composition
5. I Chemical composition shall be reported to the purchaser, or his representative, and shall conform to 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/A44M 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.
6.1 All austenhtic grades shall be tested for average grain Si7C by Test Methods E112.
6.2 The H grades shall conform to an average grain site as tol lows:
6.2.1 ASTM No. 6 or coarser for Types 30411, 309H. 31 OH, and 316H. and
6.2.2 ASTM No. 7 or coarser for Types 321H. 347H. and 3481-1.
6.3 For S32615, the grain size as determined in accordance with Test Methods [ 112. comparison method, Plate 11, shall be No. 3 or finer.
6.4 For N08810 and N088l I. the average grain sue as determined in accordance with Test Methods El 12 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 Ti.
7. Mechanical Properties Requirenient.s
7. I The material shall conform 10 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 from at least one bar or shape from each lot
of material.
7.2 The yield strength shall be determined by the ofiset (0.2 %) method as prescribed in Test Methods and Definitions
A370.
7.3 Marwnsitic 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 o1 the cross section.
7.5 Martensitic grades shall be capable of meeting the hardness requirements after heat treating as specified in Table
3.ASTM A479/A479M pdf download.