ASME SA-479:2019 pdf free download – Standard Specification for Stainless Steel Bars and Shapes for Use in Boilers and Other Pressure Vessels
1.1 This specification covers hot- and cold-finished bars of stainless steel, including rounds, squares, and hexagons, and hot-rolled or extruded shapes such as angles, tees, and channels for use in boiler and pressure vessel construction. 2 NOTE 1—There are standards covering high nickel, chromium, auste- nitic corrosion, and heat-resisting alloy materials. These standards are under the jurisdiction ofASTM Subcommittee B02.07 and may be found in Annual Book ofASTM Standards, Vol 02.04.
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” specifica- tion designation, the material shall be furnished to the inch- pound units.
4.1 In addition to the requirements of this specification, all requirements of the current editions of Specification A484/ A484M shall apply. Failure to comply with the general requirements of Specification A484/A484M constitutes non- conformance with this specification.
7.1 The material shall conform to the mechanical property requirements specified in Table 2 for the grade ordered. At least one room-temperature test shall be performed by the manufac- turer 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 offset (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
9.1 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. NOTE 2—Many, if not all, duplex stainless steels and some austenitic stainless steels will form intermetallic phases or compounds such as sigma, chi, and laves phases when exposed to temperatures below the specified annealing temperature or cooled slowly from a higher tempera- ture during casting, welding, or annealing. These phases can have a negative effect on mechanical properties and corrosion resistance. These phases can typically be removed by correct annealing and cooling practices. The presence of these phases can be demonstrated by tests, typically involving metallography, impact toughness, or corrosion resistance, although the testing requirements may be different for different alloy grades. Such testing may or may not be routinely performed by the manufacturer.
10. Certification
10.1 The material manufacturer’s certificate of compliance certifying that the material was manufactured and tested in accordance with this specification, together with a report ofthe results required by this specification and the purchase order, shall be furnished at the time of shipment. The certification shall be positively relatable to the lot of material represented.