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ASTM A789-2018 pdf free download

ASTM A789-2018 pdf free download.Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Tubing for General Service
1. Scope
1.1 This specification 2 covers grades of average wall thickness, or, if specified on the order, minimum wall thickness, of stainless steel tubing for services requiring general corrosion resistance, with particular emphasis on resistance to stress corrosion cracking. These steels are suscep- tible to embrittlement if used for prolonged periods at elevated temperatures. 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. Within the text, the SI units are shown in brackets. The inch-pound units shall apply unless the M designation of this specification is specified in the order. 1.3 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
3. Ordering Information
3.1 Orders for product under this specification should in- clude the following, as required, to describe the desired material adequately: 3.1.1 Quantity (feet, metres, or number of lengths), 3.1.2 Name of product (seamless or welded tubes), 3.1.3 Grade (see Table 1), 3.1.4 Size (outside diameter and average wall thickness, unless minimum wall thickness is specified), 3.1.5 Length (specific or random), 3.1.6 Optional requirements (for product analysis, see Sec- tion 8; for hydrostatic or nondestructive electric test, see Section 10), 3.1.7 Test report required (see the Inspection section of Specification A1016/A1016M), 3.1.8 Specification designation, and 3.1.9 Special requirements.
4. General Requirements
4.1 Product furnished under this specification shall conform to the applicable requirements of Specification A1016/ A1016M, unless otherwise provided herein.
5. Manufacture
5.1 The tubes shall be made by the seamless or welded process with no filler metal added.
6. Heat Treatment
6.1 All tubes shall be furnished in the heat-treated condition in accordance with the procedures shown in Table 2. For seamless tubes, as an alternate to final heat treatment in a continuous furnace or batch-type furnace, immediately follow- ing hot forming while the temperature of the tubes is not less than the specified minimum solution treatment temperature, tubes may be individually quenched in water or rapidly cooled by other means.
8. Product Analysis
8.1 An analysis of either one billet or one length of flat-rolled stock or one tube shall be made from each heat. The chemical composition thus determined shall conform to the requirements specified. 8.2 A product analysis tolerance (see the annex table on Chemical Requirements (Product Analysis Tolerances) in Specification A480/A480M) shall apply. The product analysis tolerance is not applicable to the carbon content for material with a specified maximum carbon of 0.04 % or less. 8.3 If the original test for product analysis fails, retests of two additional billets, lengths offlat-rolled stock, or tubes shall be made. Both retests for the elements in question shall meet the requirements of this specification; otherwise, all remaining material in the heat shall be rejected or, at the option of the producer, each billet or tube may be individually tested for acceptance. Billets, lengths offlat-rolled stock, or tubes that do not meet the requirements of this specification shall be re- jected. N OTE 1—For flange and flaring requirements, the term lot applies to all tubes prior to cutting of the same nominal size and wall thickness that are produced from the same heat of steel. When final heat treatment is in a batch-type furnace, a lot shall include only those tubes of the same size and from the same heat that are heat treated in the same furnace charge. When the final heat treatment is in a continuous furnace, or when heat treated condition is obtained directly by quenching after hot forming, the number of tubes of the same size and from the same heat in a lot shall be determined from the size of the tubes as prescribed in Table 3.

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