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ASTM B726-02(R2021) pdf download

ASTM B726-02(R2021) pdf download.Standard Specification for Nickel-Chromium-Molybdenum-Cobalt-Tungsten-Iron-Silicon Alloy (UNS N06333) Welded Tube
1.1 This specification covers alloy UNS N06333 in the form of welded tube intended for heat-resisting applications and general corrosive service.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to become familiar with all hazards including those identified in the appropriate Safety Data Sheet (SDS) for this product/material as provided by the manufacturer, to establish appropriate safety, health, and environmental practices, and determine the applicability ofregulatory limitations prior to use.
1.4 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. General Requirement
3.1 Material furnished under this specification shall con-form to the applicable requirements of Specification B751 unless otherwise provided herein.
4. Ordering Information
4.1 It is the responsibility of the purchaser to specify all requirements that are necessary for material ordered to this specification. Examples of such requirements include, but are not limited to, the following:
4.1.1 Alloy or UNS number,
4.1.2 ASTM designation and date of issue,
4.1.3 Dimensions (outside or inside diameter and nominal-wall thickness),
4.1.4 Length (specific or random),
4.1.5 Quantity (feet or number of pieces),
4.1.6 Certification—State if certification is required,
4.1.7 Samples for Product (Check) Analysis—State whether samples should be furnished, and
4.1.8 Purchaser Inspection—If purchaser wishes to witness tests or inspection of material at place of manufacture, the purchase order must so state indicating which tests or inspec-tions are to be witnessed.
5. Materials and Manufacture
5.1 The tube shall be made from flat-rolled alloy conform-ing to Specification B718, by an automatic welding process with no addition of filler metal.
5.2 Tube shall be furnished annealed after welding, with oxide removed. When the final heat treatment is performed in a protective atmosphere, descaling is not necessary.
6. Chemical Composition
6.1 The material shall conform to the requirements as to chemical composition specified in Table 1.
6.2 If a product (check) analysis is performed by the purchaser, the material shall conform to the product (check) analysis variations in Specification B751.
7. Mechanical and Other Requirements
7.1 The mechanical properties of the material at room temperature shall conform to those shown in Tables 2-4.
7.2 One test is required for each lot as defined in Specifi-cation B751.
7.3 Flattening Test—A flattening test shall be made on each end of one tube per lot. Superficial ruptures resulting from surface imperfections shall not be cause for rejection.
7.4 Flange Test—A flange test shall be made on each end of one tube per lot.
7.5 Nondestructive Test Requirements:
7.5.1 Tubes shall be subjected to a pressure test or nonde-structive electric test at the manufacturer’s option. Leak Test—Hydrostatic or pneumatic (air underwa-ter).
(1) These permissible variations in outside diameter apply only to tubes as finished at the mill before subsequent swaging, expanding, bending, polishing, or other fabricating operations.
(2) Wall thickness variation shall not exceed ±15 % ofthe nominal wall thickness for tube under 1 ⁄ 2 -in. (12.7-mm) outside diameter, and ±10 % of nominal wall thickness for tube of outside diameter 1 ⁄ 2 in. (12.7 mm) and over.
(3) For ovality values, the tolerance for average outside diameter at any one cross section does not exceed the outside diameter tolerance for the applicable outside diameter.

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