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Unformatted text preview: SPECIFICATION FOR NICKEL-IRON-CHROMIUMSILICON ALLOYS (UNS N08330 AND N08332) SEAMLESS PIPE AND TUBE SB-535 01 (Identical with ASTM Specification B 535-99 except that certification has been made mandatory.) 1. Scope 4.1.3 Dimensions: Pipe — Specify standard pipe size and schedule, Tube — Specify outside diameter and nominal or minimum wall, Length (specific or random), 4.1.4 Finish: Pipe — Specify cold-worked or hotworked, Tube — Specify cold-worked or hotfinished, 4.1.5 Quantity (feet or meters or number of pieces), 4.1.6 Certification — Certification is required, 1.1 This specification covers alloys UNS N08330 and N08332 in the form of hot-finished and cold-finished seamless pipe and tube intended for heat resisting applications and general corrosive service. 1.2 The values stated in inch-pound units are to be considered as the standard. The values given in parentheses are for information only. 2. Referenced Document 2.1 ASTM Standard: B 829 Specification for General Requirements for Nickel and Nickel Alloy Seamless Pipe and Tube 3. General Requirement 3.1 Material furnished under this specification shall conform to the applicable requirements of Specification B 829 unless otherwise provided herein. 4.1.7 Samples for Product (Check) Analysis — State whether samples for product analysis 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 test or inspections are to be witnessed. 4. Ordering Information 4.1 It is the responsibility of the purchaser to specify all requirements that are necessary for the safe and satisfactory performance of material ordered under this specification. Examples of such requirements include, but are not limited to, the following: 4.1.1 Alloy name or UNS number, 4.1.2 ASTM designation and year of issue, 666 5. Materials and Manufacture 5.1 Heat Treatment — The material shall be furnished in the annealed condition. The final heat treatment of UNS N08330 shall be 1900°F (1040°C) minimum. The final heat treatment of UNS N08332 shall be 2100°F (1150°C) minimum. COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling Services PART B — NONFERROUS MATERIAL SPECIFICATIONS TABLE 1 CHEMICAL REQUIREMENTS Element C Mn P S Si Cr Ni Cu Pb Sn Fe A SB-535 Composition Limits, % . . .A 2.00 max 0.03 max 0.03 max 0.75–1.50 17.0–20.0 34.0–37.0 1.00 max 0.005 max 0.025 max remainderB 7.2 Grain Size — Annealed alloy UNS N08332 shall conform to an average grain size of ASTM No. 5 or coarser. One test per lot is required. 7.3 Flattening Test — One section of pipe or tube per lot, not less than 21⁄2 in. (63.5 mm) in length, shall be flattened cold between parallel plates in two steps. During the first step, which is test for ductility, no cracks or breaks on the inside, outside, or end surfaces shall occur until the distance between the plates is less than the value H calculated as follows: H p 1.09 t/(0.09 + t/D) (1) Alloy UNS N08330: 0.08 max. Alloy UNS N08332: 0.05–0.10. B Element shall be determined arithmetically by difference. 6. Chemical Composition where: H p distance between parallel plates, in., t p specified wall thickness, in., and D p nominal outside diameter, in. During the second step, which is a test for soundness, the flattening shall be continued until the specimen breaks or the opposite walls of the pipe or tube meet. 7.4 Hydrostatic Test: 7.4.1 Each pipe or tube shall be subjected to the hydrostatic test. 6.1 The material shall conform to the composition limits specified in Table 1. 6.1.1 A chemical analysis shall be made on each lot of material as described in Specification B 829. 6.2 If a product (check) analysis is performed by the purchaser, the material shall conform to the product analysis variations prescribed in Specification B 829. 8. Dimensions and Permissible Variations 7. Mechanical and Other Properties 8.1 The permissible variations in outside diameter for pipe, both cold-finished and hot-finished, are shown in Table 3. Other dimensions and permissible variations are provided in Specification B 829. 7.1 The material shall conform to the mechanical properties listed in Table 2. 7.1.1 One tension test shall be made on each lot of material. 9. Keywords 9.1 high-temperature alloy; N08330; N08332; seamless pipe; seamless tube TABLE 2 MECHANICAL PROPERTIES Alloy UNS N08330 UNS N08332 A Condition annealed annealed Tensile Strength, min, psi (MPa) 70 000 (483) 67 000 (462) Yield Strength, 0.2% offset, min, psi (MPa) 30 000 (207) 27 000 (186) Elongation in 2 in. or 50 mm, or 4D, min, % 30 30 HardnessA 70 to 90 HRB 65 to 88 HRB Hardness values are informative only and not to be construed as the basis for acceptance. 667 COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling Services SB-535 2001 SECTION II TABLE 3 PERMISSIBLE VARIATIONS IN OUTSIDE DIAMETER, HOT-FINISHED AND COLD-FINISHED PIPE Permissible Variations in Outside Diameter Over Nominal Pipe Size, in. 1 Under mm 0.4 0.8 1.6 2.4 in. 1 1 in. 1 1 mm 0.8 0.8 0.8 0.8 ⁄8 to 11⁄2, incl Over 11⁄2 to 4, incl Over 4 to 8, incl Over 8 to 18, incl ⁄64 ⁄32 1 ⁄16 3 ⁄32 ⁄32 ⁄32 1 ⁄32 1 ⁄32 668 COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling Services ...
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This note was uploaded on 10/04/2010 for the course ENGINEERS 22453175 taught by Professor Heydari during the Spring '08 term at Miami University.

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