B564-04镍合金锻件

Designation: B 564 – 04 Standard Specification for Nickel Alloy Forgings1 This standard is issued under the fixed designation B 564; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon (e) indicates an editorial change since the last revision or reapproval. This standard has been approved for use by agencies of the Department of Defense. 1. Scope* 1.1 This specification2 covers forgings of nickel alloy UNS N02200, Ni-Cu alloy UNS N04400, Ni-Cr-Fe alloys UNS N06600, UNS N06603, and UNS N06690, Ni-Cr-Mo-Nb alloy UNS N06625, Ni-Cr-Mo-Si alloy UNS N06219, low-carbon Ni-Mo-Cr alloys UNS N10276 and UNS N06022, Ni-Cr- Mo-W alloy UNS N06110, low-carbon Ni-Cr-Mo-W alloy UNS N06686, Ni-Fe-Cr-Mo-Cu alloy UNS N08825, Fe-Ni-Cr- Mo-N alloy UNS N08367, low-carbon Ni-Cr-Mo alloys UNS N06035, UNS N06058, and UNS N06059, low carbon Ni-Cr- Mo-Cu alloy UNS N06200, Ni-Mo-Cr-Fe alloy UNS N10242, Ni-Mo alloys UNS N10665 and UNS N10675, low-carbon Ni-Fe-Cr-Mo-Cu alloy UNS N08031, Ni-Cr-W-Mo alloy UNS N06230, Ni-Cr-Co-Mo alloy UNS N06617, Ni-Co-Cr-Si alloy UNS N12160, Ni-Fe-Cr alloys, Ni-Mo alloy UNS N10629, Ni-Cr-Fe-Al alloy UNS N06025, Ni-Cr-Fe-Si alloy UNS N06045, Low-Carbon Ni-Mo-Cr-Ta alloy UNS N06210, Ni- Mo-Cr-Fe alloy UNS N10624, and low-carbon Cr-Ni-Fe-N alloy UNS R20033*. 1.1.1 The nickel-iron-chromium alloys are UNS N08120, UNS N08800, UNS N08810, and UNS N08811. Alloy UNS N08800 is normally employed in service temperatures up to and including 1100°F (593°C). Alloys UNS N08810, N08120, and UNS N08811 are normally employed in service tempera- tures above 1100°F where resistance to creep and rupture is required, and are annealed to develop controlled grain size for optimum properties in this temperature range. 1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only. 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 Material Safety Data Sheet for this product/material as pro- vided by the manufacturer, to establish appropriate safety and health practices, and determine the applicability of regulatory limitations prior to use. 2. Referenced Documents 2.1 ASTM Standards: 3 B 880 Specification for General Requirements for Chemical Check Analysis Limits for Nickel, Nickel Alloys and Cobalt Alloys E 8 Test Methods for Tension Testing of Metallic Materials E 29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications E 76 Test Methods for Chemical Analysis of Nickel-Copper Alloys4 E 112 Test Methods for Determining the Average Grain Size E 350 Test Methods for Chemical Analysis of Carbon Steel, Low-Alloy Steel, Silicon Electrical Steel, Ingot Iron, and Wrought Iron E 1473 Test Methods for Chemical Analysis of Nickel, Cobalt, and High-Temperature Alloys 2.2 Military Standards:5 MIL-STD-129 Marking for Shipment and Storage MIL-STD-271 Nondestructive Testing Requirements for Metals 3. Ordering Information 3.1 It is the responsibility of the purchaser to specify all requirements that are necessary for material ordered under this specification. Examples of such requirements include, but are not limited to, the following: 3.1.1 Alloy (Table 1). 3.1.2 Condition (Table 2). 3.1.3 Quantity (mass or number of pieces). 3.1.4 Forging, sketch or drawing. 1 This specification is under the jurisdiction of ASTM Committee B02 on Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee B02.07 on Refined Nickel and Cobalt and Their Alloys. Current edition approved Feb. 1, 2004. Published February 2004. Originally approved in 1972. Last previous edition approved in 2000 as B 564 – 00a. 2 For ASME Boiler and Pressure Vessel Code applications see related Specifi- cation SB-564 in Section II of that Code. * New designations established in accordance with ASTM E 527 and SAE J1086, Practice for Numbering Metals and Alloys (UNS). 3 For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards volume information, refer to the standard’s Document Summary page on the ASTM website. 4 Withdrawn. 5 Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098 1 *A Summary of Changes section appears at the end of this standard. Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States. TABLE 1 Chemical Requirements Composition, % Element Nickel- Copper Alloy UNS N04400 Nickel- Chromium- Iron Alloy UNS N06600 Nickel- Chromium- Iron Alloy UNS N06690 Nickel-Iron Chromium Alloy UNS N08120 Nickel-Iron- Chromium Alloy UNS N08800 Nickel-Iron- Chromium Alloy UNS N08810 Nickel- Chromium- Iron- Aluminum Alloy UNS N06603 Nickel- Chromium- Iron- Aluminum Alloy UNS N06025 Nickel- Chromium- Iron-Silicon Alloy UNS N06045 Low- Carbon Nickel- Molybdenum- Chromium- Tantalum Alloy UNS N06210 Nickel 63.0A min 72.0A min 58.0 minA 35.0–39.0 30.0–35.0 30.0–35.0 balanceA balance 45 min remainderA Copper 28.0–34.0 0.5 max 0.5 max 0.50 max 0.75 max 0.75 max 0.5 max 0.10 max 0.3 max ... Iron 2.5 max 6.0–10.0 7.0–11.0 remainder 39.5 minA 39.5 minA 8.0–11.0 8.0–11.0 21.0–25.0 1.0 max Manganese 2.0 max 1.0 max 0.5 max 1.5 1.5 max 1.5 max 0.15 max 0.15 1.0 0.5 max Carbon 0.3 max 0.15 max 0.05 max 0.02–0.10 0.10 max 0.05–0.10 0.20–0.40 0.15–0.25 0.05–0.12 0.015 max Silicon 0.5 max 0.5 max 0.5 max 1.0 1.0 max 1.0 max 0.5 max 0.5 2.5–3.0 0.08 max Sulfur, max 0.024 0.015 0.015 0.03 0.015 0.015 0.010 0.01 0.010 0.02 Chromium ... 14.0–17.0 27.0–31.0 23.0–27.0 19.0–23.0 19.0–23.0 24.0–26.0 24.0–26.0 26.0–29.0 18.0-20.0 Aluminum ... ... ... 0.40 max 0.15–0.60 0.15–0.60 2.4–3.0 1.8–2.4 ... ... Titanium ... ... ... 0.20 max 0.15–0.60 0.15–0.60 0.01–0.25 0.1–0.2 ... ... Columbium (Nb) + tantalum ... ... ... 0.4–0.9 ... ... ... ... ... ... Molybdenum ... ... ... 2.50 max ... ... ... ... ... 18.0-20.0 Phosphorus ... ... ... 0.040 max ... ... 0.02 max 0.02 max 0.02 max 0.02 max Tungsten ... ... ... 2.50 max ... ... ... ... ... ... Cobalt, max ... ... ... 3.0 ... ... ... ... ... 1.0 Vanadium, max ... ... ... ... ... ... ... ... ... 0.35 Nitrogen ... ... ... 0.15–0.30 ... ... ... ... ... ... Boron ... ... ... 0.010 max ... ... ... ... ... ... Lanthanum Aluminum + Titanium ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... Nickel + Molybdenum ... ... ... ... ... ... ... ... ... ... Columbium (Nb) max ... ... ... ... ... ... ... ... ... ... Tantalum ... ... ... ... ... ... ... ... ... 1.5-2.2 Zirconium, max ... ... ... ... ... ... 0.01–0.10 0.01–0.10 ... ... Cerium ... ... ... ... ... ... ... ... 0.03–0.09 ... Yttrium ... ... ... ... ... ... 0.01–0.15 0.05–0.12 ... ... A Element shall be determined arithmetically by difference. B 564 – 04 2 TABLE 1 Chemical Requirements (continued) Element Composition, % Nickel-Iron- Chromium Alloy UNS N08811 Nickel- Chromium- Molybdenum- Columbium Alloy UNS N06625 Nickel- Chromium- Molybdenum- Tungsten Alloy UNS N06110 Nickel-Iron Chromium- Molybdenum- Copper Alloy UNS N08825 Low- Carbon Nickel- Molyb- denum- Chromium Alloy UNS N10276 Low- Carbon Nickel- Molyb- denum- Chro- mium Alloy UNS N06022 Iron-Nickel- Chromium- Molyb- denum- Nitrogen Alloy UNS N08367 Low- Carbon Nickel- Chromium Molyb- denum Alloy UNS N06059 Low- Carbon Nickel- Chromium Molyb- denum Alloy UNS N06058 Nickel 30.0–35.0 58.0 minA 51.0 minA 38.0–46.0 remainderA remainderA 23.50–25.50 balanceA balance Copper 0.75 max ... 0.50 max 1.5–3.0 ... ... 0.75 max 0.50 max 0.50 max Iron 39.5 minA 5.0 max 1.0 max 22.0 minA 4.0–7.0 2.0–6.0 remainderA 1.5 max 1.5 max Manganese 1.5 max 0.5 max 1.0 max 1.0 max 1.0 max 0.50 max 2.00 max 0.5 max 0.50 max Carbon 0.06–0.10 0.10 max 0.15 max 0.05 max 0.010 max 0.015 max 0.030 max 0.010 max 0.010 max Silicon 1.0 max 0.5 max 1.0 max 0.5 max 0.08 max 0.08 max 1.00 max 0.10 max 0.10 max Sulfur, max 0.015 0.015 0.015 0.03 0.03 0.02 0.030 0.010 0.010 Chromium 19.0–23.0 20.0–23.0 28.0–33.0 19.5–23.5 14.5–16.5 20.0–22.5 20.0–22.0 22.0–24.0 20.0–23.0 Aluminum 0.15–0.60 0.4 max 1.0 max 0.2 max ... ... ... 0.1–0.4 0.40 max Titanium 0.15–0.60 0.4 max 1.0 max 0.6–1.2 ... ... ... ... ... Columbium (Nb) + tantalum ... 3.15–4.15 1.0 max ... ... ... ... ... ... Molybdenum ... 8.0–10.0 9.0–12.0 2.5–3.5 15.0–17.0 12.5–14.5 6.00–7.00 15.0–16.5 19.0 - 21.0 Phosphorus ... 0.015 max 0.50 max ... 0.04 max 0.02 max 0.040 max 0.015 max 0.015 max Tungsten ... ... 1.0-4.0 ... 3.0–4.5 2.5–3.5 ... ... 0.3 max Cobalt ... ... ... ... 2.5 max 2.5 max ... 0.3 max 0.3 max Vanadium, max ... ... ... ... 0.35 0.35 ... ... ... Nitrogen ... ... ... ... ... ... 0.18–0.25 ... 0.02 - 0.15 Boron ... ... ... ... ... ... ... ... ... Lanthanum Aluminum + Titanium ... 0.85–1.20 ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... Nickel + Molybdenum ... ... ... ... ... ... ... ... ... Columbium (Nb), max ... ... ... ... ... ... ... ... ... Tantalum ... ... ... ... ... ... ... ... ... Zirconium, max ... ... ... ... ... ... ... ... ... Cerium ... ... ... ... ... ... ... ... ... Yttrium ... ... ... ... ... ... ... ... ... A Element shall be determined arithmetically by difference. B 564 – 04 3 TABLE 1 Chemical Requirements (continued) Composition, % Element Low- Carbon Nickel- Chromium- Molybdenum Alloy UNS N06035 Low- Carbon Nickel- Chromium- Molyb- dnum- Copper Alloy UNS N06200 Nickel- Chromium- Molyb- dnum- Silicon Alloy UNS N06219 Low- Carbon Nickel-Iron Chromium- Molyb- dnum- Copper Alloy UNS N08031 Nickel Chro- mium- Tungsten- Molyb- denum Alloy UNS N06230 Nickel Chromium- Cobalt- Molyb- denum Alloy UNS N06617 Nickel- Molyb- denum Alloy UNS N10629 Nickel- Molyb- denum Alloy UNS N10665 Nickel remainderA remainderB balanceB 30.0–32.0 remainderA 44.5 min balance remainderA Copper 0.30 max 1.3–1.9 0.50 max 1.0–1.4 ... 0.5 max 0.5 max ... Iron 2.00 max 3.0 max 2.0-4.0 balanceB 3.0 max 3.0 max 1.0–6.0 2.0 max Manganese 0.50 max 0.50 max 0.50 max 2.0 max 0.30–1.00 1.0 max 1.5 1.0 max Carbon 0.050 max 0.010 max 0.05 max 0.015 max 0.05–0.15 0.05–0.15 0.010 max 0.02 max Silicon 0.60 max 0.08 max 0.70-1.10 0.3 max 0.25–0.75 1.0 max 0.05 0.10 max Sulfur, max 0.015 0.010 0.010 0.010 0.015 0.015 0.01 0.03 Chromium 32.25–34.25 22.0–24.0 18.0-22.0 26.0-28.0 20.0–24.0 20.0–24.0 0.5–1.5 1.0 max Aluminum 0.40 max 0.50 max 0.50 max ... 0.20–0.50 0.8–1.5 0.1–0.5 ... Titanium ... ... 0.50 max ... ... 0.6 max ... ... Columbium (Nb) + tantalum ... ... ... ... ... ... ... ... Molybdenum 7.60–9.00 15.0–17.0 7.0-9.0 6.0-7.0 1.0–3.0 8.0–10.0 26.0–30.0 26.0–30.0 Phosphorus 0.030 max 0.025 max 0.020 max 0.020 max 0.030 max ... 0.04 max 0.04 max Tungsten 0.60 max ... ... ... 13.0–15.0 ... ... ... Cobalt 1.00 max 2.0 max 1.0 max ... 5.0 max 10.0 min– 15.0 max 2.5 1.00 max Vanadium, max 0.20 ... ... ... ... ... ... ... Nitrogen ... ... ... 0.15-0.25 ... ... ... ... Boron ... ... ... ... 0.015 max 0.006 max ... ... Lanthanum Aluminum + Titanium ... ... ... ... 0.005–0.050 ... ... ... ... ... ... Nickel + Molybdenum ... ... ... ... ... ... ... ... Columbium (Nb), max ... ... ... ... ... ... ... ... Tantalum ... ... ... ... ... ... ... ... Zirconium, max ... ... ... ... ... ... ... ... Cerium ... ... ... ... ... ... ... ... Yttrium ... ... ... ... ... ... ... ... B Element shall be determined arithmetically by difference. B 564 – 04 4 TABLE 1 Chemical Requirements (continued) Element Composition, % Nickel- Molyb- denum Alloy UNS N10675 Nickel- Molyb- denum- Chromium- Iron Alloy UNS N10242 Low- Carbon Nickel- Chro- mium- Molyb- denum- Tungsten Alloy UNS N06686 Nickel- Cobalt- Chro- mium- Silicon Alloy UNS N12160 Nickel Alloy UNS N02200 Nickel- Molyb- denum Chro- mium- Iron Alloy UNS N10624 Chromium- Nickel-Iron- Nitrogen Alloy UNS R20033 Nickel 65.0 min remainderA remainder remainderA 99.0A min remainderA 30.0–33.0 Copper 0.20 max ... ... ... 0.25 max 0.5 max 0.30–1.20 Iron 1.0–3.0 2.0 max 5.0 max 3.5 max 0.40 max 5.0-8.0 balanceA Manganese 3.0 max 0.80 max 0.75 max 1.5 max 0.35 max 1.0 max 2.0 Carbon 0.01 max 0.03 0.010 max 0.15 max 0.15 max 0.01 max 0.015 max Silicon 0.10 max 0.80 max 0.08 max 2.4–3.0 0.35 max 0.10 max 0.50 Sulfur, max 0.010 0.015 0.02 0.015 0.01 0.01 max 0.01 Chromium 1.0–3.0 7.0-9.0 19.0–23.0 26.0–30.0 ... 6.0-10.0 31.0–35.0 Aluminum 0.50 max 0.50 max ... ... ... 0.5 max ... Titanium 0.20 max ... 0.02–0.25 0.20–0.80 ... ... ... Columbium (Nb) + tantalum ... ... ... ... ... ... ... Molybdenum 27.0–32.0 24.0-26.0 15.0–17.0 1.0 max ... 21.0-25.0 0.50–2.0 Phosphorus 0.030 max 0.030 max 0.04 max 0.030 max ... 0.025 max 0.02 max Tungsten 3.0 max ... 3.0–4.4 1.0 max ... ... ... Cobalt 3.0 max† 1.00 max ... 27.0–33.0† ... 1.0 max ... Vanadium, max 0.20 ... ... ... ... ... ... Nitrogen ... ... ... ... ... ... 0.35–0.60 Boron ... 0.006 max ... ... ... ... ... Lanthanum Aluminum + Titanium ... ... ... ... ... ... ... ... ... ... ... ... ... Nickel + Molybdenum 94.0–98.0 ... ... ... ... ... ... Columbium (Nb), max 0.20 ... ... 1.0 ... ... ... Tantalum 0.20 max ... ... ... ... ... ... Zirconium, max 0.10 ... ... ... ... ... ... Cerium ... ... ... ... ... ... ... Yttrium ... ... ... ... ... ... ... A Element shall be determined arithmetically by difference. B 564 – 04 5 3.1.5 Certification— State if certification or a report of test results is required (14.1). 3.1.6 Samples for Product (Check) Analysis—Whether samples for product (check) analysis should be furnished (see 4.2). 3.1.7 Purchaser Inspection—If the purchaser wishes to witness tests or inspection of material at the place of manu- facture, the purchase order must so state indicating which tests or inspections are to be witnessed (12.1). 4. Chemical Composition 4.1 The material shall conform to the composition limits specified in Table 1. 4.2 If a product (check) analysis is performed by the purchaser, the material shall conform to the product (check) analysis variations per Specification B 880. 5. Mechanical Properties and Other Requirements 5.1 Mechanical Properties—The material shall conform to the mechanical properties specified in Table 2. 5.2 Grain Size—Annealed alloys (UNS N08810, N08120, and UNS N08811) shall conform to an average grain size of ASTM No. 5 or coarser. 6. Dimensions and Permissible Variations 6.1 Dimensions and tolerances shall be as specified on the applicable forging sketch or drawing. 7. Workmanship, Finish, and Appearance 7.1 The material shall be uniform in quality and condition, sound, and free of injurious imperfections. TABLE 2 Mechanical Property RequirementsA Material and Condition Maximum Section Thickness, in. (mm) Tensile Strength, min, ksi (MPa) Yield Strength, 0.2 % Offset, min, ksi (MPa) Elongation in 2 in. or 50 mm or 4D, min, % Nickel alloy UNS N02200, annealed ... 55 (380) 15 (105) 40 Nickel-copper alloy UNS N04400, annealed ... 70 (483) 25 (172) 35 Nickel-chromium-iron alloy UNS N06600, annealed ... 80 (552) 35 (241) 30 UNS N06690, annealed ... 85 (586) 35 (241) 30 Low-carbon nickel-chromium molybdenum Alloy UNS N06035 ... 85 (586) 35 (241) 30 Alloy UNS N06058 ... 110 (760) 52 (3600 40 Alloy UNS N06059 ... 100 (690) 45 (310) 45 Low carbon nickel-chromium molybdenum-copper alloy UNS N06200 ... 100 (690) 41 (283) 45 Nickel-iron-chromium alloys: Annealed (alloy UNS N08120) ... 90 (621) 40 (276) 30 Annealed (alloy UNS N08800) ... 75 (517) 30 (207) 30 Annealed (alloys UNS N08810 and UNS N08811) ... 65 (448) 25 (172) 30 Nickel-chromium-molybenum- columbium alloy UNS N06625, annealed Up to 4 (102), incl 120 (827) 60 (414) 30 TABLE 2 Continued Material and Condition Maximum Section Thickness, in. (mm) Tensile Strength, min, ksi (MPa) Yield Strength, 0.2 % Offset, min, ksi (MPa) Elongation in 2 in. or 50 mm or 4D, min, % Over 4B (102) to 10 (254), incl 110 (758) 50 (345) 25 Nickel-chromium- molybdenum-tungsten alloy UNS N06110, annealed Up to 4 (102), incl 95 (655) 45 (310) 60 Over 4 (102) to 10 (254), incl 90 (621) 40 (276) 50 Nickel-iron-chromium- molybdenum-copper alloy UNS N08825 ... 85 (586) 35 (241) 30 Low carbon nickel-chrom- ium-molybdenum alloy UNS N10276, annealed ... 100 (690) 41 (283) 40 Low-carbon nickel-chrom- ium-molybdenum alloy UNS N06022 ... 100 (690) 45 (310) 45 Iron-nickel-chromium-molyb- denum-nitrogen alloy UNS N08367 ... 95 (655) 45 (310) 30 Low-carbon nickel-iron- chromium-molybdenum- copper-alloy UNS N08031 ... 94 (650) 40 (276) 40 Nickel-chromium-tungsten- molybdenum alloy UNS N06230, annealedC ... 110 (758) 45 (310) 40 Nickel-chromium-cobalt- molybdenum alloy UNS N06617 ... 95 (655) 35 (241) 35 Nickel-molybdenum alloy UNS N10665, annealed ... 110 (760) 51 (350) 40 Nickel-molybdenum alloy UNS N10675, annealed ... 110 (760) 51 (350) 40 Nickel-molybdenum- chromium-iron alloy UNS N10242, annealed ... 105 (725) 45 (310) 40 Low-carbon nickel-chro- mium-molybdenum-tung- sten alloy UNS N06686 ... 100 (690) 45 (310) 45 Nickel-cobalt-chromium -silicon alloy UNS N12160, annealed ... 90 (620) 35 (240) 40 Low-carbon chromium- nickel-iron-nitrogen alloy UNS R20033 ... 109 (750) 55 (380) 40 Nickel-molybdenum alloy UNS N10629, annealed ... 110 (760) 51 (350) 40 Nickel-chromium- iron- aluminum alloy UNS N06025, annealed Up to 4 (102) incl. 98 (680) 39 (270) 30 Over 4 (102) to 12 (305) incl 84 (580) 39 (270) 15 Nickel-chromium- iron- aluminum alloy UNS N06603, annealed ... 94 (650) 43 (300) 25 Nickel-chromium-iron-silicon alloy UNS N06045, annealed ... 90 (620) 35 (240) 35 Nickel-molybdenum- chromium-iron alloy UNS N10624, annealed ... 104 (720) 46 (320) 40 Low-carbon nickel- molybdenum-chromium- tantalum alloy UNS N06210, annealed ... 100 (690) 45 (310) 45 B 564 – 04 6 TABLE 2 Continued Material and Condition Maximum Section Thickness, in. (mm) Tensile Strength, min, ksi (MPa) Yield Strength, 0.2 % Offset, min, ksi (MPa) Elongation in 2 in. or 50 mm or 4D, min, % Nickel-chromium- molybdenum-silicon alloy UNS N06219 ... 96 (660) 39 (270) 50 A Forging quality is furnished to chemical requirements and surface inspection only. B Over 4 to 10-in. (102 to 254-mm) diameter for parts machined from forged bar. C Solution annealed at a minimum temperature of 2150° F (1177° C) followed by a water quench or rapidly cooled by other means. 8. Sampling 8.1 Lot Definition: 8.1.1 A lot for chemical analysis shall consist of one heat. 8.1.2 A lot for mechanical properties and grain size testing shall consist of all material from the same heat, size, finish, condition, and processed at one time. 8.2 Test Material Selection: 8.2.1 Chemical Analysis—Representative samples shall be taken during pouring or subsequent processing. 8.2.1.1 Product (check) analysis shall be wholly the respon- sibility of the purchaser. 8.2.2 Mechanical Properties and Grain Size—Samples of the material to provide test specimens for mechanical proper- ties and grain size shall be taken from such locations in each lot as to be representative of that lot. 9. Number of Tests 9.1 Chemical Analysis—One test per lot. 9.2 Mechanical Properties—One test per lot. 9.3 Grain Size—For alloys N08810, N08120, and UNS N08811, one test per lot. 10. Specimen Preparation 10.1 The tension test specimen representing each lot shall be taken from a forging or from a test prolongation. 10.2 The axis of the specimen