1、Age-hardened Nickel-based Alloys for Oil and Gas Drilling and Production EquipmentAPI STANDARD 6ACRAFIRST EDITION, AUGUST 2015ERRATA, OCTOBER 2015Special NotesAPI publications necessarily address problems of a general nature. With respect to particular circumstances, local,state, and federal laws an
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15、sed, reaffirmed, or withdrawn at least every five years. A one-timeextension of up to two years may be added to this review cycle. Status of the publication can be ascertained from theAPI Standards Department, telephone (202) 682-8000. A catalog of API publications and materials is publishedannually
16、 by API, 1220 L Street, NW, Washington, DC 20005.Suggested revisions are invited and should be submitted to the Standards Department, API, 1220 L Street, NW,Washington, DC 20005, standardsapi.org.iiiContentsPage1 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.1 Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.2 Applicability . . . . . . . . . . . . .
18、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Normative References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Terms, D
19、efinitions, and Abbreviated Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23.1 Terms and Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
20、23.2 Abbreviated Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Requirements for Age-hardened Nickel-based Alloys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
21、. 34.1 Process Control Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34.2 Testing Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
22、 . . . . . . . . . . 75 Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156 Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Annex A (informative) Reference Microstructures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16FiguresA.1 Acceptable Microstructure for UNS N07718 . . . . . . . . . . . . . . . . . .
24、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17A.2 Acceptable Microstructure for UNS N07718 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18A.3 Acceptable Microstructure for UNS N07718 Showing Isolated Grain Boundary Precipitates
25、. . . . . . . . . 19A.4 Acceptable Microstructure for UNS N07718 Showing Isolated Acicular Grain Boundary Precipitates . 20A.5 Unacceptable Microstructure for UNS N07718 Showing Acicular Grain Boundary Precipitates . . . . . . 21A.6 Unacceptable Microstructure for UNS N07718 Showing Acicular Grain B
26、oundary Precipitates . . . . . . 22A.7 Unacceptable Microstructure for UNS N07718 Showing Acicular Grain Boundary Precipitates . . . . . . 23A.8 Unacceptable Microstructure for UNS N07718 Showing Acicular Grain Boundary Precipitates . . . . . . 24A.9 Unacceptable Microstructure for UNS N07718 Showin
27、g Grain Boundary Precipitates . . . . . . . . . . . . . . 25A.10 Acceptable Microstructure for UNS N09925, UNS N09935, UNS N09945, UNS N07716, and UNS N07725 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
28、26A.11 Acceptable Microstructure for UNS N09925, UNS N09935, UNS N09945, UNS N07716, and UNS N07725 Showing Isolated Grain Boundary Precipitation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27A.12 Acceptable Microstructure for UNS N09925, UNS N09935, UNS N09945, UNS N07716, and UNS N0
29、7725 Showing Partial Coverage of Grain Boundaries with Second Phase Particles. . . . . 28A.13 Acceptable Microstructure for UNS N09925, UNS N09935, UNS N09945, UNS N07716, and UNS N07725 Showing Partial Coverage of Grain Boundaries with Second Phase Particles. . . . . 29A.14 Unacceptable Microstruct
30、ure for UNS N09925, UNS N09935, UNS N09945, UNS N07716, and UNS N07725 Showing Full Coverage of Grain Boundaries with Second Phase Particles . . . . . . . 30A.15 Unacceptable Microstructure for UNS N09925, UNS N09935, UNS N09945, UNS N07716, and UNS N07725 Showing Acicular Grain Boundary Precipitate
31、s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31A.16 Unacceptable Microstructure for UNS N09925, UNS N09935, UNS N09945, UNS N07716, and UNS N07725 Due To Acicular Precipitates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32A.17 Unaccept
32、able Microstructure for UNS N09925, UNS N09935, UNS N09945, UNS N07716, and UNS N07725 Showing Grain Boundary Precipitates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33vContentsPageTables1 Chemical Composition . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
33、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Heat Treatment Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 Etchants Used for Macroetch Examination . . . . . . . . . . .
34、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84 Etchants Used for Microstructure Examination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95 Tensile Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . .
35、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116 Charpy V-notch Impact Toughness Requirements (10 mm 10 mm). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127 Hardness Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
36、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14viIntroductionThis standard for Age-Hardened Nickel-Based Alloys was formulated by the API Committee on Standardization of Oilfield Equipment and Materials (CSOEM), Subcommittee on Valves and Wellhead Equipment (SC6), Materials Task Group
37、. It is based on the conclusions of a task group evaluation of requirements needed for Age-Hardened Nickel-Based Alloys to supplement the existing requirements of API Specification 6A, Specification for Wellhead and Christmas Tree Equipment.vii1Age-hardened Nickel-based Alloys for Oil and Gas Drilli
38、ng and Production Equipment1 Scope1.1 PurposeThis document provides requirements for age-hardened nickel-base alloys that are intended to supplement the existing requirements of API 6A. For downhole applications refer to API 5CRA.These additional requirements include detailed process control require
39、ments and detailed testing requirements. The purpose of these additional requirements is to ensure that the age-hardened nickel-base alloys used in the manufacture of API 6A pressure-containing and pressure-controlling components are not embrittled by the presence of an excessive level of deleteriou
40、s phases and meet the minimum metallurgical quality requirements.1.2 ApplicabilityThis standard is intended to apply to pressure-containing and pressure-controlling components as defined in API 6A. Requirements of this standard may be applied by voluntary conformance by a manufacturer, normative ref
41、erence in API 6A or other product specification(s), or by contractual agreement.2 Normative ReferencesThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the ref
42、erenced document (including any amendments) applies. API Specification 6A, Specification for Wellhead and Christmas Tree EquipmentASTM A370 1, Standard Test Methods and Definitions for Mechanical Testing of Steel ProductsASTMA604, Standard Practice for Macroetch Testing of Consumable Electrode Remel
43、ted Steel Bars and BilletsASTMB880, Standard Specification for General Requirements for Chemical Check Analysis Limits for Nickel, Nickel Alloys and Cobalt AlloysASTME10, Standard Test Method for Brinell Hardness Test of Metallic MaterialsASTME18, Standard Test Methods for Rockwell Hardness of Metal
44、lic MaterialsASTME29, Standard Practice for Using Significant Digits in Test Data to Determine Conformance with SpecificationsASTME110, Standard Test Method for Rockwell and Brinell Hardness of Metallic Materials by Portable Hardness TestersASTME112, Standard Test Methods for Determining Average Gra
45、in SizeASTME354, Standard Test Methods for Chemical Analysis of High-Temperature Electrical, Magnetic, and Other Similar Iron, Nickel, and Cobalt Alloys1ASTM International, 100 Barr Harbor Drive, West Conshohocken, Pennsylvania 19428-2959. www.astm.org2 API STANDARD 6ACRAASTME1019, Standard Test Met
46、hods for Determination of Carbon, Sulfur, Nitrogen, and Oxygen in Steel, Iron, Nickel, and Cobalt Alloys by Various Combustion and Fusion TechniquesASTME1086, Standard Test Method for Analysis of Austenitic Stainless Steel by Spark Atomic Emission SpectrometryASTME1181, Standard Test Methods for Cha
47、racterizing Duplex Grain SizesASTME1473, Standard Test Methods for Chemical Analysis of Nickel, Cobalt, and High-Temperature AlloysASTME1823, Standard Terminology Relating to Fatigue and Fracture TestingASTME2465, Standard Test Method for Analysis of Ni-Base Alloys by Wavelength Dispersive X-Ray Flu
48、orescence SpectrometrySAE AMS 2750 2, PyrometryANSI/NACE MR0175 3, Petroleum and natural gas industriesMaterials for use in H2S-containing environments in oil and gas production3 Terms, Definitions, and Abbreviated Terms3.1 Terms and DefinitionsFor the purposes of this document, the following defini
49、tions apply.3.1.1 deleterious phasesPhases present in the microstructure of an alloy that have a negative effect on the desired mechanical properties, toughness, or corrosion resistance of the alloy. 3.1.2 field of viewA 0.008 in. (0.203 mm) 0.010 in. (0.254 mm) area of the microstructure.NOTE The 0.008 in. (0.203 mm) 0.010 in. (0.254 mm) area is representative of the area shown in a 4 in. (102 mm) 5 in. (127 mm) photomicrograph taken at 500X.3.1.3 heat treat lotMaterial from the same remelt ingot; processed together using the same procedures and hot/cold work equipment; same no
