1、Comments, suggestions, or questions on this document should be addressed to: Commander, Naval Sea Systems Command, ATTN: SEA 05S, 1333 Isaac Hull Avenue, SE, Stop 5160, Washington Navy Yard DC 20376-5160 or emailed to CommandStandardsnavy.mil, with the subject line “Document Comment”. Since contact
2、information can change, you may want to verify the currency of this address information using the ASSIST Online database at https:/assist.dla.mil. AMSC N/A FSC 9530 INCH-POUND MIL-DTL-32477 22 October 2013 DETAIL SPECIFICATION ROD AND BAR, COBALT-NICKEL-CHROMIUM-IRON-MOLYBDENUM ALLOY, FOR USE IN CRI
3、TICAL SEAWATER APPLICATIONS This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers solution annealed and cold worked, and solution annealed, cold worked and age hardened cobalt-nickel-chromium-iron-molybdenum
4、 alloy rod (see 6.5.2) and bar (see 6.5.1) up to and including 3.50 inches in diameter or thickness for use in critical seawater applications. 1.2 Classification. Bar and rod are of the following form, grade, and finish, as specified (see 6.2). 1.2.1 Forms. Cobalt-nickel-chromium-iron-molybdenum all
5、oy comes in the following forms: a. Rod b. Bar, round c. Bar, hexagonal d. Bar, octagonal e. Bar, square f. Bar, rectangular 1.2.2 Grades. Cobalt-nickel-chromium-iron-molybdenum alloy comes in the following grades: a. Grade 1 Solution annealed and cold worked b. Grade 2 Solution annealed, cold worke
6、d, and age hardened 1.2.3 Finishes. Cobalt-nickel-chromium-iron-molybdenum alloy comes in the following finishes: a. As cold worked b. Rough turned or rough ground (rounds) c. Semi-smoothed machined (rounds) d. Smooth finish machined (rounds) e. Bright finished f. Pickled Provided by IHSNot for Resa
7、leNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32477 2 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3, 4, or 5 of this specification. This section does not include documents cited in other sections of this specifi
8、cation or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements of documents cited in sections 3, 4, or 5 of this specification, whether or not they
9、are listed. 2.2 Government documents. 2.2.1 Other Government documents, drawings, and publications. The following other Government documents, drawings, and publications form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those ci
10、ted in the solicitation or contract. NAVAL SEA SYSTEMS COMMAND (NAVSEA) PUBLICATIONS T9074-AS-GIB-010/271 - Requirements for Nondestructive Testing Methods (Copies of this document are available online at https:/nll.ahf.nmci.navy.mil. This publication can be located by searching the Navy Publication
11、s Index for the TMIN without the suffix.) 2.3 Non-Government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. ASTM INTERNATIONAL ASTM E3 - Stan
12、dard Guide for Preparation of Metallographic Specimens ASTM E8/E8M - Standard Test Methods for Tension Testing of Metallic Materials ASTM E18 - Standard Test Methods for Rockwell Hardness of Metallic Materials ASTM E23 - Standard Test Method for Notched Bar Impact Testing of Metallic Materials ASTM
13、E29 - Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications ASTM E112 - Standard Test Methods for Determining Average Grain Size ASTM E354 - Standard Test Methods for Chemical Analysis of High Temperature, Electrical, Magnetic, and Other Similar Iro
14、n, Nickel, and Cobalt Alloys ASTM E399 - Standard Test Method for Linear-Elastic Plane-Strain Fracture Toughness KIc of Metallic Materials ASTM E407 - Standard Practice for Microetching Metals and Alloys ASTM E1019 - Standard Test Methods for Determination of Carbon, Sulfur, Nitrogen, and Oxygen in
15、Steel, Iron, Nickel, and Cobalt Alloys by Various Combustion and Fusion Techniques ASTM E1473 - Standard Test Methods for Chemical Analysis of Nickel, Cobalt, and High Temperature Alloys ASTM E1820 - Standard Test Method for Measurement of Fracture Toughness (Copies of these documents are available
16、from ASTM International, 100 Barr Harbor Dr., PO Box C700, West Conshohocken, PA 19428-2959 or online at www.astm.org.) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32477 3 SAE INTERNATIONAL SAE-AMS2261 - Tolerances, Nickel, Nickel Alloy,
17、and Cobalt Alloy Bars, Rods, and Wire SAE-AMS2750 - Pyrometry SAE-AMS2806 - Identification, Bars, Wire, Mechanical Tubing, Extrusions, Carbon and Alloy Steels and Corrosion and Heat-Resistant Steels and Alloys (Copies of these documents are available from SAE World Headquarters, 400 Commonwealth Dri
18、ve, Warrendale, PA 15096-0001 or online at www.sae.org.) 2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, howe
19、ver, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article. Unless otherwise specified (see 6.2), a sample shall be subjected to first article inspection in accordance with 4.2 and test results shall be submitted as specified (see
20、 6.2 and 6.3). The following information shall accompany the test results: a. Melt source. b. Melting, refining, and degassing procedures including furnace atmosphere, slag composition, pouring temperatures (when applicable), furnace controls, refining process parameters and controls, ingot size, an
21、d ingot handling procedures. c. Aim chemistries and an internal chemical composition range including aim and range percentages for major alloying elements and maximum percentages for the remaining elements. d. Cropping procedure to ensure that all finished material will meet specification requiremen
22、ts. e. Heat treatment procedures including the purpose of the heat treatment, heating rates, holding temperatures, time at temperature, cooling method, furnace atmosphere, accuracy and uniformity of the temperatures of the furnaces used, furnace survey method, and survey frequency. f. Forging, rolli
23、ng, and hot working procedures, including the minimum and maximum processing temperatures and percent reduction for each step. g. Percent reduction obtained by cold working the solution annealed billet to the final product. h. Any lubricating, de-scaling, cleaning, and pickling procedures used durin
24、g manufacture. The above shall govern the manufacturer of all future materials unless otherwise approved by NAVSEA. 3.2 Material processing. The manufacturer shall document the material processing and heat treatment facilities and procedures used to produce the products for first article testing (se
25、e 6.3), and these same material processing and heat treatment facilities and procedures shall be used in the production of all product supplied to this specification. The manufacturing procedures used shall be controlled procedures and are subject to audit by NAVSEA or its authorized representative.
26、 3.2.1 Recycled, recovered, environmentally preferable, or biobased materials. Recycled, recovered, environmentally preferable, or biobased materials should be used to the maximum extent possible, provided that the material meets or exceeds the operational and maintenance requirements, and promotes
27、economically advantageous life cycle costs. 3.2.2 Processing. Material shall be produced by multiple melting using vacuum induction followed by vacuum consumable electrode melting. Cast ingots or billets shall be hot worked to a fine grain structure and solution annealed prior to cold working. Grade
28、 2 rod and bar shall be cold worked prior to aging. 3.2.3 Chemical composition. The heat analysis shall conform to the requirements in table I. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32477 4 TABLE I. Chemical composition requirements
29、. Elements 1/ Requirements, % (maximum unless a range or a minimum is indicated) Product (check) analysis variations, under minimum or over maximum, of the specified limit of the element, % 2/ Nickel Remainder - Cobalt 34.0 38.0 0.3 Chromium 18.0 20.0 0.25 Molybdenum 6.0 8.0 0.15 Iron 8.0 10.0 0.1 T
30、itanium 2.5 3.25 0.07 Aluminum 0.1 0.3 0.05 Niobium 0.25 0.75 0.05 Boron 0.03 0.005 Carbon 0.04 - Manganese 0.20 - Silicon 0.20 - Phosphorus 0.020 - Sulfur 0.010 - NOTES: 1/ Elements listed must make up 99.5% of total composition. 2/ Product check analysis variations are allowed only on a check anal
31、ysis done upon receipt inspection of the product supplied to this specification. 3.2.4 Heat treatment. Unless otherwise specified (see 6.2), heat treatment facilities and equipment utilized shall provide the system accuracy and temperature uniformity as specified in SAE-AMS2750. 3.2.4.1 Heat treatme
32、nt information. Manufacturers supplying Grade 2 materials shall include heat treatment information as part of the certification report (see 4.8). For batch-type furnaces used for aging heat treatment, the heat treatment information shall include all the information presented in figures 1 and 2 and a
33、 verification of inspection. 3.2.4.2 Working zone temperature uniformity. Working zone temperature uniformity shall be determined on batch type furnaces used for aging heat treatment of Grade 2 bar and rod in accordance with SAE-AMS2750, or as permitted in 3.2.4. 3.2.4.3 Contact thermocouples. Unles
34、s otherwise specified (see 6.2), for batch-type furnaces, a minimum of three thermocouples shall be attached to the furnace load. The hot junctions (or the caps of sheathed thermocouples) shall be in contact with the items. Provided by IHSNot for ResaleNo reproduction or networking permitted without
35、 license from IHS-,-,-MIL-DTL-32477 5 3.2.4.4 Heat treatment procedures. Both Grade 1 and Grade 2 rod and bar shall be solution heat treated by heating to a temperature within the range of 1900 to 1925 F, holding at the selected temperature within 25 F for 4 to 8 hours, and quenching in water prior
36、to cold working. After cold working, Grade 2 rod and bar less than or equal to 2.00 inches in diameter or thickness shall be aged by heating to a temperature within the range of 900 to 1100 F, holding at the selected temperature within 25 F for not less than 4 hours, and cooling at a rate equivalent
37、 to an air cool or faster. Grade 2 rod and bar greater than 2.00 inches up to 3.50 inches in diameter or thickness shall be aged by heating to a temperature in the range of 900 to 1225 F, holding at the selected temperature 25 F for not less than 4 hours, and cooling at a rate equivalent to an air c
38、ool or faster. When specified (see 6.2), manufacturers supplying Grade 1 rod and bar shall perform the latter aging heat treatment(s) on one sample selected at random from each lot prior to shipping and demonstrate the capability of conformance to the tensile property requirements in table II, the h
39、ardness requirements for Grade 2 in table III, and the impact and fracture toughness requirements in table IV and provide results with the certificate of conformance (see 4.8). 3.2.5 Detrimental material controls. 3.2.5.1 Low melting point materials. Contact with antimony, bismuth, cadmium, lead, ti
40、n, zinc, and consumable products, such as lubricants and marking materials, containing these low melting point materials in excess of 250 parts per million (ppm) each, shall be prohibited. This prohibition on low melting point materials applies during thermal treatments and to the finished or cleane
41、d surfaces of the material offered for acceptance. Products do not need to be analyzed when product manufacturers certify that low melting point materials in excess of 250 ppm are not present in the products. A product containing low melting point materials, only in the form of stable chemical compo
42、unds which do not melt or decompose below 2200 F, shall be exempt from this requirement. 3.2.5.2 Mercury. Contact with mercury and consumable products that contain more than 10 ppm mercury is prohibited. Products do not need to be analyzed when product manufacturers certify that mercury in excess of
43、 10 ppm is not present in the product, or certify that mercury and mercury compounds have not been added to the product and have not come in contact with the product during processing. 3.2.5.3 Paint prohibition. Paint shall not be used for marking. 3.3 Dimensional tolerances. Dimensional tolerances
44、of the rod and bar shall be in accordance with all applicable requirements of SAE-AMS2261. 3.4 Identification marking. Identification and marking of the rod and bar shall be in accordance with SAE-AMS2806. 3.5 Workmanship. Rod and bar surfaces shall be free from defects harmful to the intended use,
45、such as laps, cracks, seams, scale, and fins. 3.6 Performance characteristics. 3.6.1 Soundness. Rod and bar shall be free from seams, pipe, cracks, and porosity. 3.6.2 Mechanical properties. Grade 1 rod and bar produced to this specification shall meet the hardness requirements specified on table II
46、I. Unless otherwise specified (see 6.2), Grade 1 bar and rod is not required to meet the tensile, hardness and impact, and fracture toughness property requirements for Grade 2 specified in tables II, III and IV, respectively. Grade 2 rod and bar produced to this specification shall meet the mechanic
47、al property requirements on tables II, III, and IV. Except for first article and conformance testing, where zero tolerance is required, the following tolerances may be applied upon receipt inspection of the product supplied to this specification to determine acceptability as part of the final accept
48、ance or verification procedures. a. Minimum measured yield strength shall be not less than 98 percent of the minimum specified value. b. Maximum measured yield strength shall be not more than 102 percent of the maximum specified value. c. Minimum measured tensile elongation shall be not less than 98
49、 percent of the minimum specified value. d. Minimum measured average CVN impact energy or fracture toughness shall be not less than 98 percent of minimum specified values. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32477 6 TABLE II. Tensile property requirements for grade 2. 1/ Tensile strength, ksi (minimum) Yield strength 0.2% offset, ksi Elongation (% in 4
