1、- DOD-A-17254A 20 W 7777706 0190155 7 m E- 20 47 IMETRICI DOD-A-l7254A(SH) 23 August 1985 SUPERSEDING MIL-A-l7254(SHIPS) 30 June 1952 (See 6.5) MILITARY SPECIFICATION ANCHORS, NAVY, LIGHTWEIGHT (HADFIELD MANGANESE CAST STEEL LOW MAGNETIC PERMEABILITY) (METRIC) This specification is approved for use
2、by the Naval Sea Systems Command, Department of the Navy, and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers low magnetic permeability, high holding power, non-fouling, lightweight (LWT) anchors for use on ships or boa
3、ts. 1.2 Classification. The anchors shall be of the following weights, as spec-ified (see 6.2.1): Nominal weight Pounds Kilograms (kg) 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications and standards. Unless otherwise specified, the following specifications and standards of the i
4、ssue listed in that issue of the Department of Defense Index of Specifications and Standards (DoDISS) specified in the solicitation form a part of this specification to the extent specified herein. Beneficial c.omments (recommendations, additions, deletions) and any pertinent data whic.h may be of u
5、se in improving this document should be addressed to: Commander, Naval Sea Systems Command, SEA 5523, Department of the Navy, Washington, DC 20362-5101 by usine; the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. FSC 20
6、40 DISTRIBUTION STATEMENT A Approved for public release; distribution unlimited THIS DOCUMENT CONTAINS 9 PAGES Licensed by Information Handling ServicesProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- -_ DOD-A-1725YA 20 7777706 0170l156 7 W DOD-A-l72
7、54A(SH) I SPECIFICATIONS FEDERAL - TT-V-5 1 - Varnish, Asphalt. MILITARY MIL-C-450 - Coating Compound, Bituminous Solvent Type, MIL-1-17214 - Indicator, Permeability; Low-Mu (Go-No Go). MIL-S-17249 MIL-S-17758 - Steel Bar and Steel Forging, Nickel Modified Black (for Ammunition). - Steel Casting, Ha
8、dfield Manganese (Low Magnetic Permeability). Hadfield and Nickel-Molybdenum Modified Hadf ield. . STANDARDS MILITARY MIL-STD-105 MIL-STD-129 -Marking for Shipment and Storage. MIL-STD-1186 - Cushioning, Anchoring, Bracing, Blocking and - Sampling Procedures and Tables for Inspection by Attributes.
9、Waterproofing; with Appropriate Test Methods. 2.2 Other publications, The following documents form a part of this specification to the extent specified herein. The issues of the documents which are indicated as DoD adopted shall be the issue listed in the current DoDISS and the supplement thereto, i
10、f applicable. 2.1.2 Government drawing. The following Government drawing forms a part of this specification to the extent specified herein. DRAWING NAVAL SEA SYSTEMS COMMAND (NAVSEA) 803-632566 - Mark II, Lightweight Type (LWT) Anchor Assembly and Details. (Copies of specifications, standards and dr
11、awings required by contrmtors in connection with specific acquisition functions should be obtained from the contracting activity or as direc-ted by the contracting officer.) 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AMERICAN SOCIETY FOR TESTI
12、NG AND MATERIALS (ASTM) (DoD adopted) A 153 - Standard Specification for Zinc Coating (Hot-Dip) B 150 - Standard Specification for Aluminum Bronze Rod, B 633 - Standard Specification for Electrodeposited B 695 - Standard Specification for Coatings of Zinc. on Iron and Steel Hardware. Bar, and Shapes
13、. (DoD adopted) Coatings of Zinc on Iron and Steel. (DoD adopted) Mec.hanically Deposited on Iron and Steel. (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) ASSOCIATION OF AMERICAN RAILROADS Association of Amer
14、ican Railroads Rules Governing the Loading of Commodities on Open Top Cars (Applc.ation for copies should be addressed to the Association of American Railroads, Operations and Maintename Department, Mechanical Division, 59 East Van Buren Street, Chicago, IL 60605.) NATIONAL MOTOR FREIGHT TRAFFIC ASS
15、OCIATION, INC., AGENT National Motor Freight Classification (Application for copies should be addressed to the National Motor Freight Traffic Association, Inc., ATA TRAFFIC Dept., 1616 “P“ Street, NW, Washington, DC 20036.) UNIFORM CLASSIFICATION COMMITTEE AGENT Uniform Freight Classification Rating
16、s, Rules and Regulations (Application for copies should be addressed to the Uniform Classification Committee Agent, Tariff Publication Officer, Room 1106, 222 South Riverside Plaza, Chicago, IL 60606.) (Industry association specifications and standards are generally available They are also distribut
17、ed among technical groups for reference from libraries. and using Federal agencies.) 2.3 Order of precedence. In the event of a conflict between the text of this Specification and the references cited herein, the text of this specifica- tion shall take precedence. 3. REQUIREMENTS 3.1 Material. 3.1.1
18、 Anchor. The anchor crown, flukes, shank, and stock for all weights shall be steel castings in accordance with MIL-S-17249. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-e 3.1.2 3.1.2.1 Weights 30 pounds (14 kg) and 75 pounds (34 kg). The shackle
19、 and Anchor shackle and shackle pin. pin shall be forged aluminum bronze in accordance with composition C62300 or C63200 of ASTM B 150. The dimensions, proof load, and breaking load shall be in accordance with Drawing 803-632566. 3.1.2.2 Weights 500 pounds (227 kg) and 1,500 pounds (680 kg). The sha
20、ckle and pin shall be forged steel of Hadfield austenitic grade, hot rolled conforming to the chemical composition and mechanical limits of alloy 2 in accordance with MIL-S-17 7 58. 3.1.3 Key pins, split keys, and rings. Key pins, split keys, and rings shall be made from aluminum bronze in accordanc
21、e with ASTM B 150, or austenitic stainless steel, having a magnetic permeability less than 1.30. 3.1.4 Chain. The chain shall be close link type and shall be aluminum bronze in accordance with ACTM B 150, or austenitic stainless steel, having a magnetic permeability less than 1.30, and of size and l
22、ength as specified on Drawing 803-632566. 3.1.5 Recovered materials. Unless otherwise specified herein, all equipment, material, and articles incorporated in the products covered by this specification shall be new and may be fabricated using materials produced from recovered materials to the maximum
23、 extent practicable without jeopardizing the intended use. The term “recovered materials“ means materials which have been collected or recovered from solid waste and reprocessed to become a source of raw materials, as opposed to virgin raw materials. None of the above shall be interpreted to mean th
24、at the use of used or rebuilt products is allowed under this specifieation unless otherwise specifically specified. 3.2 Description. The anchor shall consist essentially of a long shank and two sharp, double-swinging flukes with the stock located at the crown end of the anchor. Anchors shall be furn
25、ished complete, including shackle and shackle pin, with all parts properly fitted and assembled. 3.3 Design,and dimensions. The anchor assembly, including shackle and shackle pin, shall comply with the design and dimensions specified on Drawing 803-632566. 3.4 Weight tolerance. The weight shall be n
26、ot more than 4 percent or less than 2 percent of the actual weight of the anchors with shackles shown in table I. TABLE I. Anchor weight. Nominal weight 30 pounds (14 kg) 32.73 pounds (15 kg) 75 pounds (34 kg) 76.61 pounds (35 kg) 500 pounds (227 kg) 521.8 pounds (237 kg) 1,500 pounds (680 kg) 1,644
27、 pounds (746 kg) Actual weight with shackle I I I 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DOD-A-37254A 20 7937706 0330357 4 3.5 Heat treatment. The castings shall be heat-treated in accordance with MIL-S-17 249. 3.6 Markings. The anchors sh
28、all be marked as specified on Drawing 803-632566. The legend shall also contain the letters “N-M“ to designate low magiietc. permeability. When size of anchor prohibits marking as shown on the applicable drawing, marking by stamping is authorized. Stamping dies shall be of the round bottom, low stre
29、ss type. Stamped letters shall be of the maximum practical height permitted by the shank being marked. Stamping shall not exceed 60 mils (1.5 millimeters (mm) in relief. 3.7 Finish. 3.7.1 Weights 30 pounds (14 kg) and 75 pounds (34 kg), inclusive. The entire surface of all parts, except shackle and
30、pins, shall be zinc-coated. If the hotdip process is used, the coating shall be applied in accordance with ASTM A 153, class A. If the electrodeposited process is used, the coating shall be in accordame with ASTM B 633, class Fe/Zn25, type II. If the mechanical deposited process is used, the coating
31、 shall be in accordance with ASTM B 695, class 25, type II. 3.7.2 Weights 500 pounds (227 kg) and 1,500 pounds (680 kg), inclusive. Surfaces of all exposed parts shall be coated with one coat of black asphalt varnish conforming to TT-V-51 or type I of MIL-C-450. 3.8 Workmanship. The workmanship shal
32、l be free from imperfections which may impair appearance or serviceability. 3.9 Magnetic permeability. The magnetic permeability of all parts of the anchor shall not exceed 1.30. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase
33、 order, the contractor is responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified in the contract or purchase order, the contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified
34、herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. 4.1.1 Certification data reports. The contr
35、actor shall prepare certified test reports, inspection data, and identification of the anchor and attachments in accordance with the data ordering document included in the contract (see 6.2.2). The report shall contain the statement “Records are available covering heat number of material, processing
36、, heat treatment, chemistry, mechanical properties, and proof test.“ 4.1.2 Inspection system. The contractor inspection system as specified in the contract shall provide and maintain an or order (see 6.2.1). 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from
37、IHS-,-,-DOD-A-17254A 20 m 777770b O17OLbO O M DOD-A-l7254A(SH) 4.2 4.2.1 - Lot. Sampling for quality conformance inspection. 4.2,l.l shackle.and pins. Forgings for 500 pounds (227 kg) and 1,500 pounds (680 kg) anchor A lot shall consist of material manufactured from the same heat . 4.2.1.2 Castings.
38、 as specified in MIL-S-17249. A lot shall consist of castings made from the same heat 4.2.1.3 Chemical analysis of forgings for 500 pounds (227 kg) and 1,500 A lot shall consist of all forgings pounds (680 kg) anchor shackle and pins. from the same heat. 4.2.1.4 Chemical analysis of castings. A lot
39、shall consist of castings as specified in MIL-S-17249. 4.2.1.5 Assembled anchor. A lot shall consist of assembled anchors of the same size offered for inspection at the same time. 4.3 Sampling or visual and dimensional examination. Sampling for visual and dimensional examination for normal inspectio
40、n and lot acceptance criteria shall comply with MIL-STD-105 and an AQL of 2.5 percent defective. .4,3.1 Sampling for nominal weight, Sampling for nominal weight examinatton e for normal inspection and lot acceptance criteria shall comply with MIL-STD-105 and an AQL of 2.5 percent defective. 4.3.2 Sa
41、mpling for chemical analysis. 4.3.2.1 Castings. accordance with MIL-S-17249. Sampling for chemical analysis of castings shall be in 4.3.2.2 Forgings. Samples for chemical analysis of forgings, for 500 pounds (227 kg) and 1,500 pounds (680 kg) anchor shackles, shall be taken from the same lot which c
42、onsists of material manufactured from the same heat. . 4.3.3 Sampling for tension tests on castings. Casting samples shall be in accordance with MIL-S-17249. Two samples for the tension test shall be taken from each lot. 4.3.4 Sampling for tension tests on forgings. For all forged parts, except shac
43、kles and pins for anchors with a weight of 30 pounds (14 kg) and 75 pounds (34 kg), two samples for the tension test shall be taken from each lot. 4.4 Examination. 4.4.1 Visual and dimensional examinations. Anchors selected in accordance with 4.3 shall be visually and dimensionally examined, both pr
44、ior to and after painting, for defects in manufacturing and workmanship to verify compliance with this specification. defects shall be rejected and if the number of defective anchors in any sample Any anchor containing one or more visual or dimensional 6 Provided by IHSNot for ResaleNo reproduction
45、or networking permitted without license from IHS-,-,-DOD-A-17254A 20 7979706 0170LbL 2 exceeds the acceptable number or that sample, the entire lot represented by the sample shall be rejected. Rejected lots may be offered again for inspection provided the contractor has removed all nonconforming anc
46、hors. Samples shall again be selected from such rejected lots and re-examined to verify compliance with this specification. 4.4.1.1 Shank. Radii on the corners of the shanks shall be examined to assure a smooth curve, free from irregularities. The stop on the shank shall make full surface contact wi
47、th the boss in the crown when the flukes are in the operating position. 4.4.2 Determination of weight. Each anchor of the sample shall have its weight determined to verify compliance with 3.4. limits shall be rejected. If the number of defective anchors in any sample (see 4.3.1) exceeds the acceptab
48、le number for that sample, the entire lot repre- sented by the sample shall be rejected. Rejected lots may be resubmitted for inspection only after the contrac-tor has removed all nonconforming anchors. Samples shall again be selected from such rejected lots and re-examined to verify compliance with
49、 the requirement;. Anchors exceeding the tolerance 4.4.3 Magnetic permeability. Inspect all parts of each anchor with an approved magnetic permeability indicator in accordance with MIL-1-17214, Measure- ments shall be made on a Go-No Go basis. Rejected parts may be resubmitted for inspection only after the contractor has remedied the defects found. 4.5 Test procedures. 4.5.1 Chemical and mechanical tests. Chemical and mechanical tests shall
