1、DOD-A-25707D 20 999990b 0290034 b m DOD-A-15707D(NAVY)L/ 25 October 1978 SUPERCEDIXG MIL-A- 15 7 O 7C (NAVY 1, 17 October 1956 (See 6.6) MILITARY SPECIFICATION ANCHORS , NAVY , LIGHTWEIGHT TYPE (METRIC) This specification is approved for use by all interested Con- mands of the Department of the Navy
2、 and the Marine Corps and is available for use by all other Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scoy. . This specification covers high holding power, nonfouling, lightweight- type (LWT) anc ors for use on ships or boats. 1.2 Classification. The anchors shall be of the
3、 following masses, as specified (see 6.2.1): Nominal masses kilograms (kg)-pounds (lbs) 4 (8) i00 (200) 1,250 (2,500) 8 (16) 150 (300) 1,500 (3,000) 15 (30) 250 (500) 2,000 (4,000) 25 (50) 370 (750) 2,500 (5,000) 37 (75) 500 (1,000) 3,000 (6,000) 50 (100) 750 (1,500) 5,000 (10,000) 75 (150) 1,000 (2
4、,000) 6,500 (13,000) 2. APPLICABLE DOCUMENTS 2.1 Issues of documents. The following documents, of the issue in effect on date of invitation-i= or request for proposal, form a part of this specification to the extent specified herein. SPECIFICATIONS FEDERAL RR-C-271 - Chains and Attachmnts, Welded an
5、d Weldless. TT-V-51 - Varnish: Asphalt. MIL-C-450 - Coating Compound, Bituminous Solvent we, Black (For Ammunition). MIL-E-22200/1 - Electrode, Welding, Mineral Covered, Iron Powder, Low- Hydrogen Medium and High Tensile Steel As Welded or Stress- Relieved Weld Application. MIL-1-45208 - Inspection
6、System Requirements. MILITARY STANDARDS MILITARY MIL-CTD-129 - Marking for Shipment and Storage. MIL-STD-248 - Welding and Brazing Procedure and Performance Qualification. . MIL-STD-271 - Nondestructive Testing Requirements for Metals. MIL-STD-1186 - Cushioning, Anchoring, Bracing, Blocking, and Wat
7、erproofing; with Appropriate Test Methods. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addresses to: Commander, Naval Ship Engineering Center, SEC 6124, Department of the Kavy, Washington, DC 20362 by usi
8、ng the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. FSC 2040 /THIS DOCUMENT CONTAINS % PAGES. q Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_I- DOD-A-15707D 20 - 7
9、779706 0190035 ! - I DOD-A-15707D (NAVY) PUBLICATION MILITARY NAVAL SEA SYSTEMS COMMAND NAVSEA 0900-LP-003-8000 - Metals, Surface Standards. DRAWING MILITARY Inspection Acceptance NAVAL SHIP SYSTEMS COMMAND (now NAVSEA) NAVSHIPS 803-632566 - Mark II, Lightweight Type (LWT) Anchor Assembly and Detail
10、s. (Copies of specif ications , standards , drawings , and publications required by contractors in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting officer). 2.2 Other ublications. The following documents form a part of
11、 this specification . to the ext-pbin. invitation for bids or request for proposal shall apply. Unless otherwise indicated, the issue in effect on date of AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) A 27 - Mild-to Medium-Strength Carbon Steel Castings for General Application. A 370 - Mechanica
12、l Testing of Steel Products. A 575 - Merchant Quality Hot-Rolled Carbon Steel Bars. A 668 - Steel Forgings, Carbon and Alloy, for General Industrial Use. B 454 - Mechanically Deposited Coating of Cadmium and Zinc on Ferrous Metals. E 112 - Average Grain Size of Metals. .(Application for copies shoul
13、d be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, Pennsylvania 19103.) ASSOCIATION OF AMERICAN RAILROADS Association of American Railroads Rules Governing the Loadino of Comdities On Open Top Cars (Application for copies should be addressed to the Asso
14、ciation of American Railroads, Operations and Maintenance Department, Mechanical Division, 59 East Van Buren Street, Chicago, Illinois 60605.) NATIONAL MOTOR FREIGHT CLASSIFICATION National Motor Freight Traffic Association Classes and Rules Association, Inc., Agent, 1616 P Street, N.W., Washington,
15、 DC 20036.) (Application for copies should be addressed to the National Motor Freight Traffic UNIFORM CLASSIFICATION COMMITTEE Uniform Freight Classification Ratings, Rules, and Regulations (Application for copies should be addressed to the Uniform Classification Committee Agent, G. F. Earl, TariffP
16、ublication Officer, Room 1106, 222 South Riverside Plaza, Chicago, Illinois 60606.) available for reference from libraries. They are also distributed among technical groups and using Federal agencies.) in the customary inch-pound system. conversion to metric units shall be required. (Technical socie
17、ty and technical association specifications and standards are generally 2.3 Publications and specifications referenced herein may express masses and measures For utilization of the data contained therein, 3. REQUIREMENTS 3.1 Material. 3.1.1 Anchor crown and flukes. Anchor crown and flukes shall be s
18、teel castings in accordance wlth ASTm7.Castings shall be heat-treated by normalizing and tempering to obtain the mechanical properties listed in table I. The manufacturer shall determine the Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DOD-A-15707
19、D 20 9777906 0190036 T Mechanical properties Tensile strength Yield point DOD-A-15 70 7D (NAVY) detailed procedures to be used. E 112 grain size of 6. shall be subject to rejection. The miscrostructure specimen shall have a minimum ASTM Material having a grain size number less than 6 (larger grain s
20、ize) Anchor mass 4-6,500 kg (8-*13,000 lbs) 4,921 kg/cm2 (70,000 lb/in2) 2,812 kg/cm2 (40,000 lb/in2) TABLE I. Mechanical properties. 3.1.2 Anchor shank, shackle and shackle pin. Anchor shanks, shackles, and shackle pins shall bmedel-accoraance with ASTM A668, class Dl normalized and tempered. 3.1.2
21、.1 Test blocks. Test blocks for forgings shall be made from prolongs in accord- ance with ASTM A 370. Specimens shall be taken at 1/4T of prolong, with the prolong having minimum dimensions of T by T by W, where T and W are the thickness and width, respectively of the largest cross section. 3.1.3 St
22、ock. The stock for all sizes of anchor shall be either steel casting in accordance with ASTM A 27 or bar stock forging in accordance with ASTM A 668, class D, normalized and tempered. Castings shall be heat-treated by normalizing and tempering and shall conform to 3.1.1.1, if applicable. In either c
23、ase (casting or forging), the stock shall attain the mechanical properties in table I. The stock shall not be required to undergo microstructure examination. 3.1.4 Key pin;, split keys, and rings. Key pins, split keys, and rings shall be made of carbon steel con orming to ASTM575. 3.1.5 Chain. Chain
24、 shall be the close link type and shall be in accordance with 3.2 Descri tion. The anchor shall consist essentially of a long shank and two sharp, RR-C-271, grade, class 2. double-swies with the stock located at the crown end of the anchor. shall be furnished complete, including shackle and shackle
25、pin, with all parts properly fitted and assembled. shall comply withthe design and dimensions shown on NAVSHIPS Drawing 803-632566. Anchors 3.3 Design and dimensions. 3.3.1 Round bar mass tolerance. If bar stock is specified as the material for the The anchor assembly, includinq shackle and shackle
26、pin, stock (see 3n,themal mass of the anchor assembly may be increased by the difference between the mass of the stock as a casting and the mass of the stock as a round bar. 3.4 Magnetic particle inspection. 3.4.1 General. The anchor proper and all components of the anchor assembly shall be subjecte
27、d to-ic particle examination. Examinations shall be performed after proof 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- / DOD-A-35707D 20 7779706 0370037 3 m DOD-A-15 707D (NAVY) loading on the finished components and prior to any zinc coating o
28、r painting. Special attention shall be given to the following: (a) fluke surfaces from the tip up to and including radii at the (b) junction where the shank and stock meet; (c) crown bearing area that acts as a stop for the shank; (d) shackle pin area and shank in the vicinity of the shackle pin; (e
29、) the shackle at bend and pin hole; (f) and all welds in the anchor assembly. junction with the crown; 3.4.2 Acceptance criteria for mametic particle inspection castings exceed the following limitations: (1) 4.76-mm (0.187-in.) maximum buildup for design thickness 25.4 mm (1 in.) (2) 20 percent maxi
30、mum buildup for design thickness over 25.4-mm (1 in.) (3) contouring (such as grinding or machining) for discontinuities shall and under; but not to exceed 9.52 mm (0.375 in.) unless approved; blend into adjacent material and shall not reduce the thickness of the material below minimum design requir
31、ements. 3.4.3.1.2 Nominal weld re airs. Repair welds in excess of those specified as minor 3.4.3.2 Repait- weld ins ection. repairs shall be-n-iththe approval of the Government representative. Repair welds shall be subjected to the same inspec- tion standards requiredf th: casting and the area shall
32、 be suitably marked to facilitate inspection. 3.5 Proof load. Anchors shall comply with the proof load test requirements of 4.5.3. of this test. when offerdnspection. Anchors which are repair welded shall be proof load tested afterwards. Therehallbe no permanent deformation of any part of the anchor
33、 upon completion 3.6 Cleanin . The castings and forgings shall be cleaned for proper adhesion of finish 3.7 Identification markings. Shanks shall bear the legend specified on the applicable drawing (see 3.3) . 3.8 Finish. 3.8.1 Anchor mass from 4 & to 50 3 (8 to 100 lbs.), inclusive. Surfaces of all
34、 exposed partclbezlnc-catedxy%e meEhzix =esc in accordance with ASTM B 454, class 40. The zinc coating shall be adherent, uniform, smooth, and free from uncoated spots, injurious bumps, pits, blisters, gritty areas, acid and black spots, dross, and flux. 4 Provided by IHSNot for ResaleNo reproductio
35、n or networking permitted without license from IHS-,-,-DOD-A-15707D 20 W 9799906 0190038 3 W Number of anchors in inspection lot I DOD-A-l5707D(NAVY) 3.8.2 Anchor mass over 50 & (100 lbs). Surfaces of all exposed parts shall be coated with one coatlackaltvarniconforming to TT-V-51, type I or MIL-C-4
36、50. 3.9 Workmanship. The workmanship shall be free from imperfections which may impair appearance or serviceability. 4. QUALITY ASSURANCE PROVISIONS 4.1 Res onsibilit for ins ection. Unless otherwise specified in the contract, the contractor isPresponsibfe-?rhrmance of all inspection requirements as
37、 specified herein. Except as otherwise specified in the contract, the contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. any of the inspections set forth in the specification where suc
38、h inspections are deemed necessary to assure supplies and services conform to prescribed requirements. inspection data, and identification of the anchor and attachments in accordance with the data ordering document included in the contract (see 6.2.2). statement: “Records are available covering heat
39、 number of material, processing, heat treat- ment, chemistry, mechanical properties, magnetic particle inspection, and proof test.“ A copy of certification documents are to be sent to the consignee and the contracting activity or as otherwise specified. system acceptable to the Government for suppli
40、es and services covered by this specification. The inspection system shall be in accordance with MIL-1-45208 (see 6.2.1). The Government reserves the right to perform 4.1.1 Certification data/reports. The contractor shall prepare certified test reports, The report shall contain the 4.1.2 Inspection
41、system. The contractor shall provide and maintain an inspection 4.2 Sampling for guality conformance inspection. Number of anchors in sample 4.2.1 Lot. 1 2 4.2.1.1 Castings. A lot shall consist of castings made from the same heat. Where material cannot be identified by heat, it shall be divided into
42、 lots of not more than 500 kg (1,000 lbs.) each, except where a single casting has a mass of more than 500 kg. A lot shall consist of material manufactured from the same heat. 4.2.1.2 Forgings. 4.2.1.3 Chemical analysis forgings. A lot shall consist of all forgings from the same heat. 4.2.1.4 Chemic
43、al analysis castings. A lot shall consist of castings of one class made from the same heat, heat-treated in the same furnace charge, and offered for inspec- tion at one time. 4.2.1.5 Assembled anchor. A lot shall consist of assembled anchors of the same size offered for inspection atsame time. 4.3 S
44、amplinq for lot acceptance. 4.3.1 Sam lin for visual and dimensional examination. Sampling for visual and dimen- sional examination %mowpGce criteria shall comply with table II. TABLE II. Sampling for visual and dimensional examination AQL (approx.) = 2.5 percent defective. Acceptance Rejection (def
45、ectives) (de fectives) number 25 and under 26 to 40 41 to 110 111 to 300 301 to 500 501 to 800 801 and over 10 15 25 35 50 75 110 2 3 4 5 7 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DOD-A-15 7 O 7D (NAVY) acceptance crit:riasMl- wx table III.
46、 4.3.2 Sam lin for nominal mass. Sampling for nominal mass examination and lot Number of anchors in inspection lot Number of Acceptance sample ( defectives) anchor in Rejection number (defectives) 40 and under 41 to 110 111 to 300 301 to 500 501 to 800 801 and over 5 10 15 25 35 50 O O 1 1 2 3 1 1 2
47、 2 3 4 4.3.3 Sam lin for m netic article test. Sampling for the magnetic particle test 4.3.4 Samplinq for chmical analysis. 4.3.4.1 Castings. Where material cannot be identified by heat, it shall be divided shall be 100 pe:cen! for ksexcept thatpins shall not be subjected to this test. .C into lots
48、of not more than 500 kg (1,000 lbs.), except where a single casting has a mass of more than 500 kg. One sample shall be obtained from each lot for chemical analysis and these samples shall be analyzed individually. the .same lot, which consists of material manufactured from the same heat. estimated
49、mass of 250% (500sTand over, one safE t e tension test shall be taken to represent each casting. For castings with an estimated mass less than 250 kg (500 lbs.), two samples for the tension test shall be taken from each lot. Microstructure examination for castings shall be performed on a specimen taken from the test block adjacent to the tensile specimen and away from the surface of the test block. 4.3.4.2 Fofgings. 4.3.5 Sam lin for tension and microstructure tests
