1、MIL-A-24 28 OA (SHIPS ) 11 December 1972 SUPERSEDING MIL-A-24280 (SHIPS) 21 April 1967 (See 6.6) MILITARY SPECIFICATION ANCHORS, MARINE FLUKED, LIGHT WEIGHT TYPE (LWT) , (30 DEGREES AND 50 DEGREES FLUKE ANGLES WITH WEDGE-BLOCK ADAPTERS), HIGH STRENGTH CAST STEEL 1. SCOPE 1.1 Scope. This specificatio
2、n covers high holding power, nonfouling, light weight type (LWT), high strength, cast steel anchors with variable fluke angles for use on ships or boats and for salvage applications. 1.2 Classification. The anchors shall be of the following nominal weights as specified (see 6.2). Nominal weight Poun
3、ds 10,000 20,000 6,000 16,000 30,000 14,000 25,000 2. APPLICABLE DOCUMENTS 2.1 The following documents of the issue in effect on date of invitation for bids or request for proposal, form a part of the specification to the extent specified herein. SPECIFICATIONS FEDERAL TT-V-51 - Varnish; Asphalt. MI
4、L-C-450 - Coating Compound, Bituminous Solvent Type, Black (For Ammunition). MIL-E-22200/1 - Electrodes, Welding, Mineral Covered, Iron-Power Low-Hydrogen MIL-E-22200/5 - Electrodes, Welding, Mineral Covered, Iron-Power, Low-Hydrogen, MIL-S-24093 - Steel Forgings, Carbon and Alloy Heat Treated. MILI
5、TARY Medium and High Tensile Steel, as Welded or Stress-Relieved Weld Application. Low-Alloy Steel for Hardening and Tempering Heat Treatment Applications Only. STANDARDS FEDERAL FED-STD-151 - Metals; Test Methods. MILITARY MIL-STD-129 - Marking for Shipment and Storage. MIL-STD-271 - Nondestructive
6、 Testing Requirements for Metals. DRAW1 N GS MILITARY 805-2482962 - Light Weight Type (LWT) Anchor (30 and 50 Fluke Angles with 805-2482963 - 6,000 Pound Light Weight Type (LWT) Anchor (30 and 50“ Fluke 805-2482964 - 10,000 Pound Light Weight Type (LWT) Anchor (30 and 50 Fluke 805-4355995 - 14,000 P
7、ound Light Weight Type (LWT) Anchor (30“ and 50 Fluke Wedge-Block Adapters) - Assembly. Angles with Wedge Block Adapters) - Details. Angles with Wedge Block Adapters) - Details. Angles with Wedge-Block Adapters) - Details. M THIS DOCUMENT CONTAINS I PAGES. FSC 2040 r 1?1 Provided by IHSNot for Resal
8、eNo reproduction or networking permitted without license from IHS-,-,-c MI LTTARY (continued) 805-4355996 - 16,000 Pound Light Weight Type (LWT) Anchor (30 and 50 Fluke 805-4355997 - 20,000 Pound Light Weight Type (LWT) Anchor (30 and 50 Fluke 805-4355998 - 25,000 Pound Light Weight Type (LWT) Ancho
9、r (30 and 50 Fluke 805-3355999 - 30,000 Pound Light Weight Type (LWT) Anchor (30 and 50 Fluke Angles with Wedge-Block Adapters) - Details. Angles with Wedge-Block Adapters) - Details, Angles with Wedge-Block Adapters) - Details. Angles with Wedge-Block Adapters) - Details PUBLICATIONS MILITARY NAVSH
10、IPS 0900-000-1000 - Fabrication, Welding and Inspection of Chips Hulls. (Copies of specifications, standards, drawings, and publications required by suppliers in connection with speaific procurement: functions should be obtained from the procuring activity or as directed by the contracting officer.)
11、 to the extmp-in. invitation for bids or request for proposal shall apply. i 2.2 Other ublications, The following documents form a part of this specification Unless otherwise indicated, the issue in effect on date of UNIFORM CLASSIFICATION COMMITTEE Uniform Freight: Classification Rules (Application
12、 for copies should be addressed to the uniform Classification Committee, WRICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) 222 South Riverside Plaza, Room 1106, Chicago, Illinois 60606.) A370-68 - Mechanical Testing of Steel Products, Methods and Deinitions for. (Application for copies should be addre
13、ssed to the American Society or Testing and Materials, 1916 Race Street, Philadelphia, Pennsylvania 19103.) National Motor Freight Classification Rules Association, Inc., 1616 P Street, N.W., Washington, D.C. 20036.) NATIONAL CLASSIFICATION BOARD (Application for copies should be addressed to the Na
14、tional Motor Freight Traffic ASSOCIATION OF AMERICAN RAILROADS RULES GOVERNING LOADING of COMMODITIES/FREIGHT ON/IN OPEN AND CLOSED CARS (Application for copies should be addressed to the Association of American Railroads, Operations and Maintenance Department, 59 East Van Euren Street, Chicago, Ill
15、inois 60605.) (Technical society and technical association specifications and standards are generally available for reference from libraries. They are also distributed among technical groups and using Federal agencies.) 3. REQUIREMENTS 3.1 Material, 3.1.1 Shank, crown, anl. indications over 1/8 inch
16、 length. comply with the requirements of NAVSHIPS 0900-000-1000. be weld repaired prior to heat treatment using type MIL-10018-NI of MIL-E-22200/5. repairs after heat treatment shall use MIL-9018-M or MIL-11018-M of MIL-E-22200/1. repairs shall be ground smooth to blend into the continguous cast sur
17、face. inspection shall be performed after final heat treatment and weld repairs and prior to painting. place read- service, shall be subjected to a proof test as specified in 4.6.4. magnitude of the proof load shall be that required for 80,000 pounds per square inch (p.s.ir) yield strength material
18、as specified in the table on Drawing 805-2482962. 3.8 Identification markin s. The anchors shall be marked with 1-inch letters and 1-1/8-inch numerals, as sdthe applicable drawing specified in 2.1. bo cut, stamped, or cast in place on the shank of the anchor. cut, such markings shall be completed pr
19、ior to the tempering heat treatment operation. 4 The castings shall then be 3.5.1.3 Temperin , Following cooling to ambient temperature, all castings should be The Type I castings shall be cooled 3.5.2 T e II castin s. Type II castings shall be heat treated by homogenizing, (if 3.5.2.1 It is recomme
20、nded that type II castings be given accelerated cooling for better Where it is required, the castings may be retempered 3.6 pignetic particle ins oction The castings shall be proven free of linear Discontininuities may be weld repaired. Weld repair shall Quenched and tempered anchors may Weld Weld M
21、agnetic particle 3.7 Proof. Each anchor assembled with shackles, pins, stock and wedge adapters in The The legend shall When markings are stamped or Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-as specif ied herein;- Except as otherwise specified
22、in the. contract or order, the-supplier may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in the specification where
23、 such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. 4.2 4.2.1 Lot. Sampling for quality conformance inspection. 4.2.1.1 castings. 4.2.1.2 Chemical anal sis of castings. A lot shall consist of castings made from the same heat. A lot shall consist
24、 of castings of one type made from the same heatdksze pouring of a ladle containing a number of crucible heats, heat-treated in the same furnace charge, and offered for inspection at one time. 4.2.2 Sam lin for visual and dimensional-examination. A random sample of anchors shall be seldk5 percent de
25、fective. Number of Number of Acceptance Rejection anchors in anchors in number number lot sample (defectives) (defectiv.es) - 40 and under 5 O 1* 41 to 110 10 O 1 111 to 300 15 1 2 301 to 500 25 1 2 501 to 800 35 2. . 3 801 and over 50 3 4 5 Provided by IHSNot for ResaleNo reproduction or networking
26、 permitted without license from IHS-,-,-_- MIL-A-242BOA 20 W 40b OL2838 b W 4.2.2.2 Sam lin for ma netic article ins ection of anchor parts. Each anchor part in every lot s level A requirements for stock pro- curements, level C requirements for immediate need procurements. # 5.2 Markin . In addition
27、 to any special marking(s) required (see 6.2) and 3.8, ship- 6. NOTES 6.1 Intended use. Cast steel marine anchors covered by this specification are intended 6.2 Ordering data. Procurement documents shall specify the following: for use on ships or-boats and for salvage operations and other similar ap
28、plications. (a) Title, number, and date of this specification. (b) Nominal weight of anchor required (see 1.2). (c) Special marking (s) required (see 5.2) . (d) That the nominal weight of anchor ordered will determine the price and no payment will be made for any excess of weight. # 6.3 Anchors cove
29、red by this specification are commonly referred to as “LWT Wedge-Block # 6.4 Homogenization. Homogenization is recommended for all castings where in the Model, High Strength.“ foundry practices exercise no other control over hydrogen in the melt. is performed, the castings shall be heated at a contr
30、olled rate to a temperature between 1850OF and 2350F, and shall be held at the homogenization temperature a sufficient length of time to minimize harmful heterogeneity by diffusion. from the furnace and permitted to cool through the critical range. recommended for the control of flaking. 2,469,315 a
31、nd 2,677,343, which cover the anchors specified herein. When homogenization The castings shall then be withdrawn Homogenization is 6.5 The Department of the Navy is licensed under U.S. Patents 2,249,546, 2,320,966, 6.6 THE MARGINS OF THIS SPECIFICATION ARE MARKED “#“ TO INDICATE WHERE CHANGES (ADDI-
32、 TIONS, MODIFICATIONS, CORRECTIONS, DELETIONS) FROM THE PREVIOUS ISSUE WERE MADE. THIS WAS DONE AS A CONVENIENCE ONLY AND THE GOVERNMENT ASSUMES NO LIABILITY WHATSOEVER FOR ANY INACCURACIES IN THESE NOTATIONS. BIDDERS AND CONTRACTORS ARE CAUTIONED TO EVALUATE THE REQUIREMENTS OF THIS DOCUMENT BASED ON THE ENTIRE CONTENT IRRESPECTIVE OF THE MARGINAL NOTA- TIONS AND RELATIONSHIP TO THE LAST PREVIOUS ISSUE. Preparing activity: Navy - SH (Project 2 O 40-N126 ) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
