1、MIL-M-l7999C(MR) 1 December 1972 SUPERSEDING MIL-M- 17999B(MR) 1 October 1965 MILITARY SPECIFICATION METAL, EXPANDED, ALUMINUM l. SCOPE 1.1 Scope. This specification covers aluminum expanded metal. 1.2 Classification, Expanded metal shall be of the following classes and alloys, as specified (see 6.2
2、): Class 1 - As expanded Class. 2 - Expanded and flattened Alloy 3003 Alloy 5005 Alloy 5052 Alloy 6061 2, APPLICABLE DOCUMENTS I 2.1 The following documents of the issue in effect on date of invitation for bids or request for proposal, form a part of this specification to the extent specified herein
3、. SPECIFICATIONS FEDERAL QQ-A-250 - Aluminum Alloy Plate and Sheet; General Specification for QQ-A-250/2 - Aluminum Alloy 3003, Plate and Sheet QQ-8-25010 - Aluminum Alloy 5052, Plate and Sheet QQ-A-250111 - Aluminum Alloy 6061, Plate and Sheet UU-P-271 - Paper, Wrapping, Waterproofed Kraft STANDARD
4、S MILITARY MIL-STD-105 - Sampling Procedures and Tables for Inspection by Attributes MIL-STD-129 - Marking for Shipment and Storage r M Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-(Copies of specifications, standards, drawings, and publications r
5、equired by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer ) 2.2 Other publications. The following documents form a part of this specification to the extent specified herein. Unless otherwise indicat
6、ed, the issue in effect on date of invitation for bids or request for proposal shall apply. AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) STANDARDS B 209 - Aluminum Alloy Sheet and Plate (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Stre
7、et, Philadelphia, Pennsylvania 19103.) 3. REQUIREMENTS 3.1 Materials. Unless otherwise specified in the contract or order, expanded metal and flattened expanded metal shall be produced from aluminum alloy 3003-Hl4 sheet conforming to QQ-A-250/2 or 5005-H34 sheet conforming to ASTM B 209 at the suppl
8、iers option. When specified (see 6.2) in the contract or order, expanded metal and flattened expanded metal shall be produced from aluminum alloy 5052-Oor5052-H32sheetconformingtoQQ-A-250/8; or 6061T6 sheet conforming to QQ-A-250/11, as specified. 3.2 Manufacture, Expanded metal shall be manufacture
9、d from sheet aluminum in thicknesses corresponding to table I, as specified (see 6.2). Unless otherwise specified in the contract or order, the aluminum shall be sheared so that each sheet will be expanded into uniform diamond-shaped openings, the longer diagonals of which shall be parallel to the l
10、ength direction of the sheet, Each opening shall be integral with adjoining openings by means of unsheared bonds (bridges) of the original sheet. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-17777C 75 m 7977706 0117200 b m MIL-M-l7999C(MR) T
11、able I. Mesh sizes, thickness of sheet, and weight of class 2 expanded metal before flattening r Commercial style number 112 - NO. .O51 112 - NO. .O81 314 - NO. .O51 314 - NO. .081Lt 314 - NO. .O81Hy 314 - NO. .125 1-112 - NO. .O81 1-112 - NO. .125 Size of II Nominal width of opening 112 11 2 314 31
12、4 314 314 1-112 1-112 sh, inches Dimensions, center to center br iound three girthwise and two lengthwise. The strap- ping in the direction of the skids shall be placed over the skids and securely stapled to the skids with corrosion resisting staples. The strapping shall be 1-1/4 by 0.035-inch flat
13、band or 8 gage high tensile wire. The gross weight of the secured Lift shall not exceed 3000 pounds. 5.1.2 Level C. Expanded metal sheets shall be packaged and packed for shipment in compliance with common carrier regulations applicable to that mode of transportation to ensure safe delivery at desti
14、nation at lowest transportation cost without assessment of penalty charges for improper pack- ing. 5.2 Marking. In addition to any special marking required in the contract or order, marking of shipping containers shall be in accordance with MIL-STD- 129. 6. NOTES 6.1 Intended use. Expanded metal cov
15、ered by this specification is intended for machinery guards, ventilating screens, and other general uses. 6.2 Ordering data. Purchasers should exercise any desired options offered herein and procurement documents should specify the following: a. Title, number, and date of this specification, b. Clas
16、s, alloy and temper required (see 1.2 and 3.1). C. When other than uniform diamond-shaped openings are required. d. Comercial style number. e. when special size sheets are required. f. Level of packaging and packing required (see 5.1) g. Special marking, when required (see 5.2) Custodian: Army - MR Review activities: Army - MR DSA - IS Preparing activity: Amy - MR Project No. 9535-AO03 User activities: Army - ME, AT 5 * U. S. GOVERNMENT PRINTING OFFICE: 1972 -714-540/2880 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
