1、13 July 1973 SUPERSEDING MIL-S-13282A 1 May 1964 MILITARY SPECIFICATION SILVER AND SILVER ALLOYS This specification is approved for use by all depart- ments and Agencies of the Department of Defense. 1. SCOPE AND CLASSIFICATION 1.1 Scope. This specification covers fine silver and two silver- copper
2、alloys, 1.2 Classification, Silver shall be furnished in one of the following grades, forms, and tempers, as specified (see 6.2). Grades A - Fine silver. B - Sterling silver. C - Coin silver. Forms Plate Sheet Strip Wire Rod Bar Ingots Cathodes Anodes ! Tempers Annea 1 ed 1/8 Hard 1/4 Hard 1/2 Hard
3、3/4 Hard Hard Spring Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I_ VIL-S-13282B 76 W 7779406 0427572 7 I L 9 “ I. . . y:* i, .F .I I MIL-S- 13282B 2. APPLICABLE DOCUMENTS 2.1 The following documents of the issue in effect on date of invita- tion
4、 for bids or request for proposal, form a part of this specification to the extent specified herein. SPECIFICATIONS FEDERAL PPP-B-576 - Box, Wood, Cleated, Veneer, Paper Overlaid PPP-B-601 - Box, Wood, Cleated-Plywood PPP-B-621 - Boxes, Wood Nailed and Lock-Corner PPP-B-636 - Box, Fiberboard PPP-B-6
5、40 - Boxes, Fiberboard, Corrugated, Triple-Wall MI L ITARY MIL-B-121 - Barrier Material, Greaseproofed, Waterproofed, Flexible MIL-L-1054.7 - Liners, Case, Waterproof STANDAMS FEDERAL Fed. Test Method Std. No. 151 - Metals; Test Methods. MILITARY MIL-STD-105 - Sampling Procedures and Tables for Insp
6、ection by MIL-STD-129 - Marking for Shipment and Storage. Attributes. (Copies of specifications, standards, drawings, and publications re- quired by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.)
7、2.2 Other publications, The following documents form a part of this specification to the extent specified herein. Unless otherwise indicated, the issue in effect on date of invitation for bids or request for proposal shall apply. AMERICAN SOCIETY FOR TESTING AND MATERIALS E 8 - Tension Testing of Me
8、tallic Materials (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, Pa. 19103). .2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-13282B Technical society and technica
9、l association specifications and standards are generally available for reference from libraries. They are also dis- tributed among technical groups and using Federal agencies. 3. REQUIREMENTS 3.1 Preproduction samples. When specified in the contract, five sample units representative of the material
10、to be produced under the contract will be required to determine compliance with the acceptance test requirements of this specification. 3.2 Chemical composition. The material shall conform to the chemical requirements specified in table I. TABLE I. Chemical composition, percent i c Maximum Zinc, Iro
11、n, Cadmium, Lead, other A 99.90 min.1 0.10 maxJ - O .O05 “- O .O25 A Grade Silver Copper maximum maximum maximum maximum impurities B t1.0 +0.4 +1,0 +0.4 9205 -0.4 7.5 -1.0 0.06 O5 0.05 .O3 O .O6 C -0.4 lobo -1.0 .O6 .O5 O5 .O3 . O6 ! I I ! For anodss, the silver content shall be 99.95 percent minim
12、um and silver plus copper shall be 99.98 percent minimum. For all other forms, silver plus copper shall be 99.95 percent minimum. d Bismuth - 0.001 percent maximum. For electroplating (anodes), tellurium and selenium shall each be 0.001 maximum. 3.2.1 When specified in the contract or order, a chemi
13、cal analysis report, showing the percentage of each element, shall be furnished by the contractor. 3.3 Mechanical properties, 3.3.1 Tensile requirements for sheet and strip, Silver and silver alloy sheet and strip shall be capable of meeting the requirements of table II. 3 Provided by IHSNot for Res
14、aleNo reproduction or networking permitted without license from IHS-,-,-MIL-S- 13282B .- TABLE II. Tensile strength requirements, sheet and strip Tensile strength, psi Elongation, Reduction in Percent percent in Temper Brown & Sharpe Nos. reduction Minimum I Maximum 2 in., minimum Grade A Annealed O
15、 “_ 24,000 1 30,000 1 25 1/2 hard 2 Hard 4 Spring 8 “- 30,000 37,000 i 8 “_ 37,000 i 44,000 1 3 “_ 44,000 1 .51,000 1 Grade B Annealed O “_ 35,000 45,000 1 20 1/2 hard 2 21 46,000 55 9 O00 4 Hard 4 37 54,000 62,000 2 Spring 8 60 63,000 70,000 1 Annealed O “_ 36,000 47,000 20 1/2 hard 2 21 47,000 57,
16、000 4 314 hard 3 29 53,000 63,000 2 Hard 4 37 58,000 68,000 1 Spring 8 60 67,000 75,000 1 3.3.2 Tensile requirements for wire and rod, Silver and silver al.loy wire and rod shall be capable of meeting the requirements of table III. 4 Provided by IHSNot for ResaleNo reproduction or networking permitt
17、ed without license from IHS-,-,-I . #. r 1 I ! I i MIL-S- 13282B TABLE III. Tensile strength requirements, wire and rod Tensile strength, psi Elongation, percent Reduction in Percent in 2 in, or 4X Temper Brom & Sharpe Nos. reduction Minimum Maximum Diam., minimum Grade A Annealed O “- 24 y O00 30,0
18、00 25 114 hard 1 21 30,000 37,000 4 Hard 4 60 42,000 49,000 2 Spring 8 84 46,000 54,000 1 Grade B Annealed O “_ 35,000 45,000 20 114 hard 1 21 47,000 55,000 4 Hard 4 60 63,000 71,000 2 Spring 8 84 I 72,000 I 82,000 1 Grade C Annealed O “a. 36,000 47 y O00 20 118 hard 112 11 42,000 52,000 8 114 hard
19、1 21 47,000 57,000 4 314 hard 3 50 61,000 71,000 3 Hard 4 60 65,000 74,000 2 Spring 8 84 74,000 82,000 1 3.3.3 Tensile requirements for other forms. The tensile properties of other forms, when required, shall be as specified in the contract or order, (see 6.2). 5 Provided by IHSNot for ResaleNo repr
20、oduction or networking permitted without license from IHS-,-,-. MIL-S-13282B 3.3.4 Bend requirements for sheet and strip. Sheet and strip, all grades, having a temper of 1/2 hard or less, shall be capable of being bent through 1800 around a radius equal to the thickness of the sheet or strip without
21、 any signs of flaking or fracture. 3.3.5 Twist requirements for wire and rod. Wire and rod, grades B and C having a temper of 1/4 hard or less shall be capable of being twisted through 7 forward and 7 reverse 3600 turns within a length of 3 inches without exhibiting seams, slivers, or other disconti
22、nuities that would be detrimental. 3.4 Microstructure. The microconstituents of grades B and C shall be uniformly distributed so that segregations are not present in the material 3.5 Dimensions. The width, length, thickness and diameter of the . material, 88 applicable, shall be as specified in the
23、individual contract. 3.5.1 Dimensional tolerances (a) Sheet and strip. Thickness, width, and straightness tolerances for sheet and strip shall conform to the requirements of tables IV, V, and VI, respectively. Thickness and width tolerances shall be plus and minus. TABLE IV. Thickness tolerances, sh
24、eet and strip T r Thickness, inch Up to 0.004, incl. Over 0.004 to 0.006, incl. Over .O06 to .009, incl. Over ,009 to ,013, incl. Over ,013 to ,017, incl. Over ,017 to ,021, inl. Over ,021 to ,026, incl. Over .O26 to .037, incl. Over ,037 to ,050, incl. Over ,050 to ,073, incl. Over ,073 to ,130, in
25、cl. Over ,130 to ,187, inel. U “ Ip to 9 in. wide, incl. O, 0003 ,0004 .O006 ,0008 ,0010 . ,0012 .O015 ,0020 .o020 ,0025 ,0025 . .O030 Over ,187 to ,205, incl. i e 0030 lover .205 to .300, incl. y , .O030 Tolerance, +inch Over 9 to 14 in. wide, incl. o. O005 ,0006 .O008 ,0010 ,0014 ,0016 I0020 O020
26、,0020 ,0025 ,0025 ,0030 ,0030 ,0030 Over 14 to 20 in. wide, incl. “ -“- 0.0012 ,0015 .O018 0020 ,0025 .O025 ,0025 ,0030 ,0030 ,0030 e 0035 O035 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-! MIL-S-13282B TABLE V. Width tolerances, sheet and stri
27、p Tolerance, finch Slit metal Sawed metal Over 0.062 to Square Width, in. thick in. thick, metal in. thick incl, thick, incl. inches Over 0.5 Up to 0.5 sheared Over 0.125 0.125 in, thick, Up to 0.062 in. Jp to 2, incl. 062 .O31 ,062 .O15 ,015 005 incl. her 6 to 20, .O62 ,031 .O62 ,015 ,015 ,003 inc
28、1. her 2 to 6, O 062 0.031 0.062 0.015 O. 008 O ,003 TABLE VI. Straightness tolerances, sheet and strip (Maximum edgewise curvature in 6 feet.) Width, inches Ip to 2, incl wer 2 to 6, incl. Wer 6 to 13, inc l. Tolerance, inch Slit metal . Square sheared metal Over 0.125 to 0.250 Flat and in. thick,
29、Up to 0,125 in. Coiled 0.031 O O25 O. 250 0.500 0.500 incl. thick, incl. straightened Flat ,500 .O62 ,031 “_ ,500 ,500 ,031 .O25 “_ 500 (b) Wire and.rod. Diameter tolerances for wire and rod shall conform to the requirements of table VII. All tolerances shall be plue and minus. Sawed metal 0.031 .O3
30、1 050 7 ! Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-13282B TABLE VII. Diameter tolerances, wire and rod Diameter, inch 0.012 to 0.030, incl, Over ,030 to .060,incl. Over ,060 to .1871incl, Over .187 to .2S0,incle Over ,250 to ,375,incl. O
31、ver .375 to .750, incl. Tolerance, +inch o. 0002 .O003 O005 , O010 .o015 .o020 (c) Bar, plate, ingots, cathodes and anodes. The dimensional tolerances of bar, plate, ingots, cathodes and anodes as required, shall be as specified in the contract or order, (see 6.2). 3.6 Identification marking. Silver
32、 and silver alloys shall be legibly identified with the manufacturers name, brand or trademark and the grade, temper, and specification number, Identification shall be such as not to adversely affect use of the material, 3.7 Workmanship, Silver and silver alloys furnished under this speci- fication
33、shall be free of dull surfaces, die marks and seams. 4, QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the supplier is responsible for the performance of all inspection requirements as specified herein. Except as otherwis
34、e specified 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 t3 perform any of the inspections set forth in the specific
35、ation where such inspections are deemed necessary to assure supplies and services conform to prescribed requiraments, I a Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S- 13282B ! (a) Preproduction inspection, (b) Acceptance inspection of indiv
36、idual lots. 4.2.1 Preproduction inspection. Preproduction inspection, when required (see 3.1) shall consist of the following: Chemical analysis (see 3,2 and 4.6.1) Tensile properties (see 3.3.1, 3.3.2, 3.3.3 and 4.6.21 Bend tests (see 3.3.4 and 4,6,3) Twist tests (see 3.3.5 and 4.6.4) Microscopic ex
37、amination (see 3.4 and 4.7) Dimensions (see 3.5 and 4.5) Identification marking (see 3.6 and 4-.5) Workmanship (see 3 7 and 4.5) 4.2.2 Lot acceptance inspection. Lot acceptance inspection shall con- sist of the inspection covered by 4.2.1 plus preparation for shipment (see section 5 and 4.5,2). 4.3
38、x, A lot shall consist of all silver material of the same grade, temper, form, and size in one shipment. 4.4 Sampling. 4.4.1 For preproduction testing. When specified in the contract or order, a representative sample of five units will be required to deter- mine compliance with the requirements of t
39、he contract and specification. Preproduction tests will be accomplished at an activity designated by the procuring activity. 4 4.2 For acceptance testing. (a) Sampling for chemical analysis. One sample shall be taken from each lot of silver material. Unless otherwise specified in the contract or ord
40、er, the sample shall consist of approxi- mately 10 grams of chips. (b) Sampling for tension tests, Two tension test samples shall be taken from each lot, (c) Sampling for bend and twist tests. Five samples each for the bend and twist tests shall be taken from each lot. 9 Provided by IHSNot for Resal
41、eNo reproduction or networking permitted without license from IHS-,-,-MIL-S-13282B (e) Sampling for examination. Unless otherwise specified in the contract or order, sampling for dimensional and workmanship examination shall be done in accordance with MIL-STD-105, Inspection Level II, AQL 1.0 percen
42、t, Samples for dimensional and workmanship examination shall be evaluated separately, 4-.5 Examination, Each sample unit selected in accordance with 4.4.2(e) shall be visually and dimensionally examined to determine compliance with the requirements for dimensions (see 3.51, identification marking (s
43、ee 3.61, and workmanship (see 3.7). Straightness of each sample nit shall be determined as specified in 4.5.1. 4.5.1 Straightness. Straightness shall be determined by placing the piece on a level surface so that the arc or departure from straightness is horizontal, The maximum depth of arc shall be
44、measured to the nearest 1/32 inch by means of a straightedge and a steel scale. 4.5.2 Preparation for shiprng1 Exwination of the packing and marking for shipment shall be made for conformance to the requirements of section 5. 4.6 Tests, 4.6.1 Chical an_aly.sis. The samples selected in accordance wit
45、h 4,4.2(a) shall be analyzed by the wet chemical method in accordance with method 111 of Fed. Test Method Std. No. 151 or the spectrochemical method in accordance with method 112 of Fed. Test Method Std. No. 151 to determine conformance to 3.2, In case of dispute, the analysis by method 111 shall be
46、 the basis for acceptance or rejection. 4.6.2 Tension tests. All. tension tests shall be conducted in accordance with ASTM E 8, 4.6.3 Bend test. Samples selected in accordance with 4.4.2(c) shall be bent 1800 around a radius equal to the thickness of the sheet or strip. Bends shall be mads 90 to the
47、 direction of rolling. The material shall be examined for conformance to 3.3.4, 10 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S- 13282B 4,6.4 Twist test. Samples of grades B or C silver alloy having a , temper of 1/4 hard or less, selected i
48、n accordance with 44-,2(c), shall be subjected to 7 forward and 7 reverse 360 turns within a length of 3 inches. The material shall be examined for conformance to 3.3.5. 4.7 Microscopic examination, Samples selected in accordance with 4.4,2(d) sna11 be exmined at a suitable magnification to determin
49、e compliance with 3.4, 4.8 Rejection. 4.8.1 Examination defects. Any sample unit having one or more defects shall be rejected. If the number of nonconforming sample units in the sample exceeds the acceptance number specified in MIL-STD-105 for that sample size, the entire lot shall be rejected, subject to the resubmittal paragraph of MIL-ST
