1、MIL-B-20qb7A 73 7977706 0423277 LI E MILITARY SPECIFICATION BOXBOARD (FOR USE IN AMMUNITION) MIL-B-20467A(PA) i4 February 197 SUPERSEDING -. MIL-B-20467 27 November i951 f 1, SCOPE 1.1 This specification covers one grade of Boxboard for use in ammunition. * 2. APPLICABLE DOCUMENTS 2.1 The following
2、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. SPECIFICATIONS MILITARY MIL-A-2550 - Ammunition, General Specifications for STANDARDS MILITARY MIL-STD-105 - Sampling Procedures and Tables - f
3、or Inspection by Attributes (ABC-STD-105) MIL-STD-109 - Quality Assurance Terms and Definitions MIL-STD-129 - Marking for Shipment and Storage MIL-STD-1235- Single and Multilevel Continuous Sampling Procedures and Tables for Inspection by Attributes (Copies of specifications and standards required b
4、y contractors in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- x_I_ MIL-B-20467A 93 M 9999906 0423278 b M! MI
5、L-B-20467A (PA) 2.2 Other publications. The following documents form a part of this specification to the extent specified herein. Unless otherwise specified, the issue in effect on date of invitation for bids shall apply. AMERICAN SOCIETY FOR TESTING AND MATERIALS PUBLICATIONS D548-71 - Water Solubl
6、e Acidity or Alkalinity of Paper D641-65 - Conditioning Paperboard, Fiberboard and Paperboard Containers for Testing D644-70 - Moisture Content of Paper and Paperboard by Oven Drying D645-67 - Thickness of Paper and Paperboard D646-67 - Basis Weight of Paper and Paperboard 828-71 - Tensile Breaking
7、Strength of Paper and Paperboard D2529-68- Bursting Strength of Paperboard and Linerboard (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, Pennsylvania, 19103). 8 3 . REQUIREMENTS 3.1 Material. The boxboard shall consist o
8、f chipboard, newsboard, reclaimed kraft board, or waste paper board, with a 100 percent sulphate kraft liner on one side. 3.2 Color. The boxboard shall be essentially gray to tan, but may have variations in hue and shade and may contain specks, as might be caused by fabricating from mixed waste pape
9、rs. 3.3 Finish. The boxboard finish shall be calender No. 3 to No. 4 similar to a standard sample furnished or approved by the contracting officer. 3.4 Form and dimension. The boxboard shall be furnished in flat cut sheets. The sheets shall be of the thickness, length and width specified below: (a)
10、Thickness - Total 0.018 to 0.021 inch (see 4.4.1) Liner, 0.007 to 0.008 inch. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-B-204b7A 73 779970b 0423279 m MIL-B-20467A (PA) (b) Sheet Size- The sheets shall measure 24 inches by 36 inches, the t
11、olerance being plus or minus (11) 1/16 inches, unless otherwise specified in the contract. The longer dimension shall be in the machine direction (see 6.5). 3.5 Basis weight. The minimum weight for 500 sheets, measuring 24 X 36 inches shall be i96 pounds (lbs.) (see 4.4.1) 3.6 Edge. One edge of each
12、 sheet in the machine direction shall be deckle-edged (see 6.6). 3.7 Tensile strength. The tensile strength of the boxboard shall meet the following requirements when tested as specified in paragraph 4.4.1: (a) Machine direction - minimum (min.) 70 lbs. (b) Cross section - minimum 16 lbs. 3.8 Tensil
13、e strength after forming. The loss in tensile 3.9 Bursting strength. The boxboard shall be capable of strength after forming shall not exceed 5 percent (%) (see 4.4.2). meeting the minimum bursting strength of 100 points when tested as specified herein (see 4.4.1). 3.10 Moisture content. The moistur
14、e content of the boxboard shall be between the limits of 4 percent and 7 percent, when tested as specified in paragraph 4.4.1. 3.11 Acidity or alkalinity. The boxboard shall have a pH between 6.0 and 7.5, when tested in accordance with paragraph 4.4.1. 3.12 Workmanship. The boxboard shall be free fr
15、om pieces of unmacerated paper larger than U4 square inch in area, wax, asphalt, metallic or abrasive materials, slime, blisters, holes, tears, scuffs, wrinkles and delamination. Trimmed edges shall be clean cut. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license
16、from IHS-,-,-I MIL-B-20Llb7A 73 W 99991Cb 0423280 4 W MIL-B-20467A (PA) it 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 here
17、in. Except as otherwise 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 to perform any of the inspections set
18、 forth in the specification where such inspec- tions are deemed necessary to assure supplies and services conform to prescribed requirements, Reference shall be made to Standard MIL-STD-109 in order to define terms used herein. The provisions of Specification MIL-A-2550 shall apply. 4.1.1 Submission
19、 of product. items deliverable under the contract is submitted to the Government for acceptance, the contractor shall supply the following information accompanied by a certificate which attests that the information provided is correct and applicable to the product being submitted: a. A statement tha
20、t the lot complies with all of the quality assurance provisions specified within this specification. b. Specification number and date, together with an identification and date of changes thereto. C. C. A statement that all material purchased by the contractor meets requirements, when such material i
21、s controlled by Government or commercial specifications referenced in any of the contractual documents, and that certificates of conformance are on file and available for review. At the time the completed lot of d. Number of items in the lot. e. Date submitted. The certificate shall be signed by a r
22、esponsible agent of the certifying organization. The initial certificate submitted shall be substantiated by evidence of the agents authority to bind his principal. Substantiation of the agents authority will not be required with subsequent certificates, unless, during the course of the contract, th
23、is authority is vested in another agent of the certifying organization. 4.2 Inspection provisions 4.2.1 Lot formation. The term “inspection l.otfl, as used in this specification, is defined as an essentially homogeneous 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without l
24、icense from IHS-,-,-MIL-B-204b7A 93 779930b 0423I283 b W MIL-B-20 467A (PA) collection of unSts of product from which a represenf-ative sample is drawn and inspected to determine conformance with a-elicable requirements. The sample selected shall represent only that quantity of units from which the
25、sample was drawn and shall not be construed to represent any prior or subsequent quantities presented for inspection. Homogeneity shall be considered to exist provided the inspection lot has been produced by one manufacturer, in one unchanged process, in accordance with the same specification and sa
26、me specification revision, and complies with the provisions for submission of product as specified in MIL-STD-105. Changes to the process or specification not affecting safety, performance, interchangeability, or storage, as determined by the Government, shall not be deemed to alter the homogeneity
27、criteria specified herein, regardless of the type of sampling procedure which is being applied to determine conformance with requirements. one nominal thickness (not to exceed 20,000 pounds). which has been manufactured from the same types and proportions of ingredients by the same process, by one m
28、anufacturer, and submitted for acceptance at one time. 4.2.3 Examination. The examinations listed in the following subparagraphs shall be performed on inspection lots (see 4.2.2) of boxboard. Inspection for .critical defects (and major defects, when so specified) shall be 100 percent. Sampling plans
29、 for major and minor defects shall be in accordance with MIL-STD-105; except that continuous sampling plans in accordance with MIL-STD-1235 may be used if approved by the Government. Instead of applying the AQLs designated herein to the groups of major and minor defects listed, the contractor may el
30、ect to apply AQLs to individual defects using an AQL of 0.40.percent for each major defect and an AQL of 0.65 percent for each minor defect. When this method is elected, it shall be applied to all of the major and minor defects listed in the applicable subparagraph of this section, except where 100
31、percent inspection is specified, and be documented as part of the contractors inspection system. Equipment necessary for the performance of the inspections listed shall be in accordance with 4.3.10. 4.2.2 Lot size, A lot shall consist of all the boxboard of 4.3 Testing 4.3.1 Sampling. The sampling p
32、lans for each of the following tests shall be in accordance with Standard MIL-STD-105, Table IIA, using Code Letter D and an AQL of 0.40 for Major defects and an k- a Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-B-20467A (PA) i AQL of 0.65 for
33、 each Minor defect: CLASSIFICATION OF DEFECTS Category Defects Color (see 3.2) Minor Finish (see 3.3) Minor Edge (see 3.6) Minor Workmans hip (see 3.12) Minor Method of Code No, Inspection (see 6.3) Visual O1001 Visual 01002 Visual O1003 Visual 01004 4.3.2 Form and dimension (see 3.41, Minor defect,
34、 Code No. 02001. Samples to be tested shall be obtained in accordance with the provisions of ASTM D645-67. Failure of the sample to meet the applicable requirement when tested as specified in 4.4.1 shall be cause for rejection of the lot (see 4.3.9). 4.3.3 Basis weight (see 3.51, Major defect, Code
35、No. 03001. Samples to be tested shall be selected as specified in ASTM D-646-67, Failure of the sample to meet the applicable requirement when tested as specified In 4.4.1 shall reject the lot (see 4.3.9). 4.3.4 Tensile strength (see 3.7), Major defect, Code No. 04001. Test specimens shall be select
36、ed in accordance with the provisions of ASTM-D-828-71. Failure to meet the applicable requirement when tested as sDecified in 4.4.1 shall be cause for rejection of the lot (see 4.3.9). Code No. O5OOl. Five samples measuring 12 inches long in the machine 4.3.5 Tensile strength. after forming (see 3.8
37、), Major defect, direction and 6 inches wide shall be selected for this test. Failure of the sample to meet the applicable requirement shall be cause for rejection (see 4.3.9). 4.3.6 Bursting strength (see 3.91, Major defect, Code No. 06001. Samples shall be selected in accordance with the provision
38、s of ASTM-D2529-68. Failure to meet the applicable requirement when tested as Specified in 4.4.1 shall be cause for rejection of the lot (see 4.3.9). 4.3.7 Moisture content (see 3.101, Major defect, Code No. 07001. Samples shall be selected as specified in ASTM-D644-70. 6 Provided by IHSNot for Resa
39、leNo reproduction or networking permitted without license from IHS-,-,-MIL-B-2Llb7A 73 799990b 0423283 T MIL-B-204 67A (PA ) Failure of the values of the specimens to meet the applicable requirement shall be cause for rejection (see 4.3.9). No. 08001. Samples shall be selected as specified in ASTM-D
40、548-71. Failure of the sample to meet the applicable requirement shall be cause for rejection of the lot (see 4.3.9). 4.3.8 Acidity or alkalinity (see 3.111, Major defect, Code 4.3.9 Conditioning. Unless otherwise specified, all specimens shall be brought to a substantial equilibrium in a circulatin
41、g atmosphere maintained at a relative humidity and a temperature specified in ASTN-I 641-65. 4.3.10 Inspection equipment. Inspection equipment required to perform the inspection prescribed in this specification is identified in the Examination (4.2.3) and Test Method (4.4) para- graphs herein. See 6
42、.4 for details concerning responsibilities for inspection equipment design and approval. 4.4 Test methods and procedures 4.4.1 Performance of tests. The following tests shall be performed in accordance with the pertinent document and method specified: Test Do c umen t Met hod Form and dimensions AST
43、M Basis Weight ASTM Tensile strength ASTM Bursting strength ASTM Moisture content ASTM Acidity or Alkalinity ASTM D645-67 D646-67 D828-71 D2529-68 D644-70 Dj48-71 4.4.2 Tensile strength after forming. Wrap a sample of the material, 12 inches long in the machine direction and 6 inches wide around a m
44、andrel 1 1/4 plus or minus (+) 1/8 inch in diameter so that the machine direction is parallel t the axis of the mandrel and the smoother surface of the board is on the outside. Avoid any creasing or folding while winding. Remove the samples by unwinding and test for tensile strength in cross directi
45、on. Calculate the percent loss in tensile strength caused by this operation : Percent loss in tensile strength = (A-B) x 100 A 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-B-iO4b7A 73 W 7797706 O423284 L Where : A = tensile strength before f
46、orliling (4.3.4) B = tensile strength cross direction after foyrning 5. PREPARATIOJ FOR DZLITTEXY 5.1 Packing and Ilarking 5.1.1 Packing.-Unless otherwise specifie(1, packing shall tie Level C. 3oxboard shall be packed in a rmmcr to insure carrier acceptance and safe delivery af; destination at the
47、lowest transportation rate for such supplies. Containers snall be in accordance with rules or regulations of carriers applicable to mode of transportation. 5.2 Marking for shipment. Interior packages und exterior shipping containers shall be marked in accordance with Standard MIL-STD-129. The nomenc
48、lature s:iall be as follows : S.1.1.1 Level C. BO 33 O AR il COTJOR TKCDTII TAC ; ! (7 II SPECIFICATION MIL-3-20467A (PA) 6.1 Intended use. The boxboard covered by this specification Is designed for use in the manLifacture of tubcs, cases, discs, closing plugs, etc., for Signals, Flares, j:lectrlc p
49、ririers, Cartridges and other conponents of various end itoris. following : 6.2 Ordering gata. Prociircrwnt docurients shall specify the a. Title, number and date of this specification b, Size of sheets (if other than 24 inches by 36 inches) c, Machine direction with relation to sheet ciiriensfons 6.3 Inspection Code Umbers. The f9ve digit code numbers assigned to the inspection herein are to facilitate future data collection and a
