1、._ . 7 MIL-C-50728 13 W 7777706 043L71q 4 * MIL-C-50728(.AR) 26 April 1972 FA-PD-MI-2639 Rev, O i5 February i965 SUPEKSEDING. MILITARY SPECIFICATION CASE, PROJECTILE, BURSTER, M8 1. SCOPE 1.1 This specification covers Case, Projectile, Burster, M8. 2. APPLICABLF: DOCUMENTS 2.1 The following document
2、s of the issue in effect on date of invitation for bids or request for proposals, form a part of this specification to the extent specfied herein. SPECIFICATIONS Federal o-A- 51 0-0-670 O - C - 303 - Acetone, Technical - Chromium Trioxide, Technical (Chromic Acid) - Orthophosphoric (Phosphoric) Acid
3、, Technical Military MIL-A-2550 - Ammunition and Special Weapons, General Specification for STANDARDS Military MIL-STD - i05 MIL-STD - 109 Ma -STD -1167 MIL-STD - i169 MIL -STD -1235 MIL-STD- - Sampling Procedures and Tables for inspection - Quality Assurance Terms and Definitions - Ammunition DaOa
4、Card - - Lot Numbering of Ammunikbon - Packaging, Packing and Marking for Shipment of Inert Ammunition Components - Single and Multilevel Continuous Sampling Procedures by Attributes and Tables for Inspection by Attributes FSC 1315 Provided by IHSNot for ResaleNo reproduction or networking permitted
5、 without license from IHS-,-,-MIL-C- 50728() DRAWIflGS - - - r SI MIL-C-50728 13 W 7777706 0431915 6 W Munitions Command FI05 34899 IEL- i0534899 - Case, Projectile, Burster, M8 - Index of Inspection Equipment List for Case, Projectile, Burster, M8 (Copies of specifications, standards, drawings and
6、publications required 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 document forms a part of this specification to the extent specified herein, Unless ot
7、herwise indicated, the issue in effect on date of invitation for bids or request for proposal shall apply. ASA 46.1 - Surface Texture (Application for copies should be addressed to the American National Standards Institute (ANSI), i430 Broadway, New York, N. Y. 10018,) AS“ Method - American SocieLy
8、of Testing and Materials (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, Pa. 19103) 3.1 General.-Materials, parts and assemblies shall comply with the requirements specified on the applicable drawings, referenced specific
9、ations and the following: 3.1.1 Material.-The supplier shall be responsible for selecting from the classification list contained in the raw material specifications, the surface aiid physical condition of the raw material that will produce burster casings to the dimensions and mechanical properties s
10、pecified as end item requirements. 3.2 Stress relief,-When manufacturing the one piece design or alternative two piece d.esign (casing and sleeve), the burster casing shall be stress relieved following the final. forming operation. Components to be stress relieved must be brought up to a minimum tem
11、perature of 7OO0F and maintained at that temperature for a minimum of 30 minutes. the casing only shall be stress relieved. as specified aEove prior to assembly. For the -ps), .When sectionalized, the braze metal joint shall be free of voids, cracks, entrapped slag, cleaning or other fluid for an ag
12、gregate of 85 percent of the exposed joint section. 3.5 Cleaning prior. to testing.-The burster casing, prior to hydrostatic and air testing shall be free from rust and other foreign matter in order not to clog passages and possibly result in false non-leakers. . 3.6 Pxtective coating. 3.6 3 Prior t
13、o application of the phenolic baking varnish, all surfaces of the burster case shall be throughly cleaned to remove all traces of grit, oil, wax, grease, rust or other foreQgn matter. 3.6.2 Final rinse.-The final rinse used in cleaning the burster case prior to application of the phenolic baking var
14、nish, shall be maintained at a ph of 2,O to 5.0 by the addition of a suffic-ient amount of chromic acid which shall comply with the requirements of 0-0-303 (approximately .o8 ounce per gallon of water) or a mixture of phosphoric acid, which shall comply with the requirement of 0-0-670, and chromic a
15、cid (approximately .O4 ounce of each per gallon of water). a temperature of 140 degrees Fahrenheit to 210 degrees F. This rinse shall ;e maintained at 3.6.3 Coating application. -The phenolic baking varnish shall be applied to the interior surfaces of the burster case within 4 hours after final clea
16、ning operations have been completed. the burster case shall produce an adherent film with no visible pinholes, craters, blisters or uneveness. unless otherwise authorized by the procuring activity. The varnish applied to Varnish shall be applied by a spray method 3.6.4 Cured coating. -After curing t
17、he varnish coating shall be smooth and continuous and. shall not soften or loosen when subjected to the acetone curing test, 3.6 o 5 The acetone shall comply with the requirements of O-A-51. Salt spray. -The cured varnish coating shall withstand exposure to the 5 nist within 1/32 inch of all edges s
18、hall be permi-tted. percent salt spray for 24 hours without evidence of rust. However, 3.7 Workmanship.-The requirements for workmanship are as shown on the applicable drawings, referenced specifications and the following: 3.7.1 Metal defects.-The burster case shall be free from cracks, splits, cold
19、 shuts, incl.usions, porosity, laps, seams or other similar defects. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-50728 13 W 777770b 0431917 T MIL-C-50728( AR) 3.7.2 Burr.-The burster case shall contain no burr which might interfere with a
20、ssembly or function of the item or which might be in$wious to personnel . handling the item. 3.7.3 Foreign matter,-No burster case or assembly shall contain chips, dirt, grease, oil, rust, corrosion or other foreign matter. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. -Unless o
21、therwise specified in the contract or purchase order, the supplier is responsible for the pefformance of all inspection requirements specified herein. in the contract or order, the supplier may use his om or any other facilities suitable for the performance of the inspection requirements specified h
22、erein, unless disapproved. by the Government, perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to the prescribed requirements. Except as otherwise specified The Government reserves the right to 4.1.1 Qua
23、lity assurance terms and definitions.-Reference shall be made to MIL-STD-109 to define quality assurance terms used. 4.1.2 Inspection. -Inspection shall be in accordance with MIL-A-2550, except as specified herein. 4.2 First article sample, 4.2.1 Initial production sample.- At the beginning or regul
24、ar production, a sample shall be submitted in accordance with contract requirements and shall consist of 10 burster cases as follows: 5 - with protective coating 5 - without protective coating In addition to the above 10 burster-cases, when alternative design is used, 5 sets of unassembled, uncoated
25、, component parts shall be submitted. The sample shall be manufactured using the same materials, equipment, processes including packaging and packing, shablbe the same as used for regular production and shall be obtained from the same source of supply. A first article sample or portion thereof as di
26、rected by the procuring agency shall also be sub- mitted whenever there is a lapse in production for a period in excess of 90 days or whenever a change occurs in manufacturing processes, material used, drawing, specifications or source of supply, such as to significantly affect product uniformity as
27、 determined by the responsible technical agency. andiprocedures as will be used in regular production. All parts and materials, 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-C-50728 33 m 9999906 0433738 3 m x5 -I MIL-C-50728( AR) 4.2.1.1 Exa
28、mination and test. -After inspection and provisional acceptance at source, the sample shall be inspected for all requirements of the drawings and specifications at a Government laboratory or such other facility specified in the contract. 4.2.1.2 Initial production sample failure.-Failure of the samp
29、le to comply with requirements of the drawings and specifications shall result in sample disapproval. 4.3 inspection provisions. 4.3.1 Lot. - 4.3.1.1 Submission of product.-The product shall be submitted in accordance with MIL-STD-105, lot numbers shall be in accordance with MIL-STD-1168. 4.3.1.2 fa
30、bricated form bar stock containing not more than one heat of steel. stock lots thus constituted shall be the basis for the selection of samples for the tension test hereinafter prescribed. Bar stock lots.-Components manufactured form bar stock shall be The bar 4.3.2 Exmination. -One hundred percent
31、examination shall be performed for all critical defects. performed on a defect basis in accordance with the classification of defects contained herein, using the sampling plans contained in MIL-STD-105. Continuous sampling plans in accordance with standard MIL-STD-1235 may be used if approved by the
32、 procuring activity. and AQ,L of 0.65 percent for each minor defect shall be used. When performing pressure tests, the items under test will be observed for noncompliance for the entire time it is required to be pressurized. All nonconforming material shall be rejected. shall be used as a basis for
33、surface roughness determination. Four power (4X) magnification may be used in performing visual examination for such defects, a burr and foreign matter. Examination for mazor and minor defects shall be An AQL of 0.40 percent for each ma;ior defect and The roughness comparison speciment prescribed by
34、 ASA-B46,1 4.3.2.1 Sleeve, (alternative design) Drawing Fi0534899 CRITICAL 1. Metal defective Visual 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-50728 13 M 7997706 OLI3L9L7 3 M ” e J+r MIL-C -50728 (AR ) 4.3.2.1 (Contd) Defect MAJOR 101.
35、Diameter of counterbore rear of sleeve 102. Length, total MINOR 201. 202. 203. Surface finish improper 204. Burr 205. Foreign matter Length from front of flange to bottom of Radii or chamfers missing or incorrect counterbore rear of sleeve Method of Inspection Gage Gage Gage Visua (see 6.1) Visual,
36、(see 6.1) Visual Visual 4.3.2.2 Casing (alternative design) Drawing #Fi0534899 CRITICAL 1, Metal defective Visual MAJOR 101. Diameter at forward end of casing (outside) Gage 102. Depth of cavity, min, Gage 103. (for min. indicated length) Gage Thickness of wall at forward end of casing min, MDIOR 20
37、1. 202 e Surface finish improper. 203. Burr 204. Foreign matter Radii or chamfers missing or incorrect 4.3.2,3 Case, Projectile, Burster, M8, (before varnishing) Drawing F1053mg9 CRITICAL 1. Yimeter of press fit surface 2. 3r9sence of reverse taper in press fit surface Visua (see 6) Visua (see 6.1)
38、Visual Visual Gage Gage 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-4.3.2.3 (Cont 6) Defect _.I - - MIL-C-50728 13 7777706 0433720 T a. Method of Inspection CRITICAL ( Cont d) 3. Profile of radius blend wikh press fit surface 4. Surface finish
39、of press fit area improper 5. Metal defective 6, Air stamp missing 7 , 8. Hydrostatic stamp missing ( if applicable) Braze metal not visible for full 360 degrees at juncture of casing and rear of sleeve (if appli cable ) MA JQR 101, 102. 103. front face 104. 105. Thickness of base 106. Thickness of
40、wall Concentricity at rear of burster case with Concentricity of flange with press fit surface Perpendicularity of press fit surface with Length of press fit surface press fit surface MINOR 201. 202 * 203. 204 205 206. 207. 208, 209 210. 211. 212. Gage and Visual Gage and Visual Visual Visual Visual
41、 (see 6.1) (see 6.1) Visual Diameter of flange Diameter of casing (tube) Length from front face to rear af taper, max, Length to-bal, max, Length from front face to bottom of cavity Width of flange Width of undercut, max. (if applicable) Depth of undercut, max. (if applicable) Radii or chamfers, mis
42、sing or incorrect (except Surface finish, improper (except as otherwise Burr Foreign matter as otherwise specified) specified) Gage Gage Gage Gage Gage Gage Gage Gage Gage Gage Gage Gage Gage Gage Visual (see 6.1) Visuai (see 6.1) Visual Visual 7 Provided by IHSNot for ResaleNo reproduction or netwo
43、rking permitted without license from IHS-,-,-4.3.2.4 Case, Burster, M8 Drawing Fi0534899 ( after vaqish) . Defect Method of Inspection .- CRITICAL None defined MAJOR 101. Protective coating, inadequate or damaged Visual 102. Visual Corrosion preventive compound missing from press I. . .- -*_ fit dia
44、meter MINOR . ,-. ._ .- ._. . i .- . I . None defined 4.3.2.5 Carton (prior to sealing) CRITICAL *. I None defined I -. MAJOR None defined . I . . . ,. : MINOR Visual - Visual Visual 201. Improper assemby 202. Incorrect number of cases in carton 203. Separator missing, or damaged 4.3.2.6 Carton (aft
45、er sealing). CRITICAS ._ . i. . . .- i _. .-:. Wone defined -. . MAJOR . .t , .- - . . -* % -iL I a a O MIL-c - 50728 ( AR) 4.4.4 Joint section (alternative design) .-The samples selected in accordance with 4.3.3.4 shall be sectionalized into 2 segments by cutting longitudinally along the assembly a
46、xis. that no damage occurs to the brazed joint section. joints-of sach segment shall be visually exmined to determine compliance with 3.4.1. Care shall be exercised to assure The braze metal of the 4.4.4 Protective coating. 4.4.5.1 Curing test.-An area of at least 1 square inch on the sample burster
47、 case,.*shallbe kept wet with acetone for 2 minutes. The area being tested shalLbe-vigorously rubbed with the thumb and visually inspected for evidence of lifting, blisering, or softening of the varnish coating. 4.4.5.2 Salt spray test .-The procedures for testing the cleaning and application of pro
48、tective coating shall be in accordance with the applicable specifications. Salt spray test shall be performed using equipment and procedures prescribed by ASTM Method B-117. 4.4.6 Inside diameter.-The functional gage shall be entered. into the burster case to the length indicated on the applicable d
49、rawing, 5. PRFPARATION FOR DELmRY 5.1 Packing. 5.1.1 Level C.-Burster cases shall be packed in accordance with MIL-sTD-. 5.2 Marking. -Marking shall be in accordance with n;-STD-1169. 5.3 Data card.-Data card information shall be as specified in MIL-STD-1167. 6. BTOTES 6.1 Visual examination qualification. -When compliance with the applicable requirements is in doubt as a result of visual examination, this characteristic may be measured
