1、MIL-P-50357 13. W 7777906 032665q 5 - 5- 37- o? MIL-P-50357(m) 30 September 1969 MILITARY SpEcIFICAmoN PROJECTLLE, Gom, H.Es, M49A3 METAL PARTS ASSEMT3LY (AT-LOY STEEL) 1. SCOPE 1.1 This specification covers Projectile, OMM, H.E., M49A3 Metal Parts Assembly (Alloy Steel). 2. APPLICABLE DOCUMEWCS 2.1
2、 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: SPECIFICATIONS Military MLL-A-25 50 MILI-6868 - Ammunition and Special Weapons, General - Inspection, Processes Magnetic Particle
3、Specification for STANDARDS Federal Federal Test Method Standard No. 141 - Paint, Varnish, Lacquer, and Federal Test Method Standard No. 151 - Metals, Test Methods Related Materials ; Methods of Inspection Sampling and Testing FSC 1310 THIS DOCUMENT CONTAINS 15 .- PAGES. - - Provided by IHSNot for R
4、esaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-50357 13 7779706 0326655 7 MIL-p-50357 (MU) 2.1 (Contd) Military MIL-STD-105 MIL-STD-109 KtL-STD-410 MIL-sm- i235 DRAWINGS Munitions CoIrunand Di05 51926 IEL- 10551926 FULICATIONS PA-PD-792 Sampling Procedures and Tables
5、 for Inspection Quality Assurance Terms and Definitions Qualification of Inspection Personnel (Magnetic Ammunition Data Card Packaging, Packing and Marking for Shipment Single and Multileve1,Continuous Sampling by Attributes Particle and Penetrant) of Inert Ammunition Components Procedure and Tables
6、 for Inspection by Attributes Projectile, 60m, H.E., M49A3 Metal Parts Assembly (Alloy Steel) - Inspection Equibent List for Projectile , 60m, M49A3 Metal Parts Assembly (Alqy Steel) - Equipuent, Testing or Measuring for Ammunition Items (Copies of specifications, standards drawings and piblications
7、 required by supplier 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 indica
8、ted, the issue in effect on date of invitation for bids or request for proposal shall apply. ASA-STD-lOg to define quality assurance terms used. 4 I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-50357(MJ) 4.1.2 Inspection.-Inspection shall be
9、 in accordance with MIL-A-2550, except as specified herein, 4.1.3 Inspection criteria, a. Successful passage of all inspections required by the drawings and specifications shall be considered as a condition precedent to performing the Proving Ground functional tests (see 3.6). b. Acceptance or rejec
10、tion of a lot by the Government shall be contingent on successful passage of the Proving Ground fhnctional tests. 4.2 First article sample. 4.2.1 Initial production sample.-At the beginning a sample shall be submitted in accordance with contract shall-consist of 60 metal parts assemblies as follows:
11、 of regular production, requirements and 55 projectile assemblies complete, painted 5 projectile assemblies complete, unpainted Fifiy of the above-painted projectile assemblies shall be forwarded to a designated proving ground for ballistic testing. factured using the same materials, equipment, proc
12、esses and procedures as used in regular production. All parts and materials, including packaging and packing, shall be the same as used for the regular production and shall be obtained from the same source of supply. thereof as directed by the procuring agency shall also be submitted whenever there
13、is a lapse in production for a period in excess of 90 days or whenever a change occurs in manufacture processes, material used, drawing, specifications or source of supply, such as to significally affect product uniformity as determined by the responsible technical agency. The sample shall be manu-
14、A first article sample or portion 4.2.1.1 Examination and test.-After inspection and provisional acceptwce at source, the sample shall be inspected for all requirements of the dradngs and specifications at a Government laboratory or such other facility specified in the contract. 4.2.1.2 Initial prod
15、uction sample failure.-Failure of the sample to . comply with requirements of the drawings and specifications shall result 4.3 inspection. 4.3.1.1 Submission of product.-The product shall be submitted in accordance with Mu;-STD-105 or MIL-STD-1235, as applicable. 5 Provided by IHSNot for ResaleNo re
16、production or networking permitted without license from IHS-,-,-MIL-P-50357 13 m 3999706 032bb59 4 - W MIEF- 50357 (MU) 4.3.1.2 Stress relieve lot .-Stress relieved lots shall contain cold worked bodies fran not more than one heat of steel that have been cold worked by the same process utilizing the
17、 Bame tooling mC ecgpuent and stress relieved in the 6ame furnace at the same temperature for the same length of time. cold shaping lot thus constituted shall be the basis for the selection of samples for the tension test hereinafter prescribed. The 4.3.1.3 Miscellaneous lots.-Small lots, such as bo
18、dies from abnormally SmaU heats of steel or bodies which have become separated from previously delivered lots, etc, may at the discretion of the manufacturer, be grouped into miscellaneous stress relieved lots, Such lots shaL1be identified by a xn3,scellaneouB lot code number. 4.3.1.4 Projectile lot
19、,-All stress relieved lots that have been determined to have complied -with the mechanical properties requirements of the applicable component drawing, may be grouped for assembly into projectile lots. A projectile ot shall consist of projectile assemblies produced by one manufacturer mder one contr
20、act, in one unchanged process in accordance with the same drawing, , measurements of the tool may be substituted provided the contractor has established correlation between the tool dimensions and tihe component dimensions prior to the start of production, The contractor shall be responsible for mai
21、ntaining adequate surveillance to assure that drawing requirements are being met throughout the life of the tool. All material produced prior to periodic inspection will be rejected and screened whenever a defective tool control dimension is found. 6 Provided by IHSNot for ResaleNo reproduction or n
22、etworking permitted without license from IHS-,-,-MIL-P-50357 13 777770b 03Zbbb0 O M 4.3.2.2 Metal parts, Drawing Di0551926 (before paint). - Defect Method of Inspection CRImCAL 1. Metal defective visual (Probe light 1 MAJOR 101. 102 . 103 104. 105 106. i08 . 109 110 . u. 112. u4. u5 u6 . u7 . 11.8 J
23、J-9 KCNOR 107 . u3 201, 202. 293 204. 205 o 206. 207 208. 209. Weight Concentricity of large threads with bourrelet, Concentricity of taper at nose with bourrelet Concentricity of taper at rear with bourrelet Concentricity of small threads with bourrelet, Diameter of bourrelet, min. Diameter of body
24、, min. Depth from front face to base of large cavity Depth from rear face to base of small cavity, mx. Depth of bourrelet grooves Length from front face to first outside basic diameter Length fran front face to second outside basic diameter Length from front face to third outside basic diameter Leng
25、th from front face to fourth outside basic diameter Length from rear face to rear outside basic diameter Length fran front face to rear of bourrelet Width of small thread undercut, max. Variation in wall thickness Foreign matter in cavity including perpendicularity of front face including perpendicu
26、larity of rear face Dimeter of small thread cavity undercut Depth of large thread cavity, max. Length from base of cavity to forward inside basic diameter (before or aft;er nosing) Length from base of cavity to rear inside basic diameter (before or after nosing) Length, total Radii or chamfers missi
27、ng or incorrect Surface finish improper Burr Foreign matter (except as otherwise classified) Approved, Scale Gage Gage Gage Gage Gage Gage Gage Gage Gage Gage Gage Gage Gage Gage Gage Gage Gage Visual Gage Gage Gage Gage Gage visuai (see 6.1) Visual (see 6.1) Visual Visual 7 Provided by IHSNot for R
28、esaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-50357 13 7779706 032bbbL 2 MIL-P-50357 (Mu) -4.3.2.3 Metal Parts, Drawing Di0551926 (after paint). - Defect Method of Inspection CRITICAL Visual (probe 1. Metal defective light) MAJOR 101. 102 103 104. 105 106. 107. 108.
29、 W. 110. ll1. 112. 113. MINOR 201. 202. 203. 204. 205 e 206. Pitch diameter of large thread, max. Pitch diameter of large thread, min. Minor diameter of large thread, max. Pitch diameter of small thread, max. Pitch diameter of small thread, min. Minor diameter of small thread, max. Diameter of bourr
30、elet, max. Length of effective thread, min. (forward) Length of thread, min. (rear) Paint in cavity inadequate Pool of paint in cavity Thread(s) damaged or not full Foreign matter Gage Gage Gage Gage Gage Gage Gage Gage Gage Vi sua1 Visual Visual Visual Paint on threads Vi sua1 Paint not dry Visual/
31、Tactile Paint inadequate or damaged Visual Marking missing, incorrect or illegible Visual Corrosion preventive compound missing from rear threads visual Corrosion preventive compound missing from forward threads . Visual 4.3.2.4 Packed carton (prior to sealing). mTTcAL None defined MAJOR None define
32、d a I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P- 50357 (MU) 4.3.2.4 (conk d) Defect - MINOR 201. Support missing or damaged 292. Separator missing or damaged 203. Improper assembly 204. Incorrect number in carton 4.3.2.7 Packed carton (af
33、ter sealing). CRIClrICAL Method of Inspection Visual Visual Visual Visual None defined MAJOR None defined 201. Carton damaged, cut or gouged through all layers Visual 202. Carton not cmpletely sealed Visual 203. Contents loose Visual 204, Marking missing, incorrect or illegible Visual Inspection tes
34、ting.-The following tests shall be performed in 4.3.3 accordance with the provisions of 4.4. 4,3.3.1 Mechanical properties. 4.3.3.1.1 Hardness test. 4.3.3.1.1.1 Stress relieve lots.-Twenty-five cold shaped bodies from the first batch of each cold shkping lot (as defined by 4.3.1.2) processed through
35、 the stress relief furnace ana five bodies from each hours production thereafter for the balance of the lot shall be subjected to a hardness test with a Rockwell Hardness Tester or by any other method approved by the procuring activity, to assess uniformity of the product. Hardness values shall be r
36、ecorded. 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-4.3.3.1.1.2 Miscellaneous lots,-Each miscellaneous lot shall be subjected to the hardness test listed in paragraph 4.3,?.1.1.1. 4.3.3.1.2 Tension test. 4.3.3.1,2.1 Stress relieved lots.-Two b
37、odies, one of the hardest and one of softest, as determined by the hardness test frm the first twenty-five bodies selected in accordance with 4.3.3.1.1.1 shall be subjected to this test. Failure of any tension test specimen to comgly with the mecanical properties requirement of the applicable drawin
38、g shall be cause for rejection of the lot. When it has been determined that the mechanical properties comply and furnace temperature and time have been established, the furnace temperature and time shall be maintained throughout the stress relief lot. may vary within twenty-five degrees F. but not b
39、elow the minimum temperature of TOO degrees F. Ud the soak time of 30 minutes minimum. and time will be recorded every hour to assess adequate control of stress relief equiplent. by an independent method, stress relieved lots shall be selected in accordance with 4.3.3.1.2.1. of any tension test spec
40、imen to comply with the mechanical properties requirement of the applicable drawing shall be cause for rejection of the lot. the number of samples shall be selected for miscellaneous lots. The flirnace temperature hirnace temperature The flunace temperature will be calibrated every eight hours 4.3.3
41、.1.2.2 fi-scellaneous lots .-Snmples for the tension test of miscellaneous Failure Double 4.3.3.1.3 Hardness pattern. 4.3.3.1.3.1 Stress relieve lots .-me samples supplied in accordance with 4.3.3.1,2.1 shall also haue a hardness pattern obtained to determine the hardest and softest section within t
42、he projectile and the basis for selecting the tension test specimens hereinafter prescribed. mechanical properties of the aBplicable drawing shall be cause for rejection of the lot. Failure to comply With the 4.3.3.2 Magnetic particle inspection. 4.3.3.2.1 After stress relief and finish machining,bo
43、dies shall be inspected by mgnetic particle inapection techniques approved by the respon- sible technical agency according tothe following sequence. a. 100 percent magnetic particle inspection will be in affect until 2500 consecutive bodies have been inspected and found to be free of metal defects.
44、b. Reduced inspection may then be instituted for magnetic particle inspection consisting of 30 bodies per hour for ten consecutive working days. 10 I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-50357 23 9974906 0326664 - - 4.3.3.2.1 (Contd)
45、 C. If no defect is found during the ten days, the sample may be reduced to i5 bodies per hour for five consecutive working days. d. If no defect is encountered during the five days, the sample may be reduced to 5 bodies per hour. e. If a defect is encountered by magnetic particle inspection during
46、In addition a 100 percent back screening to the last reduced sampling (b through d) he magnetic particle inspection shall revert back to (a) abwe. acceptable hours production Will be performed. f. For requalification of reduced sampling, the manufacturer must Should a controversy arise as to the val
47、idity of an indication, follow the same procedures as outlined in paragraphs (a through d) above. g, the manufacturer shall use matallographic test methods or an approved non- destructive method for proof of acceptability to the responsible technical agency . by paragraph (a) above, shall not be use
48、d as an alternative procedure in lieu of corrective manufacturing process action to eliminate a continuing process induced defect. the Government reserves the right to withdraw acceptance inspection until the contractor can prove his process is capable of producing suspect free projectiles, h. Conti
49、nual application of a 100 percent magnetic parSicle inspection If corrective.action is not instituted and the cause eliminated, 4.3.3.3 Protective coating.-The sample size and acceptance criteria shali be in accordance with the assembiy drawinn and the reauirements of the specifications listed thereon. of the applicable specifications shall be cause for taking the corrective action recommended there
