ARMY MIL-C-50797-1973 CASE CARTRIDGE 20MM M103A1《M103A1型20MM弹药筒》.pdf

1、MIL-C-50777 33 W 777770b 03311233 2 m JXCL-C-50797 (MU) 25 May 1973 SUPERSEDING LCA-PD-58 7 June 1967. . : .:. : . . . .:. .-. . A- .: : :%?-z (“:.- .A ._ * . . . . The sample shall be manufactured .using the same materials, equipment, processes and procedures as will be used in regular production.

2、Identification shall be in accordance with MIL-STD-1168. Examination and test.-After inspectiori and provisional acceptance . - .- . . 4.2*1.1 . at source, the sample will be inspected for all requirements of the drawings and specifications at a Government laboratory or such other facility speci- 4.

3、2.1.2 with requirements of the drawings and specifications will result in sample disapproval . 4.3 Quality conformance inspection . . . fied by the contract. (see 6.4) ,- -I Initial production saniple failure. -Failure of the sample .to comply 5. - *- . . ._ I .i . 4.#3;1.- .Submissiomof -product.-T

4、he product shall .be submitted in accordance . . . . wi h:SlEoKiiL, . I-. -, * _ . r. i., I,: :,:.:;.;!, :, If a split ,.,. t.- t I 1 “; ;i I.: .: ! ; * r: ._ . I . - ,. I 4.3.4.1 to the contracting officer for disposition, if a malfunction or casualty not covered by this specification, occurring in

5、 any firing test, indicates . that the product is unsuited for the purpose intended. Unlisted firing defects.-The lot shall be suspended and referred , 4.3.5 Packing and marking inspection. -Inspection for packing and marking shall comply with applicable requirements of MIL-STD-1169. 4.3.6 Inspectio

6、n equipment -Index of Inspection Equlprnent List No; bZL 11075813 identifies the applicable Inspection Equipment List required to . perform examinatKon and tests prescribed herein. Equipment design shall be in accordance with code designation on the applicable IEL (reference is made to Inspection Eq

7、uipment List for definition of coding, Dwg, B11057228, a detail of IEL 11075813) 4.4 Test methods and procedures. . . . . 4.4.1 The Rockwell scales referenced for use in testing the case hardness at the Hardness.-The method of test shall be as specified in ASTM E-18-67 various locations, shall be as

8、 specified by Dwg. D11075813, Each unit of the test sample shall be sectioned as shown by that drawing. sections shall haveapproximately parallel surfaces finished to 63 mim- inches or finer, care being taken not to change the hardnessin obtainfg that finish, Hardness determinatlon shall be made at

9、the body and neck locations as shown on Dwg. D11075813, Section “A“ an both halves of the sectioned case, .from the case head shall be averaged. on one surface of head section at the locations 8s shown on Dwg, D11075813, Section I$. The two or four hardness values, as applicable,.that are the same d

10、istance from the case head shall be averaged The average hardness values shall be used to determine compliance with requirements, 4.4.2 Cold shut.-The method of test shall be as specified in ASTM L317-54. The specimens for test shallbe the head sections from the sample prepared The head The four har

11、dness values from locations the same distance Hardness determinations shall be made . . for dtermination of the hardness requirements of 4.4,l. examination of the etched test specimens for cold .shuts within the area identified by Figure 1 shall be made under 75-100 magnifications. Macioscpic -. . =

12、. j-*l-,:.;,+: : I:,:. .,*,i,;*;: y.:, ;J;* .,; 1. ;y . ,. ; i , . , . “ c ?q-E . ,Y. -. .,: : .;: . ,r-L-*-*. . .&+i& FOLDS OR COLD SHUTS MST NOT EXTEND IN ACCEPTABLE CASES. FIGURE i (CASE, CARTRICGE, 2GM M, MIOSAI ) i2 * U. S GOVERNMENT PRINTING OFFICE 1973-714-546/5766 .-. r Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-