1、a MIL-C-L2Lbb L3 W 777370b 0273977 4 W 14 AugTt i952 SUPERSEDrnG U. S. Army 27-154-1B 14 June i943 MILITAHSC SPECIFICATIC? 1 SCOPIF ARD CLASSIFICATION .1 Scope, - Thle specification covere one grade of electrolytic copper rod in the ooldilrawn condition wed in the manufacture of crusher. cylinders o
2、r preesure cylin6ere for cannon, emrllarme, pistole, and revolvers. 1.2 Sizes. - Rob shall be AirnienSa in the following altem, ai epecified: 0.252 inch dlrwter O.2S55 inch &uneter 0.14% inch hmter - MLpfBRI XU-SID-3.29 - Elarkng of Shipasnte (opies of apecipications, e+awaras, an drawings mqiiima b
3、y contractors in connection with specific procttrenient functiom should be obtains8 A.osathe procuring egenoy or ab drecb by th4 contracting officer). 3. m- 3.1 Material. 3.1.1 Material 8m be of te bst pbe of elibctrowic copper rod pad, by 3.2 Chemical requilWn6nt.B. 3.2.1 The matmial shall contain
4、not lea8 than 99.90 percent copper, eilver 3.2.1.1 A chemical analyeis of each lot of material shall be furnished by the either hot rolling or extrueion and finlahob by cold-drawing to the epeclfid d(niar being cotma 88 copmr. manufacturer ter. Provided by IHSNot for ResaleNo reproduction or network
5、ing permitted without license from IHS-,-,-3.7 Dimensione and talerancea. I 3.3.1 Diamatsr. - Rud ehall not vary from the ordered diameter, nor be out-f- round. by mm than the amounts ehown in Table I. Table I. - Pemesible variationa In diameter and out-of-rounneee. O. 252 0,001 0,001 .2255 .o01 .O0
6、1 I . 1456 .O01 ,001 I 1/ Out-of-round is the ifference between the niaxiWm. and niinimmn diaajbkr of the rod msasure at the same cmse-eection. 3.3.2 Isn&h. - nlese oth4rwise qmcifled, rods shall be furnished in rendam bngtha of 6 to 10 feet. 3.3.3 Straightneee. - The copper rode ehall be straight w
7、ithin the limits of goo6 caampercial practice. 3.4 Tenele requremnte. - Rode shall conformC tb tensile roqummente ehown in Table II. Table II. - Tensile requiremnte. 1 - i Teneile I $longation Feya letrength, lin lO-inches, -I 1.25 I 0.75 3.5 Electrical Reeistivitg.*.- The retietivity of the rod ae
8、eapplle shall not exceed 0.15940 ohm (meter, gram) at 20 C. 1.7930 microhm-cgntimeter). per cubic centimeter (0.32117 pornide per cubic inch) at 20 C. to lots coneacutivey by the contractor and,following the serial number, by the firet letter of the nam6 of the contractor. smooth, bright, and etraig
9、ht and &all be free from pite, die rmrke, pipee, slvera, lape, oracke, twiste, eeame, aoA-mtallic inclasion8, damaged ende and other injurious defecte. fabricaticm. 4. 4.1 - Ut. - A lot shall coneiet of all rods of the ttm size fKIia the lllb billet . 4.2 Samplee for Goverment analyeis ehall be take
10、n from at least 10 pqcent of the rods in the lot. Each sample shall coneiet of not lese tium 2 ouzcea of drll&Ale -. and shall be analyzed separately. hie reaietivity is equivalent to The eneity of the copper aha0 be taken ae 8.89 graire 3.6 Identification. - %ch lot shall be identified by a aerial
11、number aeelgned 3.7 Worlnaanehlp. - Rods ahall be uniforn in quality ana tempur, clean, eod, o jointe shall be made in the mitSrial at any tiPb during SAMPIJnG, iS“I0IV AND TESJ! -5 e Q Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-32Lbb 13 7
12、97770b 0294003 7 m - MIL-c-E (Om) 4.3 Tenelcm bete. 4.3.1 At least two tO1181On teete eball be =de for each lot. 0 ahipwnt. accep.taace for safo traneportatlon by coman or other carrlera to tb point of &lveq. 5.L.2 All robs aball be packed in bores or crates eo oanetrucM ae to lnepr, 5.2 Mark-. - Ea
13、 shipping container eh11 be Barked with *be lap, of tha material, the lotnmr, the diameter, the weight oonkineil, thle epcifiatioa number, the paip8 of the contractor ana the number of th6 contract or purcMse ordar, anil In addition ehallbe marked In accordance with Militmy Standami Ma-SED-l29. 1 6
14、 NTES I 6.1 Intended me. - The copper rod covered by this specification is intendsd - for u80 in te manufacture of copper crusher cylindsrs or pressure cylinbre for determining e SEUOE in the testing of propellants and ammunition. the accuracy required in the gas prosaurs msaauPe,msnte, uniformity
15、in chemical composition and in tensile propertiee ie of the greatest importance. Dus to The varioue 1 sizes of rob are intended for use a8 followe: 0.252 Mjr- and. mediwcaliber cannon. 0.2255 -11 arm and minor caliber cannon. o. 1456 Pistols and revolvers. 6.2 ordering data. - Purchasere ahould epec
16、ify the title, nmbor, and dab I of this epeclflcatlon, the diamster of tb rod, and rshouad exercite aiy &sirSb option offered herein bee 3.3.2). HWIVE: whsn Govermwnt draringe, spsciffca-tiioncl, orabhor daia are for any purpose other than in connection with a deflu%by relate G0ve-t procurement oper
17、ation, the Onited States Goverment thereby incure no reapon6lbillty nor arij obligatoai wateoever: an tim fact tb%tn, hernim8nt ipay have fommsteil, funiiaeb, or in any way supplied tim aaib rawinge, epeciflcatims, or other &ta, le not to be regarde& by llcatlcm or otherwtm ae ia any mer liconeing tb 1 hoMer or any other pereon or corporation, or emvying any righte or permiemion to manufacture, use, or eo11 any patentab Invention %kt my in any 1 - I 3 -. be related Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
