1、MIL -8 -13468A( MU) 21 March 1966 SUPERSEDING MIL-S -13468(Ord) June 15, 1954 MILITARY SPEC IF ICATION STEEL, COPPER ALLOY CLAD; STRIP (for Small Caliber Bullet Jackets) 1. SCOPE 1.1 This specification covers annealed copper alloy clad steel strip for small caliber bullet jacket cups. 2. APPLICABLE
2、DOCUMENTS 2.1 The following documents of the issue in effect on date of invitation for bids or request for proposal, form a part of the specification to the extent specified herein. SPECIFICATIONS MILITARY MIL-C-3993 - Copper and Copper Base Alloy Mill MIL-C-21768 - Copper Alloy Numbers 210 (Gilding
3、 Products, Packaging of 95%) and 720 (Commercial Bronze, 90%) Sheet and Strip STANDARDS FEDERAL Fed. Test Method Std. No. 151 - Metals; Test Methods Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-13468A 13 %I 979990b 0295341 3 m: irig Procedur
4、s5 and Tables for Inspection by Attributes ey Assuranse Temo and Definitions ng for ShHpment and Souage (Copies of epeeifications , standards drawings, and pub licatisns required by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as direc
5、ted by the contracting officer .) P. REQWIREHEITTS 3.1 Chemical conmosition. 3.1.1 Comer alloy. The composition of the copper alloy cladding shall conform to the requirements of I4lL-C-21768, copper alloy No. 220. 3.1.2 Steel. The composition of the steel shall conform to the requirements specified
6、in table Z. Table I. Chemical composition of steel E leatents Percent Carbon, max. ,13 Manganes e .25 -0.60 Phosphorus, max, .O5 SulDhur. Z3X. .O6 Silicon, max. .o7 3.2 The steel shall be rimmed OP semi-kflfed with aluminum. 3.3 Mechanical DrORKtieS. 3.3.1 Hardness. The hardness of the steel core sh
7、all not exceed Reckwell B60 or Rockwell 30T 56.5. 3.4 DIlC .cl-. 3.4.1 The thickness, width and permissible variations therein of clad steel strip shall be as specified in the invitation for bids, in the contract or purchase order. The strip shall be furnished with a No. 3 edge (slit). Provided by I
8、HSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-139bA 13 9 797770b 0295392 5 9 -. - KZL-!34ht is obtained. Cal- culate for thickness of the cladding.) Care shall be exercised so that the cladding is removed from only me side at a time to determine cmformanc
9、e with 3.4.3. A sample of the clad (c) A magnetic method. (:. In addition to any special marking required in the contract or order (see 6.2) marking for shipment shall be in accordance with MIL-STD-129. 6. NOTES 6.1 Intended use. Material covered by this specification is used in cups or small arms a
10、munition bullet jackets. 6.2 Ordering data. Procurement documents should specify the following: (a) Title, number and date of this specification. (b) Flat lengths or coils. The side of the strip having the greater thickness of copper alloy cladding shall be identified by stamping or other suitable m
11、ethod. When mils are specified, the side of the strip kav%nq the greater thickness of cladding shall be on the inside of the coil. (c) (d) draft circulation should be based on the information in the current WDISS 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
