1、ri -_, - % NIL-B-70838 (1) 96 9 9999906 0493208 5 9 4 *- a I INCH-POUND I MIL-B-70838 (AR) AMENDMENT 1 15 Aiigust 1991 MILITARY SPECIFICATION BILLET, DEPLETED URANIUM This amendment forms a part of Military Specification MIL-B-70838 (AR), dated 19 May 1989, and is approved for use by the U.S. Army A
2、rmament, Munitions and Chemical Command and is available for use by all Departments and Agencies of the Department of Defense. Page 4 3.3.2 Records. Delete tfUDL-R-22706A11 and substitute “DI-T-2072“. 3.4 Chemistry. 0.25 weight percent maximum 235 (“235) Delete: “Uranium Uranium (U) 99.95 weight per
3、cent minimumIl 8 h- and substitute: “Uranium (U) 99.94 weight percent minimumt1. 3.6 Matrix inclusions. Delete: “3.6 Matrix inclusions. Billets shall be free from matrix inclusions larger than 0.0008 inch (0.080 inch at 1OOX) with a concentration not to exceed 11 inclusions per 0.02-inch square (2-i
4、nch square at 1OOX) .II and substitute: “3.6 Matrix inclusions. Billets shall be free from matrix inclusions larger than 0.0008 inch (0.080 inch at 1OOX) with a concentration not to exceed 176 inclusions per 0.02-inch square (2-inch square at iOOX).ll AMSC N/A 1 of 5 FSC 9650 DISTRIBUTION STATEMENT
5、A. Approved for public is unlimited. release; distribution Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-1 MIL-B-70838 (1) 96 9999706 0493209 7 -e -11 and substitute: Ila. No more than two (2) valid (non-disregarded) test results from each plate sh
6、all fail to meet the requirements of 3.11 for each analysis (tensile strength, yield strength and percent elongation) in each alignment (longitudinal and transverse). The mean test result for each section of each plate shall meet the requirements of 3.11 for each analysis in each alignment; Page 27
7、4.5.2.3 Matrix inclusions. Delete : IlThe photomicrographs will be examined to determine compliance with 3.6. the Government in accordance with UDI-R-22706A (see 6.2.1).11 A copy of each photomicrograph shall be submitted to 4 Provided by IHSNot for ResaleNo reproduction or networking permitted with
8、out license from IHS-,-,-I +* 3, NIL-B-70838 (1) 7b 7999906 0493212 7 i -3 2% MIL-B-70838 (AR) AMENDMENT 1 and substitute: IIUsing a 2-inch square template divided into 0.5-inch squares, the region of the photomicrograph displaying the highest density of inclusions shall be identified and the number
9、 of inclusions counted by tallying the number of inclusions contained within each one-half inch square. sample to comply with the requirementk of 3.6 shall be cause for rejection of all billets represented by the sample. each photo- micrograph from the first article sample shall be submitted to the
10、Government in accordance with DI-T-2072.11 Failure of any A copy of Page 31 TABLE II. Data Requirements. Delete 11UDI-R-22706A11 (three places) and substitute 11DI-T-207211 (three places). Custodian: Army - AR a Preparing activity: Army - AR (Project 9650-A061) 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
