1、MIL-PRF-46676B (AR) w/AMENDMENT 1 7 August 2008 SUPERSEDING MIL-PRF-46676B (AR) 10 October 2006 PERFORMANCE SPECIFICATION FLEXIBLE EXPLOSIVE This specification is approved for use by the US Army Armament Research, Development, and Engineering Center (ARDEC) and is available for use by all Department
2、s and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification describes performance requirements and quality assurance provisions for two grades of flexible explosive (see 6.1.1) designated as: Grade A, for Navy use (See Table I) Grade B, for Army use (See Table I) 2. APPLICABL
3、E DOCUMENTS 2.1 General. The documents listed in this section are specified in Sections 3 or 4 of this specification. This section does not include documents cited in other sections of this specification or recommended for additional information or as examples. While every effort has been made to en
4、sure the completeness of this list, document users are cautioned that they must meet all specified requirements of documents cited in sections 3 and 4 of this specification, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specif
5、ications, standards and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract (see 6.2). AMSC N/A FSC 1375 DISRIBUTION STATEMENT A. Approved for public release; distribution is
6、unlimited.Comments, suggestions, or questions on this document, should be addressed to, U.S. Army ARDEC, ATTN: AMSRD-AAR-QES-E, Picatinny, New Jersey 07806-5000 or emailed to ardecstdznconus.army.mil. Since contact information can change, you may want to verify the currency of this address informati
7、on using the ASSIST online database at http:/assist.daps.dla.mil. INCH-POUND Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-46676B (AR) w/AMENDMENT 1 2INTERNATIONAL STANDARDIZATION AGREEMENTS STANAG 4489 - Explosives, Impact Sensitivity Test
8、s DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-C-401 - Composition B DEPARTMENT OF DEFENSE STANDARDS MIL-STD-650 - Explosive: Sampling, Inspection, and Testing MIL-STD-1168 - Ammunition Lot numbering and Ammunition Data Card MIL-STD-1916 - DoD Preferred Methods for Acceptance of Product (Copies of these
9、 documents are available online at http:/assist.daps.dla.mil or from the Standardization Documents Order Desk, 700 Robbins Avenue, Bldg. 4D, Philadelphia, PA 19111-5094.) 2.3 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a conflict between the text of this do
10、cument and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Qualification. The flexible explosive furnished under this specificatio
11、n shall be products that are authorized by the qualifying activity for listing on the applicable qualified products list before contract award (see 4.1.1 and 6.4). 3.2 Conformance Inspection. When specified, a sample of flexible explosive shall be subjected to qualification conformance inspection (S
12、ee 4.1.2) 3.3 Support and ownership requirements. 3.3.1 Form. The flexible explosive shall be in sheet form of uniform thickness. Width, thickness, and length of sheets will vary and shall be as specified for each solicitation. (See 6.2) 3.3.2 Color. Unless otherwise specified, the color shall be ol
13、ive drab. 3.3.3 Workmanship. The flexible explosive shall be free from cracks, voids, air bubbles, holes, blisters, dirt, and other impurities. 3.4 Operating Requirements. 3.4.1 Physical Properties. The flexible explosive shall conform to the physical properties listed in Table I. Provided by IHSNot
14、 for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-46676B (AR) w/AMENDMENT 1 3TABLE I. Physical properties. Property Grade A (Navy Use) Grade B (Army Use) Detonation Continuity Uniformly Depressed N/A1Detonation Velocity (MPS), min 6600 6600 Shock Sensitivity Non
15、e2N/A1ERL Bruceton Impact Sensitivity Not more sensitive than Comp B N/A1Friction Sensitivity None2None2Electrostatic Sensitivity None2None2Bullet Impact Sensitivity None2None2Bar Drop Impact Sensitivity None2None2Flame Sensitivity None2None2Density (g/cc), min 1.4 1.4 Exudation (Wt. %), max 0.10 0.
16、10 Vacuum Stability (mL), max 5 5 Cracks at 160F, (in), max 0.0625 0.0625 Cracks at -40F, (in), max 0.0625 0.0625 Color Change No Change No Change DMDNB3Content (Wt.%) 1.25 0.25 1.25 0.25 Notes: 1 - N/A indicates no requirement 2 - None indicates that the requirement is for no energetic reaction. 3
17、- DMDNB refers to the taggant 2,3-Dimethyl-2,3-Dinitrobutane Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-46676B (AR) w/AMENDMENT 1 44. VERIFICATION TABLE II. Requirements/verification cross reference matrix. Method of Verification Classes
18、 of Verification 1- Analysis 2- Demonstration (end item test) 3- Examination 4- Test A1 Qualification for Grade A A2 Qualification for Grade B B1 Conformance for Grade A B2 Conformance for Grade B Verification Method Verification Class Section 4 Section 3 Requirements Description 1 2 3 4 A1 A2 B1 B2
19、 A1 A2 B1 B2 3.3.1 Form X X X X X 4.2.1 3.3.2 Color X X X X X 4.2.2 3.3.3 Workmanship X X X X X 4.2.3 TABLE I Detonation Continuity X X 4.3.1 N/A N/A N/A TABLE I Detonation Velocity, MPS, min X X X X X 4.3.2 TABLE I Shock Sensitivity X X 4.3.3 N/A N/A N/A TABLE I Sensitivity: ERL Bruceton Impact X X
20、 4.3.4 N/A N/A N/A TABLE I Friction Sensitivity X X X 4.3.5 N/A N/A TABLE I Electrostatic Sensitivity X X X 4.3.6 N/A N/A TABLE I Bullet Impact Sensitivity X X X 4.3.7 N/A N/A TABLE I Bar Drop Impact Sensitivity X X X X X 4.3.8 TABLE I Flame Sensitivity X X X 4.3.9 N/A N/A TABLE I Density X X X X X
21、4.3.10 TABLE I Exudation X X X X X 4.3.11 TABLE I Vacuum Stability X X X 4.3.12 N/A N/A TABLE I Cracks at 160F, in (max) X X X X X 4.3.13 TABLE I Cracks at -40F, in (max) X X X X X 4.3.14 TABLE I Color Change X X X 4.3.15 N/A N/A TABLE I DMDNB Percent X X X X X X 4.3.16 4.1 Classification of verific
22、ation. The verification requirements specified herein are classified as follows: a. Qualification inspection b. Conformance inspection 4.1.1 Sampling for tests. Forty pounds of Flexible explosive of the specified dimensions are required for both qualification and conformance inspection by the variou
23、s tests in Section 4.3. The samples shall be selected at random from a single production lot. Samples for tests shall be taken in accordance with MIL-STD-1916, unless otherwise specified in Section 4. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-M
24、IL-PRF-46676B (AR) w/AMENDMENT 1 54.1.2 Qualification inspection. Upon formal application, flexible explosive qualification shall consist of specified tests for all requirements specified in Section 3, (see Table I). 4.1.2.1 Qualification rejection. If a product fails to meet any of the requirements
25、 specified in Section 3, that product shall not be qualified, and shall not be listed on the QPL. 4.1.3 Conformance inspection. When specified, conformance inspection of product lots shall consist of specified tests for all the requirements in Section 3 except for those indicated in Table 2 to be no
26、t required. 4.1.3.1 Lot Formation A lot shall consist of one or more batches of flexible explosive in accordance with the same processing operation, conditions, drawing, and specification. Lot interfixing shall be in accordance with MIL-STD-1168. 4.1.3.2 Rejection of lots. If a product sample fails
27、to pass any of the specified tests, the production lot represented by that sample shall be rejected. 4.2 Support and ownership verification. 4.2.1 Form. Samples shall be taken from the production lot as specified and examined using standard measuring equipment to verify form dimension and thickness
28、requirements. 4.2.2 Color. A specimen shall be examined visually for conformance to paragraph 3.3.2. 4.2.3 Workmanship. The lot shall be visually inspected for any cracks, voids, air bubbles, holes, blisters, dirt, and other impurities. Evidence of said impurities shall be cause for lot rejection. 4
29、.3 Operating verifications. 4.3.1 Detonation continuity. A sheet of explosive 0.080.004 inches by 3 inches by 10 inches shall be attached to a steel witness plate at least inch thick by means of adhesive coating. The witness plate shall be large enough to back the entire slab of explosive. A militar
30、y M6 blasting cap or equivalent shall be secured against the middle of the 3 inch side of the charge, and the assembly shall be mounted in a steel water tank capable of being pressurized to 10,000 psi. The charge shall be detonated after 45 minutes under a measured 10,000 psi hydrostatic pressure, a
31、t ambient temperature. After detonation, the witness plate shall be uniformly depressed and shall show no plateau indicative of a detonation discontinuity. A discontinuity in detonation shall be cause for rejection. 4.3.2 Detonation Velocity. Two specimens, by by 12 inches, shall be attached to a wo
32、oden bar inch by 1 inch by 9 inches with two 9/32 inch holes 7.871 inches from center to center. One end of the specimen shall be even with one end of the bar and the other end shall have a three inch overhang which is used for the starting relay. Chronograph contactors shall be inserted into the ho
33、les of the bar so that they are flush with the explosive. The contactors shall be Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-46676B (AR) w/AMENDMENT 1 6connected to an electronic counter which measures microseconds. An M6 blasting cap or
34、 equivalent shall be used to initiate the specimen. If any specimen fails to comply with the requirement, the lot shall be rejected. NOTE it is important that the lead wires from the contactors be turned away from the blasting cap so that the initial detonation does not start the counter. The rate o
35、f detonations shall be calculated as follows. Where: A = time in microseconds R = rate in meters/second (MPS) 4.3.3 Shock sensitivity. The cylinder case for the drop test shall be constructed of mild steel with walls of 0.06 inches thick and having internal diameter of 5 inches and a length of 12 in
36、ches. The case shall have threaded mild steel caps, 3/8 inch thick. A charge of flexible explosive shall be pressed so as to fill the case snugly. The case shall be fixed horizontally beneath a weight of 336 pounds, equipped underneath with 3 equally spaced steel studs (3 inches long and inch in dia
37、meter) so that when the weight is dropped the studs will penetrate the top surface of the case. Ten cases shall be tested by dropping the weight on each case from a height of 5 feet. A blast or explosion shall be cause for rejection, a fire unaccompanied by a blast or explosion is permissible. 4.3.4
38、 ERL Bruceton impact sensitivity. The ERL Bruceton impact sensitivity test shall be performed in accordance with STANAG 4489. The impact machine shall be standardized using Composition B Type II conforming to MIL-C-401. A 50 percent initiation height lower than that for Composition B shall be cause
39、for rejection. 4.3.4.1 Sample Preparation. Approximately 5 grams of Composition B shall be ground and screened on a sieve stack consisting of a 16 mesh (U.S. Standard) on top, a 30 mesh in the middle, and a 50 mesh on the bottom. The material remaining on the 16 mesh and the material passing through
40、 the 50 mesh sieves shall be discarded. Equal amounts of material on 30 and 50 mesh sieves shall be thoroughly mixed. The Composition B shall be made into pellets weighing 35 2 milligrams, and having a diameter of 0.188 0.002 inches. The pellets shall be pressed at 30,000 pounds per square inch. Twe
41、nty five samples of Flexible Explosive having a diameter of 0.188 0.002 inches and a weight of 35 2 milligrams shall be prepared for this test. 4.3.5 Friction sensitivity. A sample 1/8 x 1/8 x 1/32 of an inch shall be placed on an anvil of the sliding friction machine having a friction surface of (3
42、04 stainless steel) 60 micron finish. A force of 900 to 1000 pounds shall be applied to the friction surface and a velocity of approximately 8 feet per second to the anvil by striking it with a pendulum dropped from a 90 degree position. Twenty samples shall be selected for this test. Any evidence o
43、f decomposition whether light or sound shall be cause for rejection. R = 0.2 A 1,000,000 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-46676B (AR) w/AMENDMENT 1 74.3.6 Electrostatic sensitivity. A sample approximately 0.250 inches in diamet
44、er and 0.100 inches thick shall be placed on a metal anvil of the electrostatic machine. The metal needle of the machine shall be adjusted so that when depressed the needle is 0.03 0.003 inches from the anvil surface. The anvil and the needle shall be connected to a condenser circuit having a voltag
45、e of 3000 to 4000 volts and capacitance that with the voltage will produce a 4.0 joule spark. The needle shall be rapidly depressed into the sample. Twenty samples shall be selected for this test. Any flame or explosion shall be cause for rejection. 4.3.7 Bullet impact sensitivity. Ten rounds of 7.6
46、2mm M80 ball cartridge or commercial .308 equivalent shall be fired from a gun perpendicular to the target at 40 feet. The target shall consist of a flexible sheet if explosive inch by 3 inches by 3 inches sandwiched between a 1/16 inch thick mild steel front plate and 1 inch mild steel back-up plat
47、e. If any of the bullets cause the specimen to explode the lot shall be rejected. 4.3.8 Bar drop impact sensitivity. Ten specimens with length and width of 1 inch and 0.050 0.010 inches in thickness shall be selected for this test. A 10 pound steel bar with a diameter of inch at the striking face sh
48、all be dropped from a height of 15 feet into a piece of flexible explosive placed on a steel anvil. If any specimen tested is accompanied by an explosion or burning, the lot shall be rejected. 4.3.9 Flame Sensitivity. One specimen by by 3 inches shall be placed into sawdust soaked with kerosene and
49、ignited. If a specimen explodes the lot shall be rejected. 4.3.10 Density. Three specimens shall be weighed to the nearest milligram and measured with a suitable instrument to determine the volume. The density shall be calculated by the formula below. If the average of the three tests fails to comply
