1、I INCH-POUND I MIL-P-63225A (AR) AMENDMENT 4 SU PERS ED ING AMENDMENT 3 28 MARCH 1990 12 July 1989 MILITARY SPECIFICATION PROJECTILE, GUIDED, 155MM, M712 . CONTROL SECTION FOR This amendment forms a part of Military Specification MIL-P-63225A (AR), dated 26 April-1984, and is approved for use within
2、 the U.S. Army Armament, Munitions and Chemical Cortirriand and is available for use by all Departments and Agencies of the Department of Defense. c PAGE 2 2.1.1: Add the following Military Specifications: “MIL-STD-6866 - Inspection, Liquid Penetrant MIL-H-6875 - Heat Treatment of Steels (Aerospace
3、MIL-STD-2154 - Inspection, Ultrasonics, Wrought Metals, MIL- I - 23 135 - Inspection Materials, Penetrant MIL-STD-45662 - Calibration Systems Requirement“ Practice, Process for) Process for Add the following paragraph: “2.2 Other publications. The following documents form a part of this specificatio
4、n to the extent specified herein, unless otherwise indicated, the issue in effect on the date ofinvitation for bids shall apply: E4 - Verification of Testing Machines E8 - Tension Testing of Metallic Materials E18 - Tests for Rockwell Hardness of Metallic Materials E139 - Recommended Practice for Co
5、nducting Creep, Creep-Rupture and Stress Rupture Tests of Metallic Materials Testing of Steel Products Materials A37PI - Standard Method and Definitions for Mechanical E399 - Plane Strain Fracture toughness of Metallic 1 of 14 FSC 1320 c DISTRIBUTION STATEMENT A. Approved for public release; distrib
6、ution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-b3225A (4) 13 7779706 0412761 7 m MIL-P-63225A (AR) AMENDMENT 4 (Copjes may be purchased directly from the American Society for Testing and Materials, 1916 Race Street, Philade
7、lphia, PA 19103). ANSI-B46.1 - Surface Texture (Application or copies should be addressed to the American Material Standards Institute, 1430 BKoadway, New York, New York, 10018). PAGE 3 3,3.1.1.4 Delete in its entirety and substitute the following: “3.3.1.1.4 Pneumatic power requirements. The contro
8、l section shall require helium gas per BB-H-1168 or nitrogen gas per BB-N-411 at 800 psi minirriuiri for non-flight testing.“ PAGE 4 3.3.1.3.1 Insert the following after the first sentence: “Adjustment of the fin lock is permissible to meet these r equ i remen t s . II PAGE 6 * Delete Figure 1 in it
9、s entirety and substitute the included Figure i. PAGE 9 Add the following new paragraphs: “3.3.3 Welding of control housing. The weld zone shall meet the strength requirements of the finished iten. 3.3.4 Control housing integrity. 3.3.4.1 Ultrasonic examination. The weld zone shall be ultrasonically
10、 inspected using an angle beam method. No discontinuity shall be acceptable which is niore than 1DB below that obtained from the least responsive notch in the reference standard per Figure 6. 3.3.4.2 Fluorescent penetrant examinations. There shall be no indications of cracks, laps, seams, or tears w
11、hen fully machined part is inspected by fluorescent penetrant inspection, 3.3.5 Mechanical properties. Mechanical properties of the Contxol Housing shall be as required on the applicable drawing. e 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MI
12、L-P-6 32 2fiA (AR) ANENDMENT 4 i n puiX oma Vo l t s 16 12 8 4 W COKUND AND ACTUATOR 1 a 2 U H E o rn pi Wl 2 H H 4 4 3 .a c m 8 t (v i5 tn C rn 9 O c rl O LI -lJ C O u 4 MIL-P-63225A (4) 13 I 7779706 0412766 B I : a FF5 ana a LI LI O W O -lJ Nia a,C -oa, rl 7.u OW cm rn -E mo o -4 u u 7 (28) Provid
13、ed by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-63225A (LI) 13 M 7779906 0412767 T I MIL-P-63225A (AR) AMENDMENT 4 4.5.8.3 Elongation. Acceptance shall be based on the average elongation of all tensile specimens selected from each housing. If a tensi
14、le specimen fails within the weld zone, then that particular elongation value shall not be used in computing the average elongation. if the average elongation is less than 10 percent, then the lot represented by this test sample shall be rejected. 4.5.9 Mechanical properties of control housing weld.
15、 4.5.9.1 Tensile testing. A housing that contains the first weldment from each weld lot and a different housing that contains the last weldment shall be selected for this test. Four (4) tensile bars shall be selected from each weld of each housing per paragraph 4.5.12 to determine compliance with te
16、nsile strength, yield strength and elongation requirements. Failure to meet the requirements of 3.3.3 shall be cause for rejection. f 4.5.10 Hardness. In order to determine uniformity of heat treatment, each body shall be subjected to a hardness test after final heat treatment with a Rockwell Hardne
17、ss Tester or any other method approved by the procuring activity. Readings shall be taken on the rear face of the control housing. The test shall be made using the procedure for performing this test as prescribed by ASTM E-18 and ASTM A-370. c 4.5.11 Tensile strength, yield strength and percent elon
18、gation. The hardest and softest bodies as determined by the hardness test in 4.5.10 from each heat treat lot shall be subjected to this test. The criteria for performing the test shall be as prescribed by ASTM E-8. 4.5.11.1 Control housing. FOUE (4) tensile specimens shall be selected from each hous
19、ing. The specimens shall be selected approximately 90 percent apait and shall be the largest obtainable longitudinal specimens prescribed by ASTM 6-8. 4.5.12 Tensile testing of weld. Four (4) tensile specimens shall be selected from the weld section, 90 degrees apart, per 4.5.9.1. The specimens shal
20、l be the largest obtainable round type specimen as prescribed by ASTM E-8. The weld cross- section shall be in the middle half of the gage length of the tensile specimen. the samples shall be taken after welding and stress relieving. The samples shall then be heat treated to the requirements of the
21、control housing and tested per ASTM E-8, Failure to meet the applicable strength and elongation requirements shall be cause for rejection of the lot. 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-b3225A (4) 13 M 9799906 0432768 3 E c MIL-P-
22、63225A (AR) AMENDMENT 4 4.5.13 Fluorescent penetrant inspection. Fluorescent penetrant inspection shall be performed on 100 percent of the housings after the final machining and heat treating. Inspection shall be in accordance with Group VI MIL-1-25135 and MIL-STD-6866. Both sides of the part shall
23、be examined. Parts examined by penetrant and found acceptable shall be ink stamped or stenciled with the letter iiPci . The marking shall withstand normal handling. 4.5.14 Ultrasonic inspection. Each lot of housings shall be ultrasonically examined after weld flash removal and stress relief. 4.5.14.
24、1 Procedure. Ultrasonic testing shall be conducted following the general principles outlined in MIL-STD-2154. Calibration of the ultrasonic system using reference standards containing simulated discontinuities shall be perforrried at the beginning of each test run of given part, after each 30 minute
25、s during a run, at the end of each run, and any time that a malfunction is suspected. If any check reveals that the system is not functioning properly, all of the material that has been examined since the last acceptable check shall be reexamined. Calibration shall be perforrried by obtaining respon
26、se from each of the simulated discontinuities associated with the zone under test, setting the various controls such that the least of the responses triggers the alarm, and then increasing the system gain by 1 DB for production part testing . 4.5.14.2 Ultrasonic inspection standards. Reference stand
27、ards shall be of the same thickness, material and configuration as the parts being examined. discontinuities will be circular segment notches circumferentially cut into the I.D. and O.D. of each weld zone. See Figure 6. For each weld zone 1.D- and O.D. there will be 3 notches. One at the near side o
28、f the weld zone, one at the nominal center of the weld zone, and one in the far side of the weld zone. The reference standard shall be appropriately treated to inhibit corrosion.“ Simulated 4.5.15 Fracture toughness tenting. 4.5.15.1 Slow bend fracture toughness test. When a specimen taken from a ho
29、using as selected per paragraph 4.5.8.2 is tested and exceeds the ultimate strength requirement of 280,0p1 psi but is less than 290,000 psi, slow bend (three point bending) fracture toughness tests are required. The bend testing shall be conducted in accordance with the requirements and procedures o
30、f ASTM E399. The specimens shall be tested with acceptance based on the average fracture 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-63225A (4) 13 7999706 0912769 3 m MIL-P-b3225A (AR) AMENDMENT 4 toughness. if the average fracture toughn
31、ess is below the mininiuni allowable, the heat treated lot represented shall be rejected or subjected to retemper and retest for all mechanical properties. 4.5.15.2 Fracture toughness specimen selection. Three (3) specimens shall be taken from the housing that exhibited the high ultimate strength re
32、adings (above 280 Kpsi). If both housings exhibit high ultimate strength readings then the housing with the highest hardness reading shall be used for specimen selection. The three specimens shall be selected in the longitudinal direction and taken from the aft end of the housing. The specimen shall
33、 have a crack plane orientation L- C as shown in Figure 7. The specimen dimensions shall be within the tolerances shown in Figure 9. c 10 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NOTES: 1. NOTCH CROSS SECTIONAL AREA 0.00174 SQ. IN. 2. I.D. NOT
34、CH HAS SAME DIMENSIONS AS SHOWN ABOVE FIGURE 6 c 11 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-P-63225A (9) 13 777770b OLi12771 1 I I. MIL-P -6 3 2 2 5A AblENgMENT 4 (AR) CRACK PLANE ORIENTATION FOR COPPERHEAD CONTROL SECTION FIGURE 7 12 Pr
35、ovided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-c MIL-P-63225A (9) 13 W 9799906 0412772 3 MIL-P-63225A (AR) TNDMENT -T W v)W n n- U ww ww c 13 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-b3225
36、A (4) 13 979770b 0432773 5 E MIL-P-63225A (AR) AMENDMENT 4 PAGE 66 “6.7 Weld upset (Advisory). It has been found that acceptable welds have been poduced with upset lengths of between 0.230 to 0.305 inches. Mating surfaces of parts to be inertia welded should be of the same inside diameter and same w
37、all thickness, 6.8 Holding grip marks (Advisory) It is recommended that holding grips be so configured as to not allow slippage of component more than 0.100 inch in the welding operation. Furthermore, adequate surface should be provided to avoid the slippage, and to resist the torque developed durin
38、g welding, without deforming the part.“ The margins of this amendment are marked with an asterisk or vertical line to indicate where changes (additions, modifications, corrections, deletions) from the previous amendment were made. This was done as a convenience only and the Government assumes no lia
39、bility whatsoever for any inaccuracies in these notations. Bidders and contractors are cautioned to evaluate the requirements of this document based on the entire content irrespective of the marginal notations and relationship to the last previous amendment. Custodian: Army - AR Preparing activity : Army - AR (Project 1320-AB93 ) F 14 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
