1、MIL-W-48230 (PA) 3 Deceinber 1973 SUPERSESSION See 6.6 MILZTARY SPECIFICATLON 1. SCOPE 1.1 This specification covers the quality assurance provisiom and special requirements not covered by the draw- ings, for one type of warhead designated as Warhead, 2.75 Inch Raeket, M229. 2. APPLICrnIE DOCUMENTS
2、2.1 The fdIowing documents of the issue in effect on date of invitation for bids, or request for proposals, form a part of this specification to the extent specified herein. SPECIFICATIONS lKCJ-lITARY NIL-A-2550 - Ammunition and Special Weapons; General Specification for STANDARB FEDERAL FELSDi5i -
3、Yktals, Test Methods MTIJTAY WL-STNO - Sampling Procedures and Tables for Inspection by Attributes MILSTD-iog - Quaiity Assurance Terms TION AQL, 100% OR REQMT. CATEGORY CHARACTERISTICS PARA. REF. PARA. METHOD OF INSP. CRITICAL: None Defined MAJOR : GROUP AQL 0.65% 101. Diameter inside at front O. 4
4、0 3.1 Plug, Taper 102. Diameter inside O. 40 3.1 Plug, Taper 103. Metal Defective O. 40 3.3 Visual MINOR : None Defined 12 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-W-4 8 23 O (PA - CRITICAL. MAJOR: 101. 1Q2. 1. Hydrostatic Test 4.3.3.6 3.2
5、 4.4.6 2. Hydrostatic stamp mis sing 100% 3.2 Visual 3 Air Test 4.3.3.7 3.2 4.4.7 4. Ah pressure stamp missing 100% 3.2 Visual GROUP AQL 2.5% (Except 124) - Concentricity of pitch iameter of fuze thread with outside diameter between the bourrelets including perpendicular- ity of front face O. 40 Con
6、centric i ty thread plug with fixtured indicatar 3.2 Concentricity of counterbore at frnt of fuze thread with pitch diameter of thread O. 40 3.2 Concentricity thread plug 13 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-103. Concentricity of diamet
7、er at rear of fuze thread undercut (if ap- plicable) with pitch diameter of threads O. 40 104. Concentricity of ogive with outside diameter between the bourrelets. O. 40 105. Concentricity of base at rear of thread w/pitch diameter of base thread O. 40 106. Concentricity of base at rear of threads w
8、ith out- side diameter between the bourre let s O. 40 107. Concentricity of the rear bourrelet w/outside diameter between the bourre- lets 0.40 i4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-/t/r/r/f/f/f PARAGRAPH SHEET 3 DRAWING NUMBER Warhead,
9、2.75 Rocket M229, Metal Parts Assy. 92 18 69 9 OE 5 COVERING DETAIL OF DUG. 1 NIA f.3,.2,7 before painting INSPECTION AQL, 100% OR REQMT. CATEGORY CHARACTERISTICS PARA. REF. PARA. METHOD OF INSP. 108. Concentricity of the forward bourrelet dout s ide i ame t er between the bourrelets O. 40 3.2 Fixtu
10、red indicator perpendicular to out- side diameter between %he bourrelets o. 40 3.2 Fixtured indicator 110. Length of fuze thread (if applicable) O. 40 3.2 Thread Plug 111. Diameter of counterbore at front fuze thread 0.40 3.2 Set ring w/indi- 109. Motor body seat not cator 112. Diameter of thread un
11、dercut (if ap- plioable) O. 40 3.2 Set ring us/indi- cator 113; Dianeker of rear of fuze thread (Pear of thread undercut if appli c ab e ) O. 40 3.2 Set ring w/indi- cator 114. Diameter of nase be- tween the forward bourrelet and ogive O. 40 3.2 Adjustable snaD 115. Diameter of base at reap of threa
12、d O. 40 3.2 Adjustable snap 15 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-16 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- _ - - - - MIL-W-48230 (PA) . PARAGRAPH SHEET 5 DRAWING NUMBER 9218699
13、 Warhead, 2.75“ Rocket M229, Metal Parts Assy. OF 5 COVERING DETAIL OF DWG. 4.3.2.7 before painting N/A 1 INSPECTION AQL, 100% OR REQMT. CATEGORY CHARACTERISTICS PARA. REF. PARA. METHOD OF INSP. Improper radii or chamfer o. 65 3.2 Visual Improper surface 3.2 Visual Location of rear Gap on OD between
14、 nose and body ex- cess ive O. 65 Evidence of poor workmanship other than that covered under Major cate- gory above o. 65 3.4 Visual finish o, 65 o. 65 3-2 Flush pin gage Feeler gage 3.2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-W- 4 8 230
15、(PA) . PARAGRAPH SHEET 1 DRAWING NUMBER 9218699 Warhead, 2.75“ Rocket, OF 2 COVERING DETAIL 4.3.2.8 M229, Metal Parts Assy. OF DWG. AMT. OF INSP. N/A INSPECTION AQL, 100% OR REQMT. CATEGORY CHARACTERISTICS PARA. REF. PARA. METHOD OF INSP. . CRITICAL : None Defined MAJOR: 101. 102. 103. 104. 105. 106
16、. 107. 108 109. 110. GROUP AQL 1.00% (Except 109 ea130 Pitch dia. of fuze thread O. 40 3.2 Minor dia. of fuze thread, max. O. 40 3.2 Pitch dia. of rear thread O. 40 3.2 Major dia. of rear thread, min. O. 40 3.2 Thread damaged or not full O. 40 3.2 Foreign matter Dia. of rear Dia. of forward bourrele
17、t, max. O. 40 3.2 in cavity O. 40 392 bourrelet, max. O. 40 3.2 Salt Spray 4.3.3.9 3.5 Drop Test 4.3.3.10 3.2 Thread plug Plain cylindrical Plug Thread ring Adjustable snap Visual Visual Ring Ring 4.4.8 4.4.9 18 Provided by IHSNot for ResaleNo reproduction or networking permitted without license fro
18、m IHS-,-,-Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-W-48230 cp) 4.3.3 Testing, 4.3.3.1 Hardness Test on Nose - Major Defect.-To in- sure compliance with the mechanical properties requirements, each nose casting from a sample shall be subjec
19、ted to a hardness test with a Brinell Hardness Tester. The sample, 10 percent minimum representative of extreme furnace envi- ronment, shall be selected from each heat treat batch when a batch type furnace is used for final heat treatment. When a batch type furnace is used for final heat treatment,
20、the following shall be substituted for a batch. For identi- fication purposes, any quantity of nose castings, but not to exceed 4 hours production of the final heat treatment that have been subjected to final heat treatment in the same furnace, at the same temperature for the same length of time or
21、conveyor speed, shall be considered a heat treat- ment batch. The heat treatment batch thus constituted shall form the basis for selecting sample castings for the tension test hereinafter prescribed. The test shall be performed as specified in 4.4.1, using equipment in accordance with 4.3.4. 4.3.3.2
22、 Tension Test on Nose - Major Defect.-Two (2) nose castings from each heat treatment batch, one of the hardest and one of the softest, as determined by 4.3.3.1, shall be subjected to this test. Failure of one or more tension test specimens to comply with the physical require- ments of the applicable
23、 drawing shall be cause for rejection of the batch represented by the specimen. The test shall be performed as specified in 4.4.2, using equipment in ac- cordance with 4.3.4. 4.3.3.3 Hardness Test on Body - Major Defect.-To in- sure compliance with the mechanical properties requirements, each nose c
24、asting from a sample shall be subjected to a hardness test with a Brinell Hardness Tester. The sample, 10 percent minimum, representative of extreme furnace en- vironment, shall be selected from each heat treat batch when a batch type furnace is used for final heat treatment. When a continuous type
25、furnace is used for final heat treat- ment, the following shall be substituted for a batch. Por identification purposes, any quantity of body castings, but not to exceed 4 hours production of the final heat treat- ment furnace, that have been subjected to final heat treat- ment in the same furnace,
26、at the same temperature, for the same length of time or conveyor speed, shall be considered a heat treatment batch. The heat treatment batch thus con- stituted shall form the basis for selecting sample castings for the tension test hereinafter prescribed. The test shall be performed as specified in
27、4.4.3, using equipment in accordance with 4.3.4. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-W-48230 (PA) 4.3.3.4 Tension Test on Body - Major Defect.-Two (2) body castings from each heat treatment batch, one of the hardest and one of the sof
28、test, as determined by 4.3.3.3, shall be subjected to this test. Failure of one or more tension test specimens to comply with the physical require- ments of the applicable drawing shall be cause for rejection of the batch represented by the specimen. The test shall be performed as specified in 4.4.4
29、, using equipment in accor- dance with 4,3.4, 4.3.3.5 Tension Test on Base - Major Defect.-Two (2) bases from each heat treatment or stress-relieved batch of 1,000 or fraction thereof, shall be subjected to the tension test in accordance with 4.4.5, to determine compliance with the mechanical proper
30、ties requirements of the applicable drawing, When steel bases are used, two (2) bases from each heat treatment or stress-relieved batch of 5,000 or fraction thereof shall be subjected to the tension test. Failure of any specimen to comply shall be cause for rejection of the batch represented by the
31、specimen. The test shall be per- formed as specified in 4.4.5, using equipment in accordance with 4,3.4. 4.4.3.5.1 Retest.-When one or more tension test speci- mens fail to comply with the yield strength or elongation requirements of the applicable component drawing, the re- jected batch may, at the
32、 discretion of the contractor, be re-heat-treated, or new samples of a higher or lower hard- ness value or both may be selected (if this was the basis for selecting samples). A new sample may also be cut from the same test casting if a visible defect was present in the test bar. When maximum and min
33、imum hardness values have been determined by compliance with the tensile test specimens with the mechanical properties requirements of the component drawing, these values shall be used as a basis for accepting or rejecting each nose casting within that batch. All castings within the batch whose hard
34、ness values fall outside the established range shall be rejected subject to reheat treatment and resubmission for test. 4.3.3.6 Hydrostatic Test - Critical Defect.-Each metal parts assembly shall be subjected Co the required internal hydrostatic pressure to determine compliance with require- ments o
35、n dwg. 9218699. Failure of any assembly to comply shall be cause for rejection of the assembly. Metal parts assemblies which comply shall be stamped with the letter “H“ as indicated on the assembly drawing. performed as specifted in 4.4.6, using equipment in accor- dance with 4.3.4 The test shall be
36、 2 1. . ,- I L- Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MI L - W - 4 8 2 3.0 ( PA ) 43.3.7 Air Pressure - Critical Defect.-Each body as- sembly that has passed the hydrostatic pressure test, as indicated by the letter “H“ stamped on the body,
37、 shall, after completion of the drying cycle, be subjected to sub- merged air pressure test. Any body assembly failing to comply with the requirements specified on dwg. 9218699, as evidenced by air bubbles rising to the surface of the water, shall be rejected. Air bubbles caused by entrapped air on
38、the outside of the shell shall not be cause for rejection of the body assembly. Body assemblies which comply with the requirements of dwg, 9218699 shall be stamped with the letter “A“ as indicated on the assembly drawing. The test shall be performed as specified in 4.4.7, using equipment in accordan
39、ce with 4.3.4. 4.3.3.9 Salt Spray Test - Major Defect.-The sample size for this test shall be as follows: During production, one (1) warhead from each days production shall be subjected to the salt spray test as specified in 4.4.8, until five (5) consecutive days production have successfully passed
40、the test, Sampling shall then be reduced to one (1) sample twice per week. If, upon reduced sampling, one (1) failure occurs, corrective action shall be taken and sampling shall revert to one specimen from each days production until five (5) consecutive days production have again successfully passed
41、 the test. If two (2) consecutive failures occur after the contractor has been notified to take corrective action in either the original sampling plan or the reduced sampling plan, inspection for acceptance will be stopped until corrective action has been taken. Any specimen (war- head) which does n
42、ot comply with any of the following test criteria shall be considered a failure. The specimen, when subjected to the salt spray test specified in 4.4.8, shall show no more than 1/8 inch creepage, blistering or loss of adhesion of the paint as measured from the scribe mark. At all other points there
43、shall be no more than a trace of film failure, such as blistering or corrosion, and not more . than twenty (20) scattered blisters, none larger than 3/16 inch in diameter on the painted surface of the warhead. This is intended that the maximum amount of corrosion in the salt spray test be comparable
44、 to photograph 8-1 in ASTM Standard 4.3.3.8 ID Gap Inspection - Major Defect.-A sample of fifty (50) unpainted assemblies, randomly selected from each lot, shall be inspected for evidence of gap (any discernible separation between nose and body section on ID at brazed joint). If one or more of the a
45、ssemblies inspected show evidence of one continuous gap over an arc in excess of five (5) degrees, or the total of all the gaps discernible equal an arc in excess of ten (10) degrees, the lot represented by the sample shall be rejected. MIL-U-48230 13 999990b 0317b36 2 a Provided by IHSNot for Resal
46、eNo reproduction or networking permitted without license from IHS-,-,-Method of Evaluation Degree of Resistance to Rusting Obtained with Paint or Iron and Steel Surfaces, D610-43. This test shall be performed as specified in 4.4.8, using equipment in accordance with 4.3.4. Drop Test - Major Defect.-
47、Beginning with the first lot and continuing until five (5) consecutive lots have been tested, a sample from each lot shall be subjected to a drop test as specified in 4.4.9, using equipment in accordance with 4.3.4. Upon satisfactory results from five (5) consecutive lots, the contractor may reduce
48、the testing to a sample from one randomly selected lot per month. The contractor shall return to the five-lot requirement upon failure of any lot. The sample shall consist of 23 randomly selected painted assemblies which have passed al1 other re- quirements of this specification. The lot represented by the sample shall be rejected if two (2) or more warheads fail to comply with the inspection criteria. If only one (I) warhead fails, a retest is permissible as follows: domly selected from the lot shall be subjected to the drop test in accordance with 4.4.9. If on
