1、- MIL-P-543LA 73 7977706 OLL4567 2 m h/- 43-00 MI L-P- 5431A (AS) l? Mag 1967 SUPERSEDING MIL-P- 5431(Aer). 28 December 1954 MILITARY SPECIFICATION PLASTIC-PHENOLIC, GRAPHITED, SHEETS, RODS, TUBES AND SHAPES This specification has been approved by the Naval Air Systems Command, Department of the Nav
2、y. I- 1. SCOPE 1.1 Scope - This specification establishes the requirements for a laminated phenolic graphited material. 1.2 Classification - The laminated phenolic graphited material covered by this specification shall be furnished in the following forms, as specified: Form S - Sheets Form Rm- Rods,
3、 molded Form Tm- Tubing, molded Form U - Shapes * 2. APPLICABLE 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 this specification to the extent specified herein. SPECIFICATIONS Federal MMM- A- 13 2 Adhesives, Heat
4、Resistant, Air Frame Structural; Metal to Metal PPP-B- 585 Box, Wood, Wirebound PPP-B-591 Box, Fiberboard, Wood-Cleated Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-543LA 73 m 7777906 OLLg56 MIL-P-5431A (AS) Feder ai (Continued) PPP-B-601 PP
5、P-B-621 PPP-B- 636 Military MIL-P- 116 MIL- G- 6 71 1 MIL-P-7936 STANDARDS Federal Fed. Test Method Std. No. 406 Milit arg MIL-STD- 105 MIL-STD-129 -MIL-STD-831 Box, Wood, Cleated - Plywood Box, Wood, Nailed and Lock-Corner Box, Fiberboard Preservation, Methods of Graphite, Lubricating Parts and Equ
6、ipment, Aeronautical, Preparatioi for Delivery Plastics: Methods of Testing Sampling Procedures and Tables for Inspection by Attributes Marking for Shipment and Storage Test Reports, Preparation of (Copies of specifications, standards, drawings, and publications required by suppliers in connection w
7、ith specific procurement functions should be obtained from the procuring activities or as directed by the contracting officer. ) 2.2 Other publications - The following document forms a part of this specification to the extent specified herein. Unless otherwise indicated, the issue in effect on date
8、of invitation for bids or request for proposal shall apply. CONSOLIDATED CLASSIFICATION COMMITTEE Uniform Freight Classification Rules. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- * MIL-P-543LA 73 a 7777906 OLL4567 b a MIL-P-5431A (AS) (Applic
9、ation for copies should be addressed to the Consolidated Classi- fication Committee, 202 Chicago Union Station, Chicago 6, Ill.) 3. REQUIREMENTS * 3.1 Preproduction - The material furnished under this specification shall be a product which has been tested and passed the preproduction tests speci- fi
10、ed herein. * 3.2 Material - The material shall consist of a suitable fabric base reinforcement, properly impregnated and bonded with phenolic resin containing 6.4 to 6.6 percent by weight of inert free graphite. The material shall be of high quality, and processed to conform to the requirements of t
11、his specification. (see 4 * 3.2.1 Construction - 3.2.1.1 Form S (sheets) - Sheets shall be formed by subjecting layers of impregnated sheets to heat and pressure. 3.2.1.2 Form Rm (rods) - Round rods shall be processed from laminations of impregnated sheet material molded in cylindrical molds under h
12、igh temperature and pressure to rods. 3.2.1.3 Form Tm (tubing) - Tubes shall be made by winding the im- pregnated sheet material on a mandrel and molding under heat and pressure. 3.2.1.4 Form U (shapes) - Special shapes pressed in a mold and cured. under heat and pressure shall show dimensions as sp
13、ecified by the procuring activity. 3.3 be drilled, tapped, sawed, and machined in any direction without cracking or splitting. Machinability - The material shall be of such quality that it can 3.4 Color - The molded material shall be natural in color. The natural color shall be the color of undyed i
14、ngredients used, and shall be sub- stantially uniform in color, black or nearly black throughout. A grayish color on sawed, sanded, or machined surfaces is permissible. 3.5 Surface finish - The surface finish of sheet material shall be polished, semigloss, dull, or sanded as specified. Rods and tubi
15、ng shall be finished ground, or ground and buffed as specified. Shapes shall have a semigloss or ground finish as specified. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-5q33A 73 m 777770b 0334570 2 Outside diameter (Inch) MIL-P-5431A (AS)
16、 Permissible warp, maximum (Percent) L/ 3.6 Surface defects - 1/8 to 1/4, inclusive Over 1/4 to 3/4 Over 3/4 3.6.1 Sheets - Formed sheets shall be fabricated free from blisters, cracks, wrinkles, or other defects. Edges, drilled holes, machined, milled or ground faces of laminated material shall be
17、smooth and shall exhibit a neat appearance . 2. o 1. o O. 50 3.6.2 Rods, tubing and shapes - Molded tubes shall be free from blisters, pronounced mandrel scores, and loose layers, and as free as possible from resin pockets, voids, and heat marks. Molded tubes shall be free from seam cracks. Rods and
18、 shapes shall be free from blisters and mold seam cracks and reasonably free from voids and resin pockets. Drilled holes, ma- chined, milled or ground faces of rods and shapes, shall be smooth and shall present a neat appearance. 3.7 Warp or twist (Applicable only to sheets 36 inches and greater in
19、length and in width) - The warp or twist of material, as delivered, shall not exceed that shown in Table I. Percentage of warp is given in terms of the lateral dimensions (length and width), of the material; percentage of twist is given in terms of dimensions from one corner to the opposite corner.
20、TABLE I WARP OR TWIST Thickness (Inch) 1/32 to under 1/16 1/16 to under. 1/8 1/8 to 1/4, inclusive Over 1/4, up to and including 3/4 Over 3/4 Permissible variation, on basis of 36-inch dimension (Maximum percent) 5.00 2.50 1.00 O. 50 O. 25 3.7.1 The warp of material furnished in the rod or tube form
21、, as delivered, shall not exceed the following: - i/ Percentage of warp is specified in terms of a 36-inch length of the materid o Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-5LI31A 73 - 9979706 OLL4571 4 MIL-P-5431A (AS) * 3.8 Physical pro
22、perties - The material shall conform to the physical property values as shown in Table II. TABLE II PHYSICAL PROPERTIES Physical test Tensile strength (sheets only), psi (see 4.6.4) Strongest direction 90 to strongest direction Compressive strength (sheets ody) Flatwise, psi (see 4,6.5.1) Edgewise,
23、psi (rods only) L/ psi (see 4.6.5.2) (tubes only) 2/ psi (see 4.6.5.2) Compressive strength axially Compressive strength axially Flexural strength, flatwise (sheets-of nominal thickness up to and including 2. O inches) (see 4.6.6.1) Strongest direction, psi 90“ to strongest direction, psi Flexural s
24、trength psi (rods only) ?/ (see 4.6.6.2) Moisture absorption (see 4.6.7) Sheet Thickness (inches) i/ 1/32 1/16 3/32 3/16 1/8 u4 1/2 3/4 1 Limits Minimum Minimum Minimum Minimum Minimum Minimum Minimum Minimum Minimum Maximum Maximum Maximum Maximum Maximum Maximum Maximum Maximum Maximum Value 9,000
25、 8,500 37,000 24,000 20,000 19,000 14,500 13,500 13,000 4.50% 2.20% 1.80% 1.60% 1.30% 1.10% o. 75% o. 75% O. 65% 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-5431A (AS) TABLE II (Continued) Physical test 1 Hardness (Rockwell) sheets ody (s
26、ee 4.6.8) Flatwise Moisture absorption (see 4.6.7) (Continued) Rod - Diameter of 1/4 inch up to 1/2 inch Diameter of 1/2 inch up to 1 inch Diameter of 1 up to 2 inches Tube Wail thickness from 1/16 up to 3/32 inch Wall thickness from 3/32 up to 1/8 inch Wall thickness from 1/8 up to 3/16 inch Wall t
27、hickness from 3/16 up to 1/4 inch Wall thickness from 1/4 up to 1/2 inch Wall thickness from 1/2 up to 1 inch Wall thickness = 1 inch I Specific gravity (all forms) (see 4.6.9) I Plastic flow (sheets only) (see 4.6.10) Interlaminar bonding strength psi (see 4.6.11) sheets oniy Limits Maximum Maximum
28、 Maximum Maximum Maximum Maximum Maximum Maximum Maximum Maximum Minimum Minimum Maximum Minimum Value 1.7% 1.3% 1.2% 3.0% 2.2% 2.0% 1.8% 1.6% 1.2% 1.1% 103 1.34 O. 6% 2,500 - 1/ 1/4 to 2 inches in diameter - 2/ ID 1/4 inch or greater; wall thickness 1/16 inch or greater - 3/ 1/4 to 1 inch in diamet
29、er - 4/ For intermediate thicknesses, the value for the next smaller thickness shall apply 3.9 Dimensions and tolerances - 3.9.1 Form S (sheets) - Sheets shall be furnished in standard sizes 36 inches square +I inch. Manufacturers standard sheet sizes 36 x 42 inches kl inch and 36 x 59 inches k1 inc
30、h will be acceptable. Nonuniform standard sheet dimensions caused by cutting specimens for tests required by this specification shaU not be cause for rejection, unless particular dimensions are specified in the contract or order. Where sheets are to be cut to size, the dimensions (length and width)
31、shall be within the tolerances shown in Table III. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-543LA 93 m 9999906 OlLq573 8 9 1/32 to 1/4, inclusive 17/64 to 1/2, inclusive 1-33/64 to 2, inclusive 33/64 to 1, inclusive 1-1/64 to 1-1/2, incl
32、usive MIL.- P- 5431 A (AS) TABLE III TOLERANCE ON LENGTH AND WIDTH OF SHEETS o. O10 o. 012 O. 015 O. 018 o. 022 Tolerance on 6 inches or under Nominal thickness Inches I Inch :ngth or width, plus or minus Over 6 to 24 inches 24 inches or over I Inch I Inch O. 015 O. 017 0020 O. 030 O. 040 1/32 1/32
33、1/32 1/16 1/16 3.9.1.1 fied. Sheets or pieces cut or punched from sheets shall be within the tolerances specified in Table IV. At least 90 percent of the area of the sheet shall be within the tolerances specified, and at no point shall the thickness vary from the nominal by a value greater than 125
34、percent of this specified tolerance. Thickness - Sheets shall be furnished in thickness as speci- TABLE IV TOLERANCES ON THICKNESS OF SHEETS Nominal To1 er anc e thickness (inch) (inch) plus or minus 1/32 O. 0065 3/64 O. 0075 1/16 O. 0075 3/32 o. O09 1/8 o. O10 5/32 o. o11 3/16 O. 0125 7/32 O. 014 P
35、lus only 1/4 O. 030 5/16 O. 035 3/8 O .O40 7/16 O. 044 Nominal Tolerance (inches) plus only thickness (inch) 1 1- 1/8 1- 1/4 1- 3/8 1- 1/2 1- 5/8 1- 3/4 1- 7/8 2 2-1/4 2- 3/4 2-1/2 O. 065 O. 069 O. 073 O. 077 O. 081 O. 085 O. 089 O. 093 O. 097 O. 105 O. 113 o. 121 Nominal Toler ance (inches) plus on
36、ly thickness (inch) 4 O. 163 4-1/2 O. 179 5 o, 190 5- 1/2 o. 210 6 O. 230 6-1/2 O. 240 7 O. 260 7-1/2 O. 280 8 O. 290 8-1/2 O. 310 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-5Ll33A 73 7777906 033457.4 T M Nominal Tolerance Nominal Tolera
37、nce (inch) plus or minus (inches) plus only thickness (inch) thickness (inch) MIL-P-5431A (AS) TABLE N (Continued) Nominal Tolerance (inches) plus only thickness (inch) Plus only 1/2 O. 048 5/8 O. 053 3/4 O. 058 7/8 O. 062 3 O. 130 9 O. 320 3-1/2 O. 146 9-1/2 O. 340 10 O. 360 - 1/ On sheets of nomin
38、al thickness not listed above, the tolerance shall be the - 2/ Where closer tolerances are required, the maximum and minimum thicknesses same as specified for the next greater thickness. shall be as specified in the particular order. Rod length Inches O to 3, inclusive Over 3 to 6, inclusive Over 12
39、 Over 6 to 12, inclusive 3.9.2 Form Rm (rods) - Unless otherwise specified, rods shall be furnished in manufacturers standard lengths of 24 to 36 inches with a tolerance of plus or minus 1 inch. Where rods are to be furnished cut to length, they shall be circular sawed within the tolerances shown in
40、 Table V. Tolerances, plus or minus, for rods of the following diameter 1/4 to 1-5/16 inches 2 to 4 inches Inch Inch o. O10 o. O10 o. O10 O. 015 O. 015 o, 020 O. 030 O. 030 TABLE V TOLERANCESONRODLENGTHS 3.9.2.1 Round rods shall be furnished in diameters as specified. The tolerances shown in Table V
41、I shall apply. 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-5433A 73 M 9979906 0334575 3 1/4 2 MIL-P-5431A (AS) 1- 15/16 O. 005 4 O. 008 TABLE VI TOLERANCES ON ROD DIAMETERS 3/16 to 2 inches 2 to 4 inches For nominal diameters Tolerances p
42、lus Or minus Over 4 inches I I -Inches I Inches 1 Inch 3.9.3 furnished in manufacturers standard lengths with a tolerance of plus or minus 1 inch. Where so specified, the tubing shall be furnished cut to length, circular sawed, within the tolerances specified in Table VII. Form Tm (tubing) - Unless
43、otherwise specified, tubing may be TABLE VI1 TOLERANCES ON LENGTH OF TUBING I Inches I Inch I Inch I Inch O to 3; inclusive Over 3 to 6 inclusive Over 6 to 12, inclusive Over 12 to 48, inclusive o. O10 o. O10 O. 015 O. 030 o. O10 O. 015 o. 020 O. 030 O. 030 O. 030 O. 030 O. 050 3.9.3.1 Standard size
44、s - The following steps shown in Table VIII shall be considered standard for inside and outside diameter sizes of round tubing. 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_ MIL-P-5LI31A 93 m 9999706 Oll457b 3 M Tube sizes Inche s 1/4 to 23/32,
45、 inclusive 3/4 to 1-15/16, inclusive 2 to 4, inclusive 4-1/8 to 12, inclusive I MIL-P-5431A(AS) Tolerance (plus or minus) Inside diameter Outside diameter Inch Inch O. 003 O. 005 O. 004 O. 005 O. 008 O. 008 o. O10 O, 025 TABLE VIII NOMINAL TUBING SIZES By steps of Nominal inside and outside diameter
46、s in inches 1/4 to 1, inclusive Over 1 to 3, inclusive Over 3 to 6, inclusive Over 6 to 8, inclusive 1/32 1/16 1/8 1/4 3.9.3.2 Tolerance, inside and outside - Round tubing shall conform to the specified dimensions for nominal inside and outside diameters, within the tolerances specified in Table M.
47、TABLE JX TOLERANCES ON TUBING DIAMETERS 3.9.3.3 Tolerances, wall thickness - Tubing shall conform to the wall thickness tolerances specified in Table X. 3.9.4 Form U (shapes) - 3.9.4.1 General - The dimensions of laminated graphited phenolic material in the form of special shapes shall be as specifi
48、ed in the particular order or as shown on drawings. 10 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-543LA 73 7777906 OLLY577 5 Wall thickness Inch 1/16 and less than 1/8 1/8 and less than 1/4 1/4 to 1/2, inclusive TABLE X Thickness tolerance
49、s, plus or minus Inch O. 015 o. 020 o. 020 Less than 2 2 to 4 Over 4 to 12 Over 12 1 I I O. 015 o. 020 O. 025 O. 030 3.9.4.2 Tolerances - Where shapes are in the form of angles, channels, Permissible warp shall be as or rectangular tubes, the dimensions specified in the contract or order shall be maintained within the tolerances shown in Table XI. specified in the
