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FSC 9525 Beneficial comments, recommendations, additions, deletions, clarifications, etc., and any data that may improve this document should be sent to: Commander, Naval Sea Systems Command, Department of the Navy, SEA 05Q,-2531 Jefferson Davis Hwy, Arlington, VA 22242-5160. QQ-N-286G 07 December 2000 SUPERSEDING QQ-... | QQ-N-286G.PDF |
QQ-N-286G 2 Form 3-Sheet. Condition: Cold rolled and annealed. Cold rolled, annealed, and age hardened. Form 4-Strip. Condition: Cold rolled and annealed. Cold rolled, annealed, and age hardened. Cold rolled, half or full hard, as rolled. Cold rolled, half or full hard, and age hardened. Form 5-Wire. Condition: Cold, a... | QQ-N-286G.PDF |
QQ-N-286G 3 2. APPLICABLE DOCUMENTS 2. 1 Government publications. The following documents, of the issues in effect on the date of invitation for bids or request for proposal, form a part of this specification to the extent specified herein: 2. 1. 1 Specifications and standards. FEDERAL STANDARD FED-STD-182 Continuous I... | QQ-N-286G.PDF |
QQ-N-286G 4 PUBLICATIONS NAVAL SEA SYSTEMS COMMAND T9074-AS-GIB-010/271-Requirements for Nondestructive Testing Methods. (Copies of this publication are available from the Naval Inventory Control Point, 700 Robins Avenue, Philadelphia, PA 19111-5094) 2. 2 Other publications. The following documents form a part of this ... | QQ-N-286G.PDF |
QQ-N-286G 5 2. 3 Order of precedence. In the event of a conflict between the text of this document and the references cited herein, the text of this document shall take precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENT... | QQ-N-286G.PDF |
QQ-N-286G 6 3. 4 Susceptibility to intergranular cracking. The material shall not be susceptible to intergranular cracking (see 4. 3. 6). 3. 5 Duplex grain structure. Duplex grain structure is not permitted in barstock with a diameter of 31/2 inches or less. Duplex grain structure is defined as any structure in which t... | QQ-N-286G.PDF |
QQ-N-286G 7 TABLE II. Mechanical properties (bar, rod, forged parts and plate unaged 1/). Hardness(maximum) Form Condition Size, inches Brinell (3000 kg) Rockwell Up to 4¼, incl. 245 C23 Hot finished Over 4¼ 260 C26 Hot finished and annealed All 185 B90 Rounds Cold drawn and annealed All 185 B90 Hot finished All 245 C2... | QQ-N-286G.PDF |
QQ-N-286G 8 2/ When specified (see 6. 2), for forged rings and discs, hardness measurements may be utilized in lieu of tensile tests. 3/ Applicable to both hot finished and cold drawn material. TABLE IV. Mechanical properties of sheet and strip. Form and condition Tensile strength lb/in² (minimum) Yield strength at 0. ... | QQ-N-286G.PDF |
QQ-N-286G 9 TABLE V. Tensile strength of cold drawn wire in coils. Condition Size (inches) Tensile strength lb/in² Cold drawn, as drawn All sizes 110,000-155,000 Cold drawn and annealed All sizes 110,000 max 0. 057 and less 1 / 165,000 min Over 0. 057 to 0. 114, inclusive 1 / 155,000 min Over 0. 114 to 0. 229, inclusiv... | QQ-N-286G.PDF |
QQ-N-286G 10 Inspection shall be performed after the aging treatment. Ultrasonic procedures other than those specified may be employed but they shall be approved by the command or agency concerned. 3. 7. 1. 2 Small bar, rod, plate and forgings. When specified (see 6. 2), bar, rod, plate, and forgings shall be ultrasoni... | QQ-N-286G.PDF |
QQ-N-286G 11 3. 9. 1. 5 Straightness. The permissible variations in straightness of rod and bar, as determined by the departure from the true straightness (throw in one revolution or depth of chord), shall be as specified in tables X and XI. 3. 9. 1. 5. 1 Permissible variations in straightness. The permissible variatio... | QQ-N-286G.PDF |
QQ-N-286G 12 TABLE VIII. Tolerances on diameter or distance between parallel faces of cold drawn rod and bar. Tolerances (inches) Ordered diameter or distance between parallel faces (inches) Plus Minus Under 1/2 0 0. 003 1/2 to 15/16, incl 0 0. 002 1 / Over 15/16 to 115/16, incl 0 0. 003 1 / Over 115/16 to 21/2, incl 0... | QQ-N-286G.PDF |
QQ-N-286G 13 TABLE X. Permissible variations in straightness of rod and bar. 1/ Ordered condition, finish, and size Permissible deviations in straightness (inches) Hot finished: 2 / Bar and rod (hot finished surface) Depth of chord 3 / 0. 050 per foot of length Rounds: Rough turned or rough ground Semismooth machined S... | QQ-N-286G.PDF |
QQ-N-286G 14 3. 9. 3 Plate, sheet, and strip. 3. 9. 3. 1 Thickness. The thickness tolerances of cold rolled nickel-copper-aluminum alloy sheet and strip, all conditions, shall conform to the requirements specified in table XII. The tolerances on thickness of hot rolled nickel-copper-aluminum alloy plate, all conditions... | QQ-N-286G.PDF |
QQ-N-286G 15 TABLE XII. Tolerances on thickness of cold rolled sheet and strip, all conditions. Tolerances on thickness for widths given 1 / (inches, plus or minus) Ordered thickness, (inches) Less than 12 inches wide 1/ 48 inches or less wide Over 48 to 60 inches wide, inclusive 0. 018 to 0. 025, incl 0. 002 0. 003 Ov... | QQ-N-286G.PDF |
QQ-N-286G 16 TABLE XIII. Permissible variations in weight and thickness of hot rolled rectangular plate. 1/2/ Specified 3/ Thickness (inches) Permissible excess in average weight 4 / per square foot of plate for widths given in inches expressed in percentage of nominal weights Under 48 48-60 excl. 60-72 excl 72-84 excl... | QQ-N-286G.PDF |
QQ-N-286G 17 TABLE XV. Permissible variations in width of sheared, machined, abrasive or plasma torch cut rectangular plate. 1/ 2/ Permissible variation in width for widths given (inches) Up to 30, Incl Over 30 to 72, incl Over 72 to 108, incl Over 108 to 144, incl Over 144 to 160, incl Specified thickness (inches) Plu... | QQ-N-286G.PDF |
QQ-N-286G 18 TABLE XVI. Permissible variations in width of sheared, machined, Abrasive or plasma torch cut rectangular plate. 1/ Permissible variation in length for lengths given (inches) 60 and under Over 60 to 96, incl Over 96 to 120, incl Over 120 to 240, incl Over 240 to 360, incl Over 360 to 450, incl Over 450 to ... | QQ-N-286G.PDF |
QQ-N-286G 19 TABLE XVII. Permissible variations in stock lengths of strip, up to 12 inches wide. Maximum permissible percentages, by weight, of short lengths Ordered nominal or stock length (feet) Required percentage by weight of stock length Over 8 to 10 feet, incl Over 6 to 8 feet, incl Over 4 to 6 feet, incl Over 2 ... | QQ-N-286G.PDF |
QQ-N-286G 20 TABLE XIX. Type of edge of strip. Thickness (inches) Width (inches) Type of edge 0. 125 and less 12 and less Slit 1 / Over 0. 125 8 and less Slit 2 / Over 0. 125 Over 8 Slit or sheared 2 / 1/In coil or straight (random or cut) lengths. 2/In random or cut straight lengths only. 3. 9. 3. 4. 3 Plate. Unless o... | QQ-N-286G.PDF |
QQ-N-286G 21 TABLE XX. Tolerances in diameter of cold drawn wire, all conditions. Tolerances (inches) Specified diameter(inches) Plus Minus To 0. 0044, incl 0. 0002 0. 0002 Over 0. 0044 to 0. 0079, incl 0. 00025 0. 00025 Over 0. 0079 to 0. 0149, incl 0. 0003 0. 0003 Over 0. 0149 to 0. 0199, incl 0. 0004 0. 0004 Over 0.... | QQ-N-286G.PDF |
QQ-N-286G 22 TABLE XXIII. Machining allowances for hot finished rod and bar (allow the following oversizes). Machining allowances (inch) 2 / Condition 1/ Dimensions (inches) Diameter Across flats (hexagons and squares) Thickness (rectangles) Width (Rectangles) Up to 0. 875 0. 125 0. 125 0. 125 0. 187 Over 0. 875-1. 875... | QQ-N-286G.PDF |
QQ-N-286G 23 3. 12 Workmanship. The material shall be uniform in quality and condition, clean, smooth, flat, commercially straight, and be free from foreign material and imperfections such as pipe, laps, cracks and seams which, due to their nature, degree, or extent may detrimentally affect the suitability for the serv... | QQ-N-286G.PDF |
QQ-N-286G 24 4. 2. 2 Sampling of lots. 4. 2. 2. 1 Chemical analysis. One representative sample shall be obtained from each lot. A) Ladle analysis may be used. B) For wire 0. 032 inch diameter and less, samples may be taken from the final starting size prior to the final cold reduction. 4. 2. 2. 2 Slow strain rate tensi... | QQ-N-286G.PDF |
QQ-N-286G 25 TABLE XXIV. Sample size for visual and dimensional inspections. Lot size Sample Size 2 to 8 All 9 to 15 8 16 to 90 8 91 to 150 12 151 to 280 19 281 to 500 21 501 to 1200 27 1201 to 3200 35 3201 to 10000 38 4. 2. 2. 6. 2 Forged parts weighing 250 pounds or more. Each forging weighing 250 pounds or more shal... | QQ-N-286G.PDF |
QQ-N-286G 26 dimension at the site of the imperfection. Sufficient material shall be removed to reach the bottom of the imperfection. The cross-section dimension is measured at this point. If the depth of the imperfection does not exceed the machining allowance in table XXIII for the applicable size and form, the produ... | QQ-N-286G.PDF |
QQ-N-286G 27 4. 3. 2. 3. 2 Axis of tension. The axis of tension test specimens for bar, rod, rectangles, and forged parts shall be parallel to the direction of rolling, drawing, or flow of metal. 4. 3. 2. 4 Tension test specimens of plate, sheet, and strip. Tension test specimens for plate, sheet, and strip under 0. 50... | QQ-N-286G.PDF |
QQ-N-286G 28 between the part to be inspected and the specific reference standard to be used. For longitudinal wave inspections, the attenuation check shall be based on a comparison between a back reflection obtained from similar geometrical areas on the part to be inspected and the reference standard. For shear wave i... | QQ-N-286G.PDF |
QQ-N-286G 29 the end scan procedure, still using the specified ¼ inch grid lines if their use results in an acceptable signal presentation (the 41 degree transducers typically provide enough 45 degree sound energy to perform the required inspections). A) Center scan. The catch transducer shall be placed in position R1 ... | QQ-N-286G.PDF |
QQ-N-286G 30 plus or minus 1/8 inch), shape, and material (or acoustically similar material). The hole shall be drilled to a depth of one-half the thickness or 1 inch whichever is less. Plate shall be scanned continuously on either a 24 inch grid and one diagonal on each grid, or a 12 inch grid. 4. 3. 3. 3. 1 Reference... | QQ-N-286G.PDF |
QQ-N-286G 31 finish for macroetching and be etched according to ASTM E 340. The macroetched surface shall be visually examined (unaided visual or low power, up to 10X magnification). One grain size specimen shall be taken from the coarsest grained area and one from the finest grained area of the macroetched surface. Th... | QQ-N-286G.PDF |
QQ-N-286G 32 micrometers is determined. The grain size shall be taken parallel to the fracture surface and as close to the fracture surface as practical. 4. 3. 6. 4 Fracture surface analysis. After fracture, the fracture surface of each specimen shall be examined and the fracture mode characterized as follows: 4. 3. 6.... | QQ-N-286G.PDF |
QQ-N-286G 33 4. 3. 7 Replacement, Retest, Rejection and Resubmittal. 4. 3. 7. 1 Mechanical property retests. 4. 3. 7. 1. 1 Discarded tests. If any test specimen shows defective machining or develops flaws which cause inaccurate test results it may be discarded and a replacement test specimen substituted. 4. 3. 7. 1. 2 ... | QQ-N-286G.PDF |
QQ-N-286G 34 6. 1. 4 Annealed wire Nickel-copper-aluminum alloy wire in the annealed condition is intended for severe forming, cold heading, and roll threading operations. 6. 1. 5 Spring temper wire Nickel-copper-aluminum alloy wire, spring temper in the as drawn condition is intended for coiling of helical springs whi... | QQ-N-286G.PDF |
QQ-N-286G 35 t) Packaging, packing, and marking requirements (see 5. 1). 6. 3 Certification of quality conformance. Certification of quality conformance should provide quantitative results and requirements for all specified chemical, duplex grain size, slow strain rate tensile and mechanical tests. A slow strain rate t... | QQ-N-286G.PDF |
QQ-N-286G 36 Material Specification Bound Fiber PPP-C-1120, Type III or IV, Class C Rubber, Latex Foam MIL-R-5001, Grade A Rubber, Cellular MIL-R-6130, Grade A Fibrous Glass MIL-C-17435 Polystyrene Foam MIL-P-19644, Type II Rubber Cellular Synthetic MIL-R-20092, Class 5 Polyurethane Foam MIL-P-26514 Polyurethane Foam, ... | QQ-N-286G.PDF |
QQ-N-286G 37 cool blow 1450 °F, the material should be quenched rather than be permitted to air cool below that temperature. 6. 8. 3 Heating requirements. With reference to the heating times shown herein, care must be taken to obtain the proper temperature throughout the cross-section on large diameters or thicknesses.... | QQ-N-286G.PDF |
QQ-N-286G 38 FIGURE 1. Longitudinal end scan inspection technique for large bar, rod and forgings. FIGURE 2. Shear wave pitch-catch technique for large bar, rod and forgings. Downloaded from http://www. everyspec. com | QQ-N-286G.PDF |
QQ-N-286G 39 FIGURE 3. Index marking layout for shear wave pitch-catch end scan of large bar, rod and forgings. Downloaded from http://www. everyspec. com | QQ-N-286G.PDF |
QQ-N-286G 40 FIGURE 4. Template for slow strain rate fracture test evaluation. Concentric Circles 2. 5000, 1. 5625, and 0. 9375" in diameter in a 3. 5 by 4. 5" frame. Downloaded from http://www. everyspec. com | QQ-N-286G.PDF |
QQ-N-286G 41 MILITARY INTERESTS: Custodians Army-MR Navy-SH Air Force-11 Review activities Army-AV, CR, GL Navy-OS Air Force-84, 99 DLA-IS CIVIL AGENCY COORDINATING ACTIVITIES: GSA-FSS, PCD PREPARING ACTIVITY: Navy-SH (Project 9525-N014)Downloaded from http://www. everyspec. com | QQ-N-286G.PDF |
STANDARDIZATION DOCUMENT IMPROVEMENT PROPOSAL INSTRUCTIONS 1. The preparing activity must complete blocks 1, 2, 3, and 8. In block 1, both the document number and revision letter should be given. 2. The submitter of this form must complete blocks 4,5,6, and 7 and send to preparing activity. 3. The preparing activity m... | QQ-N-286G.PDF |
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