1、MIL-W- 19487A(OS) 24 June 1975 SUPERSEDING 14 May 1956 and Amendment 1 6 September 1957 MIL-W-l9487(NORD) MILITARY SPECIFLCATION WIRE, NICKEL-BASE ALLOY, AGE HARDENABLE This specification is approved for use by all departments and agencies of the Department of Defense 1. SCOPE 1.1 Scope- This specif
2、ication covers two grades of nickel-base alloy wire for coil spring applications requiring high strength and resistance to corrosion. 1.2 Classification. Nickel-base alloy wire shall be of the following grades, and conditions, as specified (see 6.2). Grade A - Nickel-aluminum-titanium alloy Grade B
3、- Nickel-titanium-magnesium alloy Condition 1 - Spring temper, ac-drawn a. Grade A wire see 1.3.2) which has been given a final reduc- tion of 60 to 70 percent after the final process anneal at 1600“ to 1800 Fahrenheit CF) . b. Grade B wire (see 1.3-2) which has been given a final reduc- tion of 60
4、to 70 percent after the final process anneal, The final process anneal shall consist of a treatment response to subsequent age hardening; where practical and far large sizes, water quenching shall be used. Condition 2 - Spring temper, age-hardened a. condition 1 and subsequently aged (see note 6.3).
5、 Grade A or grade B wire which has been processed as desired for Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-W- 19487A(OS) 1.3 Fabrication. 1.3.1 Unless otherwise specified base alloy wire shall be furnished and subsequent age hardening by th
6、e in the contract or order, nickel- n cond tion 1 suitable for coiling f ab ri cat or . . 13.2 Nickel-base alloy wire shall be cold-drawn from hot finished wire or rod which has been previously ground or processed for the removal of seams, cracks, or other injurious surface defects. 2, APPLICABLE DO
7、CUMENTS 2.1 The following documents of the issue in effect on date of invita- In the event of conflict between this tion for bids or request for proposal form a part of this specification to the extent specified herein. specification and other documents referenced herein, requirements of this specif
8、ication shall apply, STANDARDS Mi lit ary MIL-STD- 105 Sampling Procedures and Tab le for Inspection by Attribut es MIL-STD- 129 Marking for Shipment and Storage MIL-STD- 163 Steel Mill Products, Preparation for Shipment and Storage (Copies of specifications, standards, drawings, and publications re
9、quired by contractors in connection with specific procurement functions should be obtained from the procuring activity or as directed by the con- tracting officer.) 3. REQUIREMENTS 3.1 Material. 3.1.1 The material used shall be such as to produce nickel-base alloy wire in full compliance with the ch
10、emical and mechanical requirements of this specification, 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-W-L747A 75 7777906 OLL7364 3 = MIL-W- 19487A(OS) 3.1.2 Macroscopic. The wire shall be uniform in quality and condi- tion. shall disclose t
11、he wire to be clean, sound, smooth, and free from foreign material, pipes, slivers, laps, cracks, welds, twists, kinks, seams, scale, damaged ends or edges, buckles, or other defects injurious to the normal performance of a spring. Visual examination of samples after deep acid etch (see 4.3.3) 3.2 C
12、hemical comrosition. Chemical composition of the material is given in table I (see 6.4). An ana furnished by the contractor showing des i gnat ed . T ysis of each lot of wire shall be the percentages of each element ble I CHEMICAL COMPOSITION (%) E lemen t s Nickel, minimum Aluminum Carbon (total),
13、maximum I ron, maximum Manganes e, maximum Silicon, maximum Titanium Sulfur, maximum Copper, maximum Magnesium lNicke1 including cobalt. Grade A 93.0 O. 30 O .60 0.50 1.0 0.25 - 1-00 0,010 0.25 4.0 - 4.75 Grade B 97.0 O .40 O .60 0.50 o, 35 0.20 - 0.60 o ,010 0.25 0.20 - 0.50 - 3.3 Mechanical proper
14、ties, Mechanical properties shall be as shown in table II. 3.3.1 Response to ageing treatment. Grades A and B material ordered in the unaged condition (condition 1) shall be demonstrated to be capable of meeting the mechanical properties of the corresponding heattreated condition (condition 2) shown
15、 in table II. 3.4 Wrapping. 3.4.1 Condition 1. Wire of condition 1 up to 0.229 inch diameter, inclusive, shall withstand wrapping, eight consecutive close wound turns 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Provided by IHSNot for ResaleNo r
16、eproduction or networking permitted without license from IHS-,-,-MIL-W-L787A 75 7777706 Table III TOLERANCES IN DIAMETER OF COLD-DR WI MIL- W- 19487A(OS) WIRE. GRADES -A AND B Specified di amet er Tolerances (inch) (in ch) To 0.0044, inclusive Over 0.0044 to 0.0079, inclusive Over 0.0079 to 0.0149,
17、inclusive Over 0.0149 to 0.0199, inclusive Over 0.0199 to 0.031, inclusive Over 0.031 to 0.045, inclusive Over 0,045 to 0,079, inclusive Over 0,079 to 0.1875, inclusive Over 0.1875 to 0.312, inclusive +0.0002 fO ,00025 IO .O003 +O ,0004 +O ,0005 +OI 0006 +O. 0007 +0,001 + 0.001, -0,002 4. QUALITY AS
18、SURANCE PROVISION 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the supplier is responsible for the perfor- mance of all inspection requirements as specified herein. otherwise Specified in the contract or order, the supplier may use his own or any o
19、ther facilities suitable for the perormance of the incpec- tion requirements specified herein, unless disapproved by the Government, The Government reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies and s
20、ervices conform to prescribed requirements. Except as 4.1.1 Lot, - 4.1.1.1 For visual inspection and mechanical tests. Unless otherwise specified in the contract or order, a lot shall consist of material of one grade, condition, and size offered for delivery at one time, 4.1.2 For chemical analysis.
21、 A lot shall consist of not more than 5000 pounds of material from one melt offered for delivery at one time. Where material cannot be identified by melt, a lot shall consist of not more than 500 pounds of material of one grade, condition, and size offered for delivery at one time. 5 Provided by IHS
22、Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL- W- 19 4 8 7A (OS) 4.2 Sampling for Government analysis. Samples shall be obtained from each lot as defined in 4.1.2. The samples shall be selected in a manner calculated to disclose any nonuniformity of material
23、within the lot. The samples selected shall consist of not less than 2 ounces of chips or wire clippings, for Government analysis may be taken from the final starting size prior to the final reduction to finished size, to a Government laboratory designated by the procuring activity, For fine size wir
24、es 0.032 inch in diameter and less, samples The samples shall be forwarded 4.3 Visual and dimensional inspection. 4.3.1 Sam lin , From each lot as defined in 4.1.1, representative characteristics with sample size and acceptance criteria determined in accordance with MIL-STD-105, inspection level II,
25、 AQL 1.0 percent, unless otherwise specified by the procuring activity. samples shall -%+ e selected for inspection of visual and dimensional 4.3.2 Each sample selected in accordance with 4.3.1 shall be subjected to surface inspection for workmanship and dimensions. containing one or more visual or
26、dimensional defects shall be rejected, and if the number of defective units in any sample exceeds the acceptance number for that sample, the lot represented by the sample shall be rejected, A rejected lot may be resubmitted for Government inspection provided the manufacturer, after having been infor
27、med of the reasons for rejection, has inspected each unit in the lot for the deficiency noted and has removed, reworked, or repaired all nonconforming units. Any sample unit 4.33 Macroscopic. Macroscopic tests shall be made in full sections of the wire in the as-received condition, samples not less
28、than 3 inches long, taken from each end of each coil of wire. polished, by volume, of nitric acid (specific gravity 1.42) and 3 parts, by volume of hydrochloric acid (specific gravity 1.19). Etch at 95 to 100 F for 5 to 10 minutes, Tests shall be performed on The ends of the sample shall be square-c
29、ut and fine-ground or The etching solution shall be aqua regia composed of one part, Inspection by a 1OX magnifier will be permitted. 4.4 Sampling for mechanical tests, Samples for mechanical tests shall be selected in accordance with table IV, 6 Provided by IHSNot for ResaleNo reproduction or netwo
30、rking permitted without license from IHS-,-,-MIL-W-3747A 75 m 777790b 0337368 O m Table IV SAMPLING FOR MECHANICAL TESTS Tension tests Macro and wrap tests No. of Maximum No. of No. of Maximum No, of samples failures allowed samples failures allowed Lot size Where material can be identified by melt
31、Sample size and acceptance criteria shall be determined in accor- dance with MIL-STD-105, inspection level L-4, AQL 4.0 percent. sizes shall be based on the number of pounds per lot. Lot Condition 2 wire 5000 lb and less Il I o l- I- Where material cannot be identified by melt Condition 1 wire Indiv
32、idual coils Condition 2 wire Individual coils 4.4.1 Tension. wran. and macroscooic tests. 4.4.1.1 Where material can be identified by melt. Unless otherwise specified in the contract or order, tension, wrap, and macroscopic specimens shall be selected as indicated in table IV, 4.4.1.2 Where material
33、 cannot be identified by melt. One tension, one wrap, and one macroscopic specimen shall be selected from individual coils of wire as indic-ated in table IV. 4.4.2 Response to age-hardening treatment. One tension test specimen shall be selected from each coil of condition 1 wire in a lot as defined
34、in table IV for proof of ability to respond to ageing heat treatment in agreement with the requirements of table II. The ageing temperatures are those noted in 6.3. 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MI L-W- 19 4 8 7A (OS) 4.4.3 Reject
35、ion, If any sample fails to comply with the associated acceptance criteria, the lot represented shall be rejected. Rejected lots may be permitted a maximum of one resubmission subsequent to the manufacturers removal or reworking of all defective material in the lot. 4.5 Mechanical tests. 4.5,1 Tensi
36、on. Tension test specimens shall be of the full cross section of wire and not less than 15 inches in length. shall be free from sharp bends or kinks. jaws of the testing machine with the specimen in place ready for test- ing shall be not less than 10 inches. Specimens The distance between the 4.5.2
37、B. of a suitable length, indicated in 3.4, and examined for cracks. Wrap test specimens shall be full-size sections of wire The specimens shall be wrapped around a rod, as 5, PREPARATION FOR DELIVERY 5.1 Packing. 5.1.1 Level A. The subject commodity shall be packaged, packed, and identified, in the
38、same manner as specified for comparable stainless steel products, in accordance with MIL-STD-163, except that no protective coatings are required. Packing shall be level A or C as specified (see 6.2). 5,1.2 Level C, The subject commodity shall be prepared for shipment in accordance with commercial p
39、ractice to insure carrier acceptance and cafe delivery at destination and shall meet, as a minimum, the require- ments of carrier rules and regulations applicable to the mode of trans- portation. 5.2 Marking. In addition to any special marking required by the contract or order, shipping containers s
40、hall be marked in accordance with MIL-STD-129, Nomenclature shall be the exact nomenclature for the part or items that have been approved under the contract or order. 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-flIL-W-39487A 75 = 797790b 033737
41、0 9 MIL-W- 19487A(OS) 6. NOTES 6.1 Intended use. 6.1.1 Nickel-base alloy, grades A and B, are u$ed for the same mechani- cal purposes; grade B material has special qualities for electrical ser- vice, 6.1.2 Nickel-base alloy wire, grades A and B, condition 1, is intended for coiling of helical spring
42、s which are to be age-hardened after coiling in order to obtain maximum strength and hardness. are to be cold pressed, the cold pressing shall be done after coiling and ageing. Where helical springs 6.2 Ordering data. Procurement documents should specify the following: a. Title, number, and date of
43、this specification b. Grade and condition c. Size required (see applicable table) d. Whether wrap-testing of condition 2 wire is required (see 3.4.2) e. f. Lot definition, if other than 4.1.1 g. Laboratory to receive samples for Government analysis (see 4.2) h. If tolerances other than those shown a
44、re required (see 3.5) Sampling for visual and dimensional inspection, if other than 4.3.1 i. Level of packing required (see 5.1). 6.3 Age-hardenne treatment. 6.3.1 Grade A (Duranickel). Age-harden 8 hours at 9801 15 F in sulfur free dry hydrogen or dissociated ammonia. 6 hours minimum. Cool in furna
45、ce for 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-6,3.2 Grade B (Permanickel). Age-harden 8 hours at 910 f lSo F in sulfur free dry hydrogen or dissociated ammonia. Cool in air. 6.4 Availability. Nickel-base alloy wire is commercially availabl
46、e in the conditions and in the nominal ranges and increments of sizes as shown in table I. subject to change. information available. The data given in this table are informative only and The manufacturer should be consulted for latest Custodian : Preparing activity: Navy - OS Navy - OS (Project No. 9525-N004) * U. S. GOVERNMENT PRINTING OFFICE: 1975 -603-7W0226 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
