1、Designation: A368 95a (Reapproved 2013)Standard Specification forStainless Steel Wire Strand1This standard is issued under the fixed designation A368; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A num
2、ber in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers stainless steel wire strandcomposed of a multiplicity of round wires and suitable for useas guy wires, overhead
3、ground wires, and similar purposes.1.2 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.2. Referenced Documents2.1 ASTM Standards:2A555/A5
4、55M Specification for General Requirements forStainless Steel Wire and Wire RodsA751 Test Methods, Practices, and Terminology for Chemi-cal Analysis of Steel Products3. Ordering Information3.1 It is the responsibility of the purchaser to specify allrequirements that are necessary for material ordere
5、d under thisspecification. Such requirements may include, but are notlimited to, the following:3.1.1 Quantity (length of strand or weight of quantityordered, or both; see 13.1 and Table 1),3.1.2 Name of material (stainless steel),3.1.3 Form (wire strand in coils or on reels),3.1.4 Applicable dimensi
6、ons (for nominal strand diameter,see Table 1),3.1.5 Number of wires per strand (Table 1),3.1.6 Minimum breaking strength (medium or highstrength),3.1.7 Type designation (see Section 7),3.1.8 ASTM designation, and date of issue, and3.1.9 Special requirements, if any.NOTE 1A typical ordering descripti
7、on is as follows: 1000 ft, stainlesssteel 7-wire strand,716-in. diameter, medium strength, on reel, Type 302,ASTM A368 dated _.4. General Requirements for Delivery4.1 In addition to the requirements of this specification, allrequirements of the current edition of Specification A555/A555M shall apply
8、. Failure to comply with the generalrequirements of Specification A555/A555M constitutes non-conformance with this specification.5. Stranding5.1 Three-wire strand shall have a left lay with a uniformpitch of not less than 10 nor more than 16 times the nominaldiameter of the strand. Seven-wire strand
9、 and the outer layer of19-wire strand, shall have a left lay with a uniform pitch of notless than 12 nor more than 16 times the nominal diameter of thestrand. A left lay is defined as a counter-clockwise twist awayfrom the observer. All wires shall be stranded with uniformtension. Stranding shall be
10、 sufficiently close to ensure noappreciable reduction in diameter when stressed to 10 % of thespecified strength.5.2 All wires in the strand shall lie naturally in their truepositions in the completed strand, and when the strand is cut,the ends shall remain in position or be readily replaced by hand
11、and then remain in position. This may be accomplished by anymeans or process, such as preforming, post forming, or formsetting.6. Joints6.1 There shall be no strand joints or strand splices in anylength of the completed strand.6.2 In 3-wire strand, there shall be no joints in the individualwires.6.3
12、 In 7-wire strand, joints in individual wires shall beacceptable provided there is not more than one joint in any150-ft (46-m) section of the completed strand and the locationof each wire joint is marked on the strand with paint or someother distinguishing mark.6.4 In 19-wire strand, joints in the i
13、ndividual wires of theouter layer of 12 wires shall be acceptable provided there is notmore than one joint in any 150-ft (46-m) section and thelocation of each wire joint is marked on the strand with paint1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel an
14、d Related Alloys and is the direct responsibility of SubcommitteeA01.17 on Flat-Rolled and Wrought Stainless Steel.Current edition approved Oct. 1, 2013. Published October 2013. Originallyapproved in 1953. Last previous edition approved in 2009 as A368 95a (2009).DOI: 10.1520/A0368-95AR13.2For refer
15、enced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West
16、Conshohocken, PA 19428-2959. United States1or some other distinguishing mark. Joints in the 7-wire innerlayer of 19-wire strand shall be acceptable provided there is notmore than one joint in any 150-ft section.6.5 Joints in the individual wires shall be flash or upsetbutt-welded. Care shall be take
17、n to prevent injury to the wireduring welding.7. Chemical Composition7.1 The steel shall be Type 302, 304, 305, 316, 316Cb, or316Ti and shall conform to the requirements as to chemicalcomposition specified in Table 2.7.2 Methods and practices relating to chemical analysisrequired by this specificati
18、on shall be in accordance with TestMethods, Practices, and Terminology A751.8. Mechanical Requirements8.1 The tensile strength requirements, based upon the nomi-nal strand diameter and the number of wires in each strand,shall conform to the requirements specified in Table 1. Alltension tests shall b
19、e made upon lengths of strand that do notcontain welds in the individual wires.8.2 The individual wires of the completed strand shall notfracture when wrapped in a close helix of at least two turnsupon itself as a mandrel at a rate not exceeding 15 turns/min.9. Dimensions, Mass, and Permissible Vari
20、ations9.1 The nominal diameter of the finished strand and of theindividual wires, the number of wires per strand, and theapproximate weight per 1000 ft (or per 304.80 m) of strand areshown in Table 1.9.2 The diameter of the individual wires forming the strandshall not vary from the nominal wire diam
21、eters by more than60.001 in. (60.025 mm).10. Workmanship, Finish, and Appearance10.1 The finished strand shall be tight, smooth, and free ofimperfections not consistent with good commercial practice.10.2 The diameter of the finished strand shall be uniform,except for a minor increase in diameter due
22、 to a wire joint.11. Sampling11.1 Sampling for determination of compliance to thisspecification shall be performed on each lot of completedTABLE 1 Mechanical Properties of Stainless Steel Wire StrandNominal Diameterof Strand,in. (mm)Number of Wiresin StrandNominal Diameterof Stainless Wires, in. (mm
23、)Approximate Weight ofStrand per 1000 ft(304.80 m), lb (kg)Minimum Breaking Strength of Strand, lbf (kN)Medium Strength High Strength1364 (5.16) 3 0.093 (2.36) 72 (32.66) 3 150 (14.01) 4 500 (20.02)732 (5.56) 3 0.104 (2.64) 90 (40.82) 3 950 (17.57) 5 650 (25.13)14 (6.35) 3 0.120 (3.05) 120 (54.43) 5
24、 300 (23.58) 7 550 (33.58)516 (7.94) 3 0.145 (3.68) 175 (79.38) 7 700 (34.25) 11 000 (48.93)38 (9.52) 3 0.165 (4.19) 225 (102.06) 10 000 (44.48) 14 300 (63.61)732 (5.56) 7 0.072 (1.83) 100 (45.36) 4 500 (20.02) 6 300 (28.02)14 (6.35) 7 0.083 (2.11) 132 (59.87) 5 950 (26.47) 8 500 (37.81)932 (7.14) 7
25、 0.093 (2.36) 167 (75.75) 7 350 (32.69) 10 500 (46.71)516 (7.94) 7 0.104 (2.64) 208 (94.35) 9 200 (40.92) 13 200 (58.72)38 (9.52) 7 0.120 (3.05) 278 (126.10) 12 500 (55.60) 18 000 (80.07)716 (11.11) 7 0.145 (3.68) 405 (183.71) 18 200 (80.96) 26 000 (115.65)12 (12.70) 7 0.165 (4.19) 525 (238.14) 23 6
26、00 (104.98) 33 700 (149.90)38 (9.52) 19 0.075 (1.90) 295 (133.81) 11 800 (52.49) 16 800 (74.73)716 (11.11) 19 0.087 (2.21) 400 (181.44) 15 800 (70.28) 22 500 (100.08)12 (12.70) 19 0.100 (2.54) 530 (240.40) 21 000 (93.41) 30 000 (133.45)916 (14.29) 19 0.110 (2.79) 640 (290.30) 25 400 (112.98) 36 200
27、(161.02)58 (15.88) 19 0.125 (3.18) 825 (374.21) 33 000 (146.79) 47 000 (209.07)34 (19.05) 19 0.150 (3.81) 1,190 (539.78) 47 500 (211.29) 67 500 (300.25)78 (22.22) 19 0.175 (4.44) 1,620 (734.82) 64 000 (284.69) 91 400 (406.57)TABLE 2 Chemical RequirementsUNSDesignationTypeComposition, %Carbon,maxMang
28、a-nese,maxPhos-phorus,maxSulfur,maxSilicon,maxChromium NickelMolybdenumNitrogen,maxOther ElementsS30200 302 0.15 2.00 0.045 0.030 1.00 17.0019.00 8.0010.00 . . . 0.10 . . .S30400 304 0.08 2.00 0.045 0.030 1.00 18.0020.00 8.0010.50 . . . 0.10 . . .S30500 305 0.12 2.00 0.045 0.030 1.00 17.0019.00 10.5
29、013.00 . . . . . . . . .S31600 316 0.08 2.00 0.045 0.030 1.00 16.0018.00 10.0014.00 2.003.00 0.10 . . .S31635 316Ti 0.08 2.00 0.045 0.030 1.00 16.0018.00 10.0014.00 2.003.00 0.10 Ti 5(C+N) min,0.70 maxS31640 316Cb 0.08 2.00 0.045 0.030 1.00 16.0018.00 10.0014.00 2.003.00 0.10 (Cb+Ta) 10C min,1.10 ma
30、xA368 95a (2013)2strand. A lot shall consist of all strand of one size (nominalstrand diameter, nominal wire diameter, and number of wiresper strand) and grade in each shipment.12. Number of Tests and Retests12.1 The number of samples tested shall be as follows:Lot SizeNo. ofTestsUp to 500 ft (152 m
31、), incl 1Over 500 to 5000 ft (152 to 1524 m), incl 2Over 5000 to 10 000 ft (1524 to 3048 m), inclA3Over 10 000 ft (3048 m)A4AWhen a lot consists of only one reel, tests must be of necessity be limited to twoin number (one from each end).12.1.1 Each strand sample shall be subjected to the tensiontest
32、 as specified in 8.1.12.1.2 In addition to the strand testing specified in 12.1.1,the individual wires shall be subjected to the wrapping testspecified in 8.2. The number of individual wires to be testedfrom each strand shall be as follows:3-wire strand: test all 3 wires7-wire strand: test any 4 wir
33、es19-wire strand: test 3 wires from each layer (innerand outer layer),for a total of 6 tests12.2 In case of reasonable doubt in the first tests as to thefailure of the wire or strand to meet any requirement of thisspecification, two additional tests shall be made on samples ofwire or strand from the
34、 same coil (or reel). If failure occurs ineither of these tests, the lot shall be rejected. However, theproducer may, at his option, requalify individual coils (or reels)by performing the required tests on an individual coil (or reel)basis.13. Packaging and Marking13.1 Wire strand shall be furnished
35、 in standard lengths (see13.1.1) and in compact coils or on reels (see 13.1.2)asspecified by the purchaser; otherwise lengths shall be as agreedupon at the time of purchase.13.1.1 Standard lengths of strand are as follows: 100 ft(30.48 m), 250 ft (76.2 m), 500 ft (152.40 m), 1000 ft (304.80m), 2500
36、ft (762.00 m), and 5000 ft (1524.00 m).13.1.2 Standard practice is to furnish all strand of716 in.(11.11 mm) and over in diameter on reels in lengths of 1000 ft(304.80 m) and over. Strand lengths of less than 1000 ft areregularly furnished in coils.13.2 The strand shall be protected against damage i
37、n ordi-nary handling and shipping as agreed upon at the time ofpurchase. Each coil (or reel) shall have a strong weather-prooftag securely fastened to it showing the minimum breakingstrength, the nominal diameter of the strand, the length of thestrand, the steel type designation, ASTM Designation A3
38、68dated _, and the name or mark of the manufacturer.14. Keywords14.1 stainless steel; wire strandASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determi
39、nation of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or wi
40、thdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that y
41、our comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (si
42、ngle or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).A368 95a (2013)3
