1、Designation: A 368 95a (Reapproved 2009)Standard Specification forStainless Steel Wire Strand1This standard is issued under the fixed designation A 368; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A n
2、umber 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, overhea
3、d 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:2A 555
4、/A 555M Specification for General Requirements forStainless Steel Wire and Wire RodsA 751 Test Methods, Practices, and Terminology forChemical Analysis of Steel Products3. Ordering Information3.1 It is the responsibility of the purchaser to specify allrequirements that are necessary for material ord
5、ered 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 dime
6、nsions (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 descri
7、ption is as follows: 1000 ft, stainlesssteel 7-wire strand,716-in. diameter, medium strength, on reel, Type 302,ASTM A 368 dated _.4. General Requirements for Delivery4.1 In addition to the requirements of this specification, allrequirements of the current edition of Specification A 555/A 555M shall
8、 apply. Failure to comply with the generalrequirements of Specification A 555/A 555M 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-wir
9、e strand 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
10、shall be 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
11、 by handand 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 individualw
12、ires.6.3 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
13、in the individual 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
14、Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.17 on Flat-Rolled and Wrought Stainless Steel.Current edition approved May 1, 2009. Published May 2009. Originallyapproved in 1953. Last previous edition approved in 2004 as A 368 95a (2004).2For referenced ASTM standards,
15、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.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 1942
16、8-2959, United States.or 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 taken to prevent injury t
17、o 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 specification shall be in accord
18、ance with TestMethods, Practices, and Terminology A 751.8. 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 be made upon lengths
19、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 Variations9.1 The nomina
20、l 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 diameters by more than60
21、.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 to a wire joint.11.
22、 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)Approximate Weight
23、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) 5 300 (23.58) 7 550 (
24、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 0.093 (2.36) 167 (7
25、5.75) 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) 23 600 (104.98) 33 700 (
26、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 (161.02)58 (15.88) 1
27、9 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,maxManga-nese,maxPhos-phoru
28、s,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 10.5013.00 . . . . . . .
29、 . .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 53(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) 103C min,1.10 maxA 368 95a (2009)2
30、strand. 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), incl 1Over 500
31、 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 totwo in number (one from each end).12.1.1 Each strand sample shall be subjected to the tensiontest as specified in
32、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 wires19-wire strand:
33、 test 3 wires from each layer (inner and 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 same coil (or r
34、eel). 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 in standard len
35、gths (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 ft (762.00 m), a
36、nd 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 in ordi-nary hand
37、ling 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 A 368dated _, and
38、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 determination of the v
39、alidity 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 withdrawn. Your c
40、omments 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 your comments ha
41、ve 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 (single 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).A 368 95a (2009)3
