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ASTM A368-95a(2009)

(Specification)

Standard Specification for Stainless Steel Wire Strand

Standard Specification for Stainless Steel Wire Strand

ABSTRACT
This specification covers the standard for stainless steel wire strand composed of a multiplicity of round wires and suitable for use as guy wires, overhead ground wires, and similar purposes. Stranding shall be sufficiently close to ensure no appreciable reduction in diameter when stressed to the specified strength. Several types of steel are covered like Type 302, 304, 305, 316, 316Cb, or 316Ti and shall conform to the required chemical composition values in carbon, manganese, phosphorus, sulfur, silicon, chromium, nickel, molybdenum, and nitrogen. The tensile strength, based upon the nominal strand diameter and the number of wires in each strand, shall conform to the minimum values in breaking strength. The individual wires of the completed strand shall not fracture when wrapped in a close helix of at least two turns upon itself as a mandrel.
SCOPE
1.1 This specification covers stainless steel wire strand composed of a multiplicity of round wires and suitable for use as guy wires, overhead ground wires, and similar purposes.  
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

General Information

Status
Historical
Publication Date
30-Apr-2009
ICS
29.060.10 - Wires
Technical Committee
A01 - Steel, Stainless Steel and Related Alloys
Drafting Committee
A01.17 - Flat-Rolled and Wrought Stainless Steel
Current Stage
Ref Project

Relations

Replaces
ASTM A368-95a(2004) - Standard Specification for Stainless Steel Wire Strand
Effective Date
01-May-2009
Replaced By
ASTM A368-95a(2013) - Standard Specification for Stainless Steel Wire Strand
Effective Date
01-Oct-2013
Referred By
ASTM A555/A555M-23 - Standard Specification for General Requirements for Stainless Steel Wire and Wire Rods
Effective Date
01-May-2009

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ASTM A368-95a(2009) - Standard Specification for Stainless Steel Wire StrandASTM A368-95a(2009) - Standard Specification for Stainless Steel Wire Strand
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ASTM A368-95a(2009) - Standard Specification for Stainless Steel Wire Strand
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:A368 −95a(Reapproved 2009)
Standard Specification for
Stainless Steel Wire Strand
This standard is issued under the fixed designation A368; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
NOTE 1—Atypical ordering description is as follows: 1000 ft, stainless
1. Scope
steel 7-wire strand, ⁄16-in. diameter, medium strength, on reel, Type 302,
1.1 This specification covers stainless steel wire strand
ASTM A368 dated _____.
composed of a multiplicity of round wires and suitable for use
as guy wires, overhead ground wires, and similar purposes. 4. General Requirements for Delivery
4.1 In addition to the requirements of this specification, all
1.2 The values stated in inch-pound units are to be regarded
as standard. The values given in parentheses are mathematical requirements of the current edition of Specification A555/
A555M shall apply. Failure to comply with the general
conversions to SI units that are provided for information only
and are not considered standard. requirements of Specification A555/A555M constitutes non-
conformance with this specification.
2. Referenced Documents
5. Stranding
2.1 ASTM Standards:
5.1 Three-wire strand shall have a left lay with a uniform
A555/A555M Specification for General Requirements for
pitch of not less than 10 nor more than 16 times the nominal
Stainless Steel Wire and Wire Rods
diameter of the strand. Seven-wire strand and the outer layer of
A751 Test Methods, Practices, and Terminology for Chemi-
19-wire strand, shall have a left lay with a uniform pitch of not
cal Analysis of Steel Products
lessthan12normorethan16timesthenominaldiameterofthe
strand. A left lay is defined as a counter-clockwise twist away
3. Ordering Information
from the observer. All wires shall be stranded with uniform
3.1 It is the responsibility of the purchaser to specify all
tension. Stranding shall be sufficiently close to ensure no
requirements that are necessary for material ordered under this
appreciable reduction in diameter when stressed to 10 % of the
specification. Such requirements may include, but are not
specified strength.
limited to, the following:
5.2 All wires in the strand shall lie naturally in their true
3.1.1 Quantity (length of strand or weight of quantity
positions in the completed strand, and when the strand is cut,
ordered, or both; see 13.1 and Table 1),
the ends shall remain in position or be readily replaced by hand
3.1.2 Name of material (stainless steel),
and then remain in position. This may be accomplished by any
3.1.3 Form (wire strand in coils or on reels),
means or process, such as preforming, post forming, or form
3.1.4 Applicable dimensions (for nominal strand diameter,
setting.
see Table 1),
3.1.5 Number of wires per strand (Table 1),
6. Joints
3.1.6 Minimum breaking strength (medium or high
strength), 6.1 There shall be no strand joints or strand splices in any
3.1.7 Type designation (see Section 7),
length of the completed strand.
3.1.8 ASTM designation, and date of issue, and
6.2 In3-wirestrand,thereshallbenojointsintheindividual
3.1.9 Special requirements, if any.
wires.
6.3 In 7-wire strand, joints in individual wires shall be
acceptable provided there is not more than one joint in any
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
150-ft (46-m) section of the completed strand and the location
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
A01.17 on Flat-Rolled and Wrought Stainless Steel.
of each wire joint is marked on the strand with paint or some
Current edition approved May 1, 2009. Published May 2009. Originally
other distinguishing mark.
approved in 1953. Last previous edition approved in 2004 as A368 – 95a (2004).
DOI: 10.1520/A0368-95AR09.
6.4 In 19-wire strand, joints in the individual wires of the
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
outer layer of 12 wires shall be acceptable provided there is not
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
more than one joint in any 150-ft (46-m) section and the
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. location of each wire joint is marked on the strand with paint
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
A368−95a (2009)
TABLE 1 Mechanical Properties of Stainless Steel Wire Strand
Nominal Diameter Approximate Weight of Minimum Breaking Strength of Strand, lbf (kN)
Number of Wires Nominal Diameter
of Strand, Strand per 1000 ft
Medium Strength High Strength
in Strand of Stainless Wires, in. (mm)
in. (mm) (304.80 m), lb (kg)
⁄64 (5.16) 3 0.093 (2.36) 72 (32.66) 3 150 (14.01) 4 500 (20.02)
⁄32 (5.56) 3 0.104 (2.64) 90 (40.82) 3 950 (17.57) 5 650 (25.13)
⁄4 (6.35) 3 0.120 (3.05) 120 (54.43) 5 300 (23.58) 7 550 (33.58)
⁄16 (7.94) 3 0.145 (3.68) 175 (79.38) 7 700 (34.25) 11 000 (48.93)
⁄8 (9.52) 3 0.165 (4.19) 225 (102.06) 10 000 (44.48) 14 300 (63.61)
⁄32 (5.56) 7 0.072 (1.83) 100 (45.36) 4 500 (20.02) 6 300 (28.02)
⁄4 (6.35) 7 0.083 (2.11) 132 (59.87) 5 950 (26.47) 8 500 (37.81)
⁄32 (7.14) 7 0.093 (2.36) 167 (75.75) 7 350 (32.69) 10 500 (46.71)
⁄16 (7.94) 7 0.104 (2.64) 208 (94.35) 9 200 (40.92) 13 200 (58.72)
⁄8 (9.52) 7 0.120 (3.05) 278 (126.10) 12 500 (55.60) 18 000 (80.07)
⁄16 (11.11) 7 0.145 (3.68) 405 (183.71) 18 200 (80.96) 26 000 (115.65)
⁄2 (12.70) 7 0.165 (4.19) 525 (238.14) 23 600 (104.98) 33 700 (149.90)
⁄8 (9.52) 19 0.075 (1.90) 295 (133.81) 11 800 (52.49) 16 800 (74.73)
⁄16 (11.11) 19 0.087 (2.21) 400 (181.44) 15 800 (70.28) 22 500 (100.08)
⁄2 (12.70) 19 0.100 (2.54) 530 (240.40) 21 000 (93.41) 30 000 (133.45)
⁄16 (14.29) 19 0.110 (2.79) 640 (290.30) 25 400 (112.98) 36 200 (161.02)
⁄8 (15.88) 19 0.125 (3.18) 825 (374.21) 33 000 (146.79) 47 000 (209.07)
⁄4 (19.05) 19 0.150 (3.81) 1,190 (539.78) 47 500 (211.29) 67 500 (300.25)
⁄8 (22.22) 19 0.175 (4.44) 1,620 (734.82) 64 000 (284.69) 91 400 (406.57)
or some other distinguishing mark. Joints in the 7-wire inner 8.2 The individual wires of the completed stra
...

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1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.2.1 Exceptions—For conductor sizes designated by AWG or kcmil sizes, the requirements in SI units are numerically converted from the corresponding requirements in inch-pound units. For conductor sizes designated by SI units only, the requirements are stated or derived in SI units. For density, resistivity, and temperature, the values stated in SI units are to be regarded as standard.  
1.3 ACSS/TW is designed to increase the aluminum area for a given diameter of conductor by the use of trapezoidal shaped wires (TW), or to reduce the diameter for a given area of aluminum. The conductors consist of a central core of round steel wire(s) surrounded by two or more layers of trapezoidal aluminum 1350-0 wires. Different strandings of the same size of conductor are identified by type, which is the approximate ratio of steel area to aluminum area expressed in percent (see Table 1, Table 2 and Table 3). For the purpose of this specification, the sizes listed in Table 1 and Table 2 are tabulated on the basis of the finished conductor having an area or outside diameter equal to that of specified sizes of standard ACSR, ACSS, and ACSR/TW so as to facilitate conductor selection.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

  • Technical specification
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    English language
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  • Technical specification
    7 pages
    English language
    sale 15% off