ASTM A368-95a(2013)
(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
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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 2013)
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 Oct. 1, 2013. Published October 2013. Originally
other distinguishing mark.
approved in 1953. Last previous edition approved in 2009 as A368 – 95a (2009).
DOI: 10.1520/A0368-95AR13.
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
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A368−95a (2013)
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 strand shall not
layerof19-wirestrands
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