ASTM A886/A886M-05

Standard Specification for Steel Strand, Indented, Seven-Wire Stress-Relieved for Prestressed Concrete

ABSTRACT
This specification covers seven-wire uncoated, indented, stress-relieved carbon steel strands for use in pre-stressed concrete construction. Wire dimensions, indentations, and mechanical properties shall be in accordance to the values specified in this specification. The carbon steel strand is produced to satisfy only the specified mechanical properties, this specification contains no information on the chemical composition of the wires.
SCOPE
1.1 This specification covers seven-wire uncoated, indented, stress-relieved steel strand for use in pretensioned prestressed concrete construction. Grade 250I and Grade 270I have minimum ultimate strengths of 250 ksi [1725 MPa] and 270 ksi [1860 MPa], respectively, based on the nominal area of the strand.
1.2 Supplement I describes low-relaxation strand and relaxation testing for that product. Low-relaxation strand shall be furnished when specifically ordered and furnished in place of stress-relieved strand if mutually agreed to by the purchaser and supplier.
1.3 This specification is applicable for orders in either inch-pound units (as Specification A 886) or in SI units (as Specification A 886M).
1.4 The values stated in either inch-pound units or SI units are to be regarded separately as standards. Within the text, the inch-pound units are shown in parentheses. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.

General Information

• Status: Historical
• Publication Date: 31-Aug-2005
• ICS: 77.140.15 - Steels for reinforcement of concrete
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.05 - Steel Reinforcement

Relations

• Replaces: ASTM A886/A886M-02 - Standard Specification for Steel Strand, Indented, Seven-Wire Stress-Relieved for Prestressed Concrete
• Effective Date: 01-Sep-2005
• Replaced By: ASTM A886/A886M-10 - Standard Specification for Steel Strand, Indented, Seven-Wire Stress-Relieved for Prestressed Concrete
• Effective Date: 01-Apr-2010

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: A886/A886M – 05
Standard Specification for
Steel Strand, Indented, Seven-Wire Stress-Relieved for
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Prestressed Concrete
This standard is issued under the fixed designationA886/A886M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* 2.2 U.S. Military Standards:
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MIL-STD-129 Marking for Shipment and Storage
1.1 Thisspecificationcoversseven-wireuncoated,indented,
MIL-STD-163 Steel Mill Products Preparation for Ship-
stress-relieved steel strand for use in pretensioned prestressed
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ment and Storage
concrete construction. Grade 250I and Grade 270I have mini-
2.3 U.S. Federal Standards:
mum ultimate strengths of 250 ksi [1725 MPa] and 270 ksi
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Fed. Std. No. 123 Marking for Shipments (CivilAgencies)
[1860 MPa], respectively, based on the nominal area of the
strand.
3. Terminology
1.2 Supplement I describes low-relaxation strand and relax-
3.1 Definitions of Terms Specific to This Standard:
ation testing for that product. Low-relaxation strand shall be
3.1.1 strand, n—all strand shall be of the seven-wire type
furnished when specifically ordered and furnished in place of
having a center wire enclosed tightly by six helically placed
stress-relieved strand if mutually agreed to by the purchaser
outerwireswithuniformpitchofnotlessthan12andnotmore
and supplier.
than 16 times the nominal diameter of the strand.
1.3 This specification is applicable for orders in either
inch-pound units (as Specification A886) or in SI units (as
4. Ordering Information
Specification A886M).
4.1 It shall be the responsibility of the purchaser to specify
1.4 The values stated in either inch-pound units or SI units
all requirements that are necessary for material ordered to this
are to be regarded separately as standards. Within the text, the
specification. Such requirements shall include, but are not
inch-pound units are shown in brackets. The values stated in
limited to, the following:
each system are not exact equivalents; therefore, each system
4.1.1 Quantity (meters [feet]),
must be used independently of the other. Combining values
4.1.2 Diameter of strand (millimeters [inches]),
from the two systems may result in nonconformance with the
4.1.3 Grade of strand,
specification.
4.1.4 Packaging,
2. Referenced Documents 4.1.5 ASTM designation and year of issue, and
2 4.1.6 Special requirements, if any.
2.1 ASTM Standards:
A370 Test Methods and Definitions for Mechanical Testing
NOTE 1—Atypicalorderingdescriptionisasfollows:25600m(84000
of Steel Products ft) 12.70-mm (0.5-in.), Grade 1860I (2701) strand, in 3658-m (12 000-ft)
spoolless packs to ASTM A886/A886M—_______.
E328 Test Methods for Stress Relaxation for Materials and
Structures
5. Materials and Manufacture
5.1 Base Metal—The base metal shall be carbon steel of
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This specification is under the jurisdiction ofASTM CommitteeA01 on Steel,
such quality that when it is drawn to wire, subjected to the
Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee
indentation process, fabricated into strand, and then stress-
A01.05 on Steel Reinforcement.
relieved, it shall have the properties and characteristics pre-
Current edition approved Sept. 1, 2005. Published October 2005. Originally
approved in 1988. Last previous edition approved in 2002 as A886/A886M–02.
scribed in this specification.
DOI: 10.1520/A0886_A0886M-05.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
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Standards volume information, refer to the standard’s Document Summary page on AvailablefromStandardizationDocumentsOrderDesk,Bldg.4SectionD,700
the ASTM website. Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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A886/A886M – 05
TABLE 1 Nominal Dimensions of Indentations
Wire Diameter, d Strand Diameter Depth, a Length, L Pitch, P
Fig.
mm in. mm in. mm in. mm in. mm in.
1(a) 2.6 and below [0.104 and below] 7.9 [0.312] 0.05 to 0.10 [0.002 to 0.004] 2.0 [0.079] 5.6 [0.220]
1(a) over 3.2 [over 0.125] 9.5 [0.375] 0.05 to 0.13 [0.002 to 0.005 ] 2.7 [0.108] 5.6 [0.220]
11.1 [0.438]
12.7 [0.500]
1(b) 3.2 and below [0.125 and below] 9.5 [0.375] 0.05 to 0.15 [0.002 to 0.006] 2.9 [0.115] 5.6 [0.220]
TABLE 2 Breaking Strength Requirements
5.2 Wire—The wire from which the strand is to be fabri- Diameter of Strand Mass [Weight]
Steel
Breaking Strengt
...