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

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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.

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09-Sep-2002
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ASTM A886/A886M-02 - Standard Specification for Steel Strand, Indented, Seven-Wire Stress-Relieved for Prestressed Concrete
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: A 886/A 886M – 02
Standard Specification for
Steel Strand, Indented, Seven-Wire Stress-Relieved for
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Prestressed Concrete
ThisstandardisissuedunderthefixeddesignationA886/A886M;thenumberimmediatelyfollowingthedesignationindicatestheyear
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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope* 2.3 U.S. Federal Standards:
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Fed. Std. No. 123 Marking for Shipments (CivilAgencies)
1.1 Thisspecificationcoversseven-wireuncoated,indented,
stress-relieved steel strand for use in pretensioned prestressed
3. Terminology
concrete construction. Grade 250I and Grade 270I have mini-
3.1 Definitions of Terms Specific to This Standard:
mum ultimate strengths of 250 ksi [1725 MPa] and 270 ksi
3.1.1 strand, n—all strand shall be of the seven-wire type
[1860 MPa], respectively, based on the nominal area of the
having a center wire enclosed tightly by six helically placed
strand.
outerwireswithuniformpitchofnotlessthan12andnotmore
1.2 Supplement I describes low-relaxation strand and relax-
than 16 times the nominal diameter of the strand.
ation testing for that product. Low-relaxation strand shall be
furnished when specifically ordered and furnished in place of
4. Ordering Information
stress-relieved strand if mutually agreed to by the purchaser
4.1 Orders for seven-wire stress-relieved strand under this
and supplier.
specification should include the following information:
1.3 This specification is applicable for orders in either
4.1.1 Quantity (meters [feet]),
inch-pound units (as Specification A886) or in SI units (as
4.1.2 Diameter of strand (millimeters [inches]),
Specification A886M).
4.1.3 Grade of strand,
1.4 The values stated in either inch-pound units or SI units
4.1.4 Packaging,
are to be regarded separately as standards. Within the text, the
4.1.5 ASTM designation and year of issue, and
inch-pound units are shown in parentheses. The values stated
4.1.6 Special requirements, if any.
in each system are not exact equivalents; therefore, each
system must be used independently of the other. Combining
NOTE 1—Atypicalorderingdescriptionisasfollows:25600m(84000
values from the two systems may result in nonconformance ft) 12.70-mm (0.5-in.), Grade 1860I (2701) strand, in 3658-m (12 000-ft)
spoolless packs to ASTM A886/A886M—_______.
with the specification.
5. Materials and Manufacture
2. Referenced Documents
5.1 Base Metal—The base metal shall be carbon steel of
2.1 ASTM Standards:
such quality that when it is drawn to wire, subjected to the
A370 TestMethodsandDefinitionsforMechanicalTesting
2
indentation process, fabricated into strand, and then stress-
of Steel Products
relieved, it shall have the properties and characteristics pre-
E328 MethodsforStressRelaxationTestsforMaterialsand
3
scribed in this specification.
Structures
5.2 Wire—The wire from which the strand is to be fabri-
2.2 U.S. Military Standards:
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cated shall have a common dry-drawn finish.
MIL-STD-129 Marking for Shipment and Storage
MIL-STD-163 Steel Mill Products Preparation for Ship-
NOTE 2—Thisproductisacompositeofsevenwiresandisproducedto
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ment and Storage
mechanical properties only, the chemistry of all wires or any individual
wireisnotpertinenttothisapplication,andheatidentityisnotnecessarily
maintained. It is possible that wire from more than one heat may be used
1
This specification is under the jurisdiction ofASTM CommitteeA01 on Steel,
inthemanufactureofareelorpack.Traceabilityisbasedonpackidentity
Stainless Steel, and RelatedAlloys and is the direct responsibility of Subcommittee
as maintained and reported by the manufacturer.
A01.05 on Steel Reinforcement.
5.3 Indentations—The outer wires shall have indentations
Current edition approved Sept. 10, 2002. Published June 2003. Originally
approve in 1988. Last previous edition approved in 1999 as A886/A886M–99.
designed to reduce longitudinal movement of the strand within
2
Annual Book of ASTM Standards, Vol 01.03.
the concrete, and conform to the provisions in Section7. The
3
Annual Book of ASTM Standards, Vol 03.01.
4
AvailablefromStandardizationDocumentsOrderDesk,Bldg.4SectionD,700
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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A 886/A 886M – 02
TABLE 2 Breaking Strength Requirements
surface of the outer wires shall be suitably deformed mechani-
cally by rolling to produce a series of indentations. Indenta- Diameter of Strand Mass [Weight]
Steel
Breaking Strength of Strand,
tionsshallbeintwoormorelinesspac
...

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