ASTM A886/A886M-16

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 two types and two grades of indented seven-wire uncoated, steel strand for use in prestressed concrete construction. The two types of strand are low-relaxation and stress-relieved (normal-relaxation). Grade 250I [1725I] and Grade 270I [1860I] have minimum tensile strengths of 250 ksi [1725 MPa] and 270 ksi [1860 MPa], respectively, based on the nominal area of the strand.  
1.2 This specification is applicable for orders in either inch-pound units (as Specification A886) or in SI units (as Specification A886M).  
1.3 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the specification.

General Information

• Status: Historical
• Publication Date: 30-Nov-2016
• 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-12 - Standard Specification for Steel Strand, Indented, Seven-Wire Stress-Relieved for Prestressed Concrete
• Effective Date: 01-Dec-2016

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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 −16
Standard Specification for
Steel Strand, Indented, Seven-Wire Stress-Relieved for
1
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* 3.1.1 strand, n—a group of wires having a center wire
enclosed tightly by six helically placed outer wires with
1.1 This specification covers two types and two grades of
uniform pitch of not less than 12 and not more than 16 times
indented seven-wire uncoated, steel strand for use in pre-
the nominal diameter of the strand.
stressed concrete construction. The two types of strand are
3.1.1.1 Discussion—The direction of lay is either right-
low-relaxation and stress-relieved (normal-relaxation). Grade
handed or left-handed.
250I [1725I] and Grade 270I [1860I] have minimum tensile
strengths of 250 ksi [1725 MPa] and 270 ksi [1860 MPa],
4. Ordering Information
respectively, based on the nominal area of the strand.
4.1 It shall be the responsibility of the purchaser to specify
1.2 This specification is applicable for orders in either
all requirements that are necessary for material ordered under
inch-pound units (as Specification A886) or in SI units (as
this specification. Such requirements to be considered include,
Specification A886M).
but are not limited to, the following:
1.3 The values stated in either inch-pound units or SI units
4.1.1 Quantity (feet [metres]),
are to be regarded separately as standard. Within the text, the
4.1.2 Nominal diameter of strand (inches [millimetres]),
SI units are shown in brackets. The values stated in each
4.1.3 Grade of strand,
system are not exact equivalents; therefore, each system shall
4.1.4 Type of strand (low-relaxation or stress-relieved
beusedindependentlyoftheother.Combiningvaluesfromthe
(normal-relaxation)),
two systems may result in non-conformance with the specifi-
4.1.5 Other types of indented wire (7.4.2),
cation.
4.1.6 If joints or splices are permitted (8.1.1),
4.1.7 Weldless, if desired (8.1.4),
2. Referenced Documents
4.1.8 Inspection (11.1),
2
2.1 ASTM Standard:
4.1.9 Load-elongation curve, if desired (13.2),
A1061/A1061MTest Methods for Testing Multi-Wire Steel
4.1.10 Packaging (4.1), and
Prestressing Strand
4.1.11 ASTM designation and year of issue.
2.2 U.S. Military Standard:
3
MIL-STD-129Marking for Shipment and Storage
5. Materials and Manufacture
2.3 U.S. Federal Standard:
3
5.1 Base Metal—The base metal shall be carbon steel of
Fed. Std. No. 123Marking for Shipments (CivilAgencies)
such quality that when it is drawn to wire, subjected to the
3. Terminology
indentation process, fabricated into strand, and then thermally
treated, it shall have the properties and characteristics pre-
3.1 Definition of Term Specific to this Specification:
scribed in this specification.
5.2 Wire—Thewirefromwhichthestrandistobefabricated
1
This specification is under the jurisdiction ofASTM Committee A01 on Steel,
Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee shall have a common dry-drawn finish.
A01.05 on Steel Reinforcement.
NOTE1—Thisproductisacompositeofsevenwiresandisproducedto
Current edition approved Dec. 1, 2016. Published January 2017. Originally
only the prescribed mechanical properties. The chemical composition of
approved in 1988. Last previous edition approved in 2012 as A886/A886M–12.
all wires or any individual wire is not pertinent to this application, and
DOI: 10.1520/A0886_A0886M-16.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or heat identity is not necessarily maintained. It is possible that wire from
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM more than one heat may be used in the manufacture of a reel or reelless
Standards volume information, refer to the standard’s Document Summary page on
pack. Traceability is based on the identity of reels or reelless packs as
the ASTM website.
maintained and reported by the manufacturer.
3
AvailablefromU.S.GovernmentPrintingOfficeSuperintendentofDocuments,
5.3 Indentations—The outer wires shall have indentations
732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http://
www.access.gpo.gov. that inhibit longitudinal movement of the strand relative to the
*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
1

---------------------- Page: 1 ----------------------
A886/A886M−16
TABLE 1 Nominal Dimensions of Indentations
Wire Diameter, d No
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: A886/A886M − 12 A886/A886M − 16
Standard Specification for
Steel Strand, Indented, Seven-Wire Stress-Relieved for
1
Prestressed Concrete
This standard is issued under the fixed designation A886/A886M; 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.
1. Scope*
1.1 This specification covers two types and two grades of indented seven-wire uncoated, steel strand for use in prestressed
concrete construction. The two types of strand are low-relaxation and stress-relieved (normal-relaxation). Grade 250I [1725I] and
Grade 270I [1860I] have minimum tensile strengths of 250 ksi [1725 MPa] and 270 ksi [1860 MPa], respectively, based on the
nominal area of the strand.
1.2 This specification is applicable for orders in either inch-pound units (as Specification A886) or in SI units (as Specification
A886M).
1.3 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units
are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system shall be used
independently of the other. Combining values from the two systems may result in non-conformance with the specification.
2. Referenced Documents
2
2.1 ASTM Standard:
A1061/A1061M Test Methods for Testing Multi-Wire Steel Prestressing Strand
2.2 U.S. Military Standard:
3
MIL-STD-129 Marking for Shipment and Storage
2.3 U.S. Federal Standard:
3
Fed. Std. No. 123 Marking for Shipments (Civil Agencies)
3. Terminology
3.1 Definition of Term Specific to this Specification:
3.1.1 strand, n—a group of wires having a center wire enclosed tightly by six helically placed outer wires with uniform pitch
of not less than 12 and not more than 16 times the nominal diameter of the strand.
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.05
on Steel Reinforcement.
Current edition approved Nov. 15, 2012Dec. 1, 2016. Published December 2012January 2017. Originally approved in 1988. Last previous edition approved in 20102012
as A886/A886M – 10.A886/A886M – 12. DOI: 10.1520/A0886_A0886M-12.10.1520/A0886_A0886M-16.
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 Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from U.S. Government Printing Office Superintendent of Documents, 732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http://
www.access.gpo.gov.
3.1.1.1 Discussion—
The direction of lay may be is either right- or left-hand; however, strands of different lays should not be spliced
together.right-handed or left-handed.
4. Ordering Information
4.1 It shall be the responsibility of the purchaser to specify all requirements that are necessary for material ordered under this
specification. Such requirements to be considered include, but are not limited to, the following:
4.1.1 Quantity (feet [metres]),
4.1.2 Nominal diameter of strand (inches [millimetres]),
*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
1

---------------------- Page: 1 ----------------------
A886/A886M − 16
TABLE 1 Nominal Dimensions of Indentations
Wire Diameter, d Nominal Diameter Depth, a Length, L Pitch, P
of Strand
Fig.
in. [mm] in. [mm] in. [mm] in. [mm] in. [mm]
1 (a) # 0.104 [# 2.6] 0.312 [7.9] 0.002 to 0.004 [0.05 to 0.10] 0.079 [2.0] 0.220 [5.6]
1 (a) > 0.125 [> 3.2] 0.375 [9.5] 0.002 to 0.005 [0.05 to 0.13] 0.108 [2.7] 0.220 [5.6]
0.438 [11.1]
0.500 [12.7]
1 (b) # 0.125 [# 3.2 ] 0.375 [9.5] 0.002 to 0.006 [0.05 to 0.15] 0.115 [2.9] 0.220 [5.6]
4.1.3 Grade of strand,
4.1.4 Type of strand (low-relaxation or stress-relieved (normal-relaxation)),
4.1.5 Other types of indented wire (7.4.2),
4.1.6 If joints or splices are permitted (8.1.1),
4.1.7 Weldless, if desired (8.1.4),
4.1.8 Inspection (11.1),
4.1.9 Load-elongation curve, if desired (13.2),
4.1.10 Packaging (4.1), and
4.1.11 ASTM designation and year of issue.
5. Materials and Manufacture
5.1 Base Metal—The base metal shall be carbon steel of such quality tha
...