ASTM A911/A911M-11

Standard Specification for Uncoated, Stress-Relieved Steel Bars for Prestressed Concrete Ties

ABSTRACT
This specification covers uncoated, stress-relieved steel bars for prestressed concrete railroad ties. Analysis of the steel shall conform to the chemical requirements specified by the specification. Mechanical requirements including test method, tensile strength, yield strength, elongation and wrapping test are provided. One test specimen each for the tensile test and the wrapping test shall be taken for every 10 coils or fraction thereof in a lot.
SCOPE
1.1 This specification covers uncoated stress-relieved steel bars for use in prestressed concrete railroad ties.
1.2 A supplementary requirement (S1) is provided for use where low-relaxation bars and relaxation testing for that product is required by the purchaser. The supplementary requirement applies only when specified in the purchase order or contract.  
1.3 This specification is applicable for orders in either inch-pounds units (as Specification A911) or in SI units (as Specification A911M).
1.4 The values stated in either inch-pound units or SI units are to be regarded separately as standards. Within the text, the SI units are shown in brackets. 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: 14-Jan-2011
• 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 A911/A911M-05 - Standard Specification for Uncoated, Stress-Relieved Steel Bars for Prestressed Concrete Ties
• Effective Date: 15-Jan-2011

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: A911/A911M −11
StandardSpecification for
Uncoated, Stress-Relieved Steel Bars for Prestressed
1
Concrete Railroad Ties
This standard is issued under the fixed designationA911/A911M; 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* 3. Terminology
1.1 This specification covers uncoated stress-relieved steel 3.1 Definitions of Terms Specific to This Standard:
bars for use in prestressed concrete railroad ties. 3.1.1 lot, n—all the coils of bars of the same nominal bar
size contained on an individual shipping release or shipping
1.2 A supplementary requirement (S1) is provided for use
order, from the same heat of steel.
where low-relaxation bars and relaxation testing for that
product is required by the purchaser. The supplementary
4. Ordering Information
requirement applies only when specified in the purchase order
4.1 It shall be the responsibility of the purchaser to specify
or contract.
all requirements that are necessary for bars ordered to this
1.3 This specification is applicable for orders in either
specification. Such requirements shall include, but are not
inch-pounds units (as Specification A911) or in SI units (as
limited to, the following:
Specification A911M).
4.1.1 Quantity (weight) [mass],
4.1.2 Name of material (uncoated, stress-relieved bars for
1.4 The values stated in either inch-pound units or SI units
prestressed concrete railroad ties),
are to be regarded separately as standards. Within the text, the
4.1.3 Nominal diameter of bar (inches) [millimetres],
SI units are shown in brackets. The values stated in each
4.1.4 Inspection (Section 12),
system are not exact equivalents; therefore, each system must
4.1.5 Load-elongation curve (14.2),
be used independently of the other. Combining values from the
4.1.6 Core diameter and length of coils (15.1),
two systems may result in nonconformance with the specifi-
4.1.7 Packaging,
cation.
4.1.8 Supplementary Requirement S1 (if desired), and
2. Referenced Documents
4.1.9 ASTM designation and year of issue.
2
2.1 ASTM Standards:
5. Manufacture
A370 Test Methods and Definitions for Mechanical Testing
5.1 The bars shall be made from properly identified heats of
of Steel Products
steel made by the electric-furnace, the open-hearth, or the
E328 Test Methods for Stress Relaxation for Materials and
basic-oxygen process.
Structures
3
2.2 Federal Standard: 5.2 After hot-rolling, the bars shall be cold-drawn and
finally stress-relieved by induction heat treatment to produce
Fed. Std. No. 123 Marking for Shipments (Civil Agencies)
3
the desired mechanical properties and then coiled.
2.3 Military Standards:
MIL-STD-129 Marking for Shipment and Storage
6. Chemical Requirements
6.1 An analysis of each heat of steel shall be made by the
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
manufacturer from test samples taken during the pouring of
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
each heat.
A01.05 on Steel Reinforcement.
Current edition approved Jan. 15, 2011. Published February 2011. Originally
6.2 The analysis of the steel shall conform to the chemical
published in 1992. Last previous edition approved in 2005 as A911/A911M – 05.
requirements specified in Table 1.
DOI: 10.1520/A0911_A0911M-11.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
7. Mechanical Property Requirements
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
7.1 Test Method—Tests shall be made in accordance with
the ASTM website.
Test Methods and Definitions A370, including Annex A4,
3
Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
using full-size bar specimens taken from either end of the coil
Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://
dodssp.daps.dla.mil. of the finished product.
*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

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A911/A911M − 11
TABLE 1 Chemical Requirements
9.3 Straightness—After uncoiling, there shall be no residual
Element Composition, % out-of-linedeformationgreaterthan0.4in.[10mm]inalength
A
Carbon 0.70–0.90 of 40 in. [1000 mm].
Silicon 0.10–0.35
B
Manganese 0.50–0.90
10. Sampling
Chromium, max 0.15
Phosphorus, max 0.030
10.1 Test specimens taken from either end of the coil are
Sulphur, max 0.035
permitted.
Copper, max 0.30
A
...

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:A911/A911M–05 Designation: A911/A911M – 11
Standard Specification for
Uncoated, Stress-Relieved Steel Bars for Prestressed
1
Concrete Railroad Ties
This standard is issued under the fixed designationA911/A911M; 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 uncoated stress-relieved steel bars for use in prestressed concrete railroad ties.
1.2Supplement I describes low-relaxation bars and relaxation testing for that product. Low-relaxation bars shall be furnished
when specifically ordered, and may be furnished in place of regular bars if mutually agreed to by the purchaser and manufacturer.
1.2 A supplementary requirement (S1) is provided for use where low-relaxation bars and relaxation testing for that product is
required by the purchaser. The supplementary requirement applies only when specified in the purchase order or contract.
1.3 This specification is applicable for orders in either inch-pounds units (as SpecificationA911) or in SI units (as Specification
A911M).
1.4 The values stated in either inch-pound units or SI units are to be regarded separately as standards. Within the text, the SI
units are shown in brackets. 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.
2. Referenced Documents
2
2.1 ASTM Standards:
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
E328 Test Methods for Stress Relaxation for Materials and Structures
3
2.2 Federal Standard:
Fed. Std. No. 123Marking for Shipments (Civil Agencies) Fed. Std. No. 123 Marking for Shipments (Civil Agencies)
3
2.3 Military Standards:
3
MIL-STD-129Marking for Shipment and Storage
3
MIL-STD-163Steel Mill Products Preparation for Shipment and Storage Marking for Shipment and Storage
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 lot, n—all the coils of bars of the same nominal bar size contained on an individual shipping release or shipping order,
from the same cast or heat of steel.
4. Ordering Information
4.1 It shall be the responsibility of the purchaser to specify all requirements that are necessary for bars ordered to this
specification. Such requirements shall include, but are not limited to, the following:
4.1.1 Quantity (weight) [mass],
4.1.2 Name of material (uncoated, stress-relieved bars for prestressed concrete railroad ties),
4.1.3Diameter of bar (inches) [millimetres],
4.1.4Packaging,
4.1.5ASTM designation and year of issue, and
1
This specification is under the jurisdiction ofASTM CommitteeA01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility of SubcommitteeA01.05
on Steel Reinforcement.
Current edition approved May 1, 2005. Published May 2005. Originally published in 1992. Last previous edition approved in 2002 as A911/A911M–02. DOI:
10.1520/A0911_A0911M-05.
Current edition approved Jan. 15, 2011. Published February 2011. Originally published in 1992. Last previous edition approved in 2005 as A911/A911M – 05. DOI:
10.1520/A0911_A0911M-11.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM 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 Standardization Documents Order Desk, DODSSP, Bldg. 4, Section D, 700 Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.19111-5098,
http://dodssp.daps.dla.mil.
*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 ----------------------
A911/A911M – 11
4.1.6Special requirements, if any.
NOTE1—Atypical ordering description is as follows: 100 tons [90 t] uncoated, stress-relieved steel bars for prestressed concrete railroad ties, 0.394-in.
[10-mm] diameter bars in 6.5-ft [2.0-m] diameter coils to ASTM AXXX– [AXXXM–].
4.1.3 Nominal diameter of bar (inches) [millimetres],
4.1.4 Inspection (Section 12),
4.1.5 Load-elongation curve (14.2),
4.1.6 Core diameter and length of coils (15.1),
4.1.7 Packaging,
4.1.8 Supplementar
...