ASTM A49-01
(Specification)Standard Specification for Heat-Treated Carbon Steel Joint Bars, Microalloyed Joint Bars, and Forged Carbon Steel Compromise Joint Bars
Standard Specification for Heat-Treated Carbon Steel Joint Bars, Microalloyed Joint Bars, and Forged Carbon Steel Compromise Joint Bars
SCOPE
1.1 This specification covers heat-treated carbon steel joint bars, microalloyed joint bars, and forged compromise joint bars for general use in standard railroad track.
1.2 The joint bars may be used for the production of insulated joints.
1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
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Designation: A 49 – 01
Standard Specification for
Heat-Treated Carbon Steel Joint Bars, Microalloyed Joint
1
Bars, and Forged Carbon Steel Compromise Joint Bars
ThisstandardisissuedunderthefixeddesignationA49;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 3.1.4 Punching—type (elliptical, oval, round, or combina-
tions), size, number, location, spacing and elevation of
1.1 This specification covers heat-treated carbon steel joint
punched holes, with dimensional drawing if necessary,
bars,microalloyedjointbars,andforgedcompromisejointbars
3.1.5 Head Easement—if required, and
for general use in standard railroad track.
3.1.6 Certification and Test Report Requirements (see
1.2 The joint bars may be used for the production of
11.1).
insulated joints.
1.3 The values stated in inch-pound units are to be regarded
4. Manufacture
as the standard. The values given in parentheses are for
4.1 The steel shall be made by one or both of the following
information only.
processes: basic-oxygen or electric-furnace.
2. Referenced Documents 4.1.1 The steel may be cast by a continuous process, or in
ingots.
2.1 ASTM Standards:
4.2 Heating and Quenching—Quenched carbon-steel joint
A 29/A29M Specification for Steel Bars, Carbon andAlloy,
bars and forged compromise joint bars shall be uniformly
Hot-Wrought and Cold-Finished, General Requirements
2
heated for punching, slotting, shaping, and forging and subse-
for
quently quenched. Maximum depth of decarburized layer of
A 370 Test Methods and Definitions for MechanicalTesting
3
forged bars shall not exceed 0.040 in.
of Steel Products
4.3 Microalloyed joint bars shall be produced from hot
A 700 Practices for Packaging, Marking, and Loading
2
rolled steel sections. Bars shall be sheared or sawed cold, and
Methods for Steel Products for Domestic Shipment
holes shall be drilled. No reheating and quenching is required.
2.2 American Railway Engineering and Maintenance of
4
Way Association Manual for Railway Engineering
5. Chemical Requirements
5.1 The chemical composition of the quenched carbon-steel
3. Ordering Information joint bars and forged compromise joint bars determined as
prescribed in 5.3 shall be within the limits shown in Table 1.
3.1 Orders for joint bars under this specification shall
5.2 Thechemicalcompositionofthemicroalloyedjointbars
include the following information as appropriate:
shall be agreed upon by the purchaser and the manufacturer.
3.1.1 Quantity—number of pairs of bars,
Microalloying shall be accomplished with columbium, vana-
3.1.2 Type—design or type bar along with section designa-
dium, and nitrogen, or combinations thereof.
tion and weight of rails being joined,
5.3 Heat or Cast Analysis—Separate analysis shall be made
3.1.3 Dimension—overall length,
from test samples representing one of the first three and one of
the last three ingots or continuously cast blooms preferably
taken during the pouring of the heat. Determinations may be
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
made chemically or spectrographically.Any portion of the heat
Stainless Steel and RelatedAlloys, and is the direct responsibility of Subcommittee
meeting the chemical analysis requirements of Table 1 may be
A01.01 on Steel Rails and Accessories.
applied. The first heat analysis shall be recorded as the official
Current edition approved April 10, 2001. Published May 2001. Originally
published as A 49 – 15. Last previous edition A 49 – 95.
heat analysis, but the purchaser shall have access to all ladle
2
Annual Book of ASTM Standards, Vol 01.05.
analyses.Additionally,anymaterialmeetingtheproductanaly-
3
Annual Book of ASTM Standards, Vol 01.03.
4
sis limits shown in Table 2 may be applied after testing such
Available fromAmerican Railway Engineering and Maintenance ofWayAssn.,
8201 Corporate Drive, Suite 1125, Landover, MD 20785. material in accordance with Specification A 29/A 29M.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
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A 49–01
TABLE 1 Chemical Requirements
a standard round tension test specimen with 2-in., or 50-mm
Element Composition, % gage length as described in Test Methods and Definitions
A 370.
Carbon 0.35–0.60
Manganese, max 1.20
6.3 Number of Tests—One tension test shall be made from
Phosphorus, max 0.04
each lot of 1000 bars or less, but not less than one test from
Sulfur, max 0.050
each heat or cast on each day in which bars are he
...
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