Manufacture of ASTM A108, ASME SA108 Carbon Steel, Alloy Steel Cold Finished Bars

Manufacturer of ASTM A-108, ASME SA-108 Carbon Steel, Alloy Steel Cold Finished Bar
Designation: A 108 – 07
Standard Specification for
Steel Bar, Carbon and Alloy, Cold-Finished1
This standard is issued under the fixed designation A 108; 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 (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.

Scope*
1.1 This specification covers cold-finished carbon and alloy
steel bars produced in straight length and coil to chemical
compositions. Cold-finished bars are suitable for heat treatment,
for machining into components, or for use in the
as-finished condition as shafting, or in constructional applications,
or for other similar purposes (Note 1). Grades of steel are
identified by grade numbers or by chemical composition.
NOTE 1—A guide for the selection of steel bars is contained in Practice
A 400.
1.2 Some end uses may require one or more of the available
designations shown under Supplementary Requirements.
Supplementary requirements shall apply only when specified
individually by the purchaser.
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.
Referenced Documents
2.1 ASTM Standards: 2
A 29/A 29M Specification for Steel Bars, Carbon and Alloy,
Hot-Wrought, General Requirements for
A 304 Specification for Carbon and Alloy Steel Bars Subject
to End-Quench Hardenability Requirements
A 322 Specification for Steel Bars, Alloy, Standard Grades
A 370 Test Methods and Definitions for Mechanical Testing
of Steel Products
A 400 Practice for Steel Bars, Selection Guide, Composition,
and Mechanical Properties
A 510 Specification for General Requirements for Wire
Rods and Coarse Round Wire, Carbon Steel
A 576 Specification for Steel Bars, Carbon, Hot-Wrought,
Special Quality
2.2 Other Documents:
SAE Handbook and SAE J1086 Recommended Practice for
Numbering Metals and Alloys (UNS)3
ISS Steel Bar Product Guidelines 4
Terminology
3.1 Definition:
3.1.1 product tolerance levels—cold-finished steel bar is
produced with up to four (4) increasingly tight tolerance levels,
for the individual product characteristics, dependent on the
method of manufacture necessary to meet purchaser-ordered
specification requirements. (Product Tolerance Level 1 is
selected, unless otherwise specified by purchaser.)
Ordering Information
4.1 Orders for cold-finished steel bar to this specification
should include the following items to adequately describe the
material:
4.1.1 Name of material,
4.1.2 ASTM specification number and date of issue,
4.1.3 Chemical composition, grade designation or limits,
4.1.4 Silicon level, if required,
4.1.5 Additional machinability-enhancing elements (see
Footnote F to Table 1 of Specification A 29/A 29M),
4.1.6 Condition (Surface Roughness tolerances listed in
Table A1.7),
4.1.7 Tolerance Levels (Reference tolerances listed in Table
A1.1 through Table A1.9),
4.1.8 Shape (round, hexagon, square, flat, etc.), size, and
length,
4.1.9 Report of heat analysis, if required,
4.1.10 End use,
4.1.11 Additions to the specification and special or supplementary
requirements, if required, and
4.1.12 For coiled product, the coil weights, inside diameter,
outside diameter, and coil height limitations, when required.
NOTE 2—A typical ordering description is as follows: Steel Bar; ASTM
A 108, dated ; SAE 1117; Coarse Grain; Cold Drawn; 1.500-in. 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 A01.15 on Bars. Current edition approved Sept. 1, 2007. Published September 2007. Originally approved in 1926. Last previous edition approved in 2003 as A 108 – 03e1. 2 For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards volume information, refer to the standard’s Document Summary page on the ASTM website. 3 Available from Society of Automotive Engineers (SAE), 400 Commonwealth Dr., Warrendale, PA 15096-0001. 4 Available from ISS Customer Service, 410 Commonwealth Drive, Warrendale, PA, 15086. 1 *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. Copyright by ASTM Int’l (all rights reserved); Tue Apr 29 04:30:08 EDT 2008 Downloaded/printed by Dalian Univ of Technology pursuant to License Agreement. No further reproductions authorized. (38.10 mm) diameter round; 12 ft (3657.61 mm) long; Heat Analysis Required; Precision Machined Parts. NOTE 3—A more complex ordering description is as follows: Steel Bar; ASTM A 108, dated ; SAE 1045; Fine Grain; Cold Drawn, Turned,
Ground and Polished; chamfer both ends; Mechanical Property Test
Results; Hardness test; 2.000-in. (50.80 mm) diameter round; 12 ft
(3657.61 mm) long; Heat Analysis Required; Precision Machined Parts.
Product codes allow you to abbreviate, yet identify a complex ordering
description in the following simplified description: Steel Bar: ASTM
A 108, dated _; SAE 1045; Fine Grain; 2.000-in. (50.80 mm) diameter
round; 12 ft (3657.61 mm) long; Heat Analysis Required; Precision
Machined Parts.
General Requirements
5.1 Material furnished under this specification shall conform
to the applicable requirements of the current edition of
Specification A 29/A 29M.
Materials and Manufacture
6.1 Feedstock—Cold-finished steel bar shall be produced
from hot-wrought carbon or alloy steel bar (Specification
A 29/A 29M), or from hot-wrought rod designated for coldfinished
bar (Specification A 510).
6.2 Condition—The product shall be furnished in one of the
following conditions as specified by the purchaser.
6.2.1 Rounds:
6.2.1.1 Cold drawn,
6.2.1.2 Cold drawn, turned, and polished,
6.2.1.3 Cold drawn, ground, and polished,
6.2.1.4 Cold drawn, turned, ground, and polished,
6.2.1.5 Cold drawn, turned, and ground,
6.2.1.6 Hot wrought, turned, and polished,
6.2.1.7 Hot wrought, turned, ground and polished,
6.2.1.8 Hot wrought, turned, and ground, and
6.2.1.9 Hot wrought, rough turned.
6.2.2 Squares, Hexagons:
6.2.2.1 Cold drawn, and
6.2.2.2 Cold rolled.
6.2.3 Flats:
6.2.3.1 Cold drawn, and
6.2.3.2 Cold rolled.
6.2.4 Special Bar Sections:
6.2.4.1 Cold drawn, and
6.2.4.2 Cold rolled.
6.3 Heat Treatment:
6.3.1 Unless otherwise specified, the bars shall be furnished
as cold-finished. Plain Carbon Steels with a maximum carbon
over 0.55 % and Alloy Steels with a maximum carbon over
0.38 % shall be annealed prior to cold finishing.
6.3.2 The following heat-treatment processes may be performed
singularly or in combination:
6.3.2.1 Annealed,
6.3.2.2 Normalized,
6.3.2.3 Stress relieved, and
6.3.2.4 Quenched and tempered.
Chemical Composition
7.1 Chemical Composition:
7.1.1 The chemical analysis of the steel shall conform to
that specified in Specification A 29/A 29M for the steel grade
ordered, or to such other limits as may be specified using the
standard ranges in Specification A 29/A 29M.
7.1.2 Steels may be selected from: Specifications A 29/
A 29M, A 304, A 322, A 510, and A 576; the SAE Handbook;
or the ISS Steel Bar Product Guideline for Bar Steel.
7.1.3 When a steel’s composition cannot be identified by a
standard grade number in accordance with 7.1.1 and 7.1.2, the
limits for each required element may be specified using the
chemical ranges shown in the table (Heat Analysis Chemical
Ranges and Limits of Carbon Steel Bars) of Specification
A 29/A 29M.
Tolerance Levels
8.1 Cold-Finished Bars—The permissible dimensional
variations for cold-finished carbon and alloy steel bar shall not
exceed the applicable tolerance levels or limits stated in Annex
A1 for inch-pound values.
Workmanship, Finish, and Product Presentation
9.1 Workmanship:
9.1.1 Within the limits of good manufacturing and inspection
practices, the bars shall be free of injurious imperfections
which, due to their nature, degree, or extent, will interfere with
the use of the material in machining or fabrication of suitable
parts.
9.1.2 Table A1.8 contains the recommended minimum stock
removal to ensure removal of surface discontinuities in cold
finished bars.
9.2 Finish:
9.2.1 Unless otherwise specified, the bars shall have a
commercial bright smooth surface finish, obtained by conventional
cold-finishing operations such as cold drawing or cold
rolling.
9.2.2 When a superior bar surface finish is required, bars
may be obtained as: turned and polished, ground and polished,
or turned, ground, and polished. (Reference Table A1.7)
9.2.3 Bars that are thermally treated after cold finishing may
exhibit a discolored or oxidized surface.
9.3 Product Presentation:
9.3.1 The bars shall be given a surface coating of oil or other
rust inhibitor to protect against corrosion during shipment.
9.3.2 The bar bundles shall be identified, packaged and
loaded to preserve the physical appearance, product tolerance
and identity of the cold-finished product, as agreed upon
between the purchaser and supplier.
Certification
10.1 Upon request of the purchaser in the contract or order,
a manufacturer’s certification that the material was manufactured
and tested in accordance with this specification together
with a report of the test results shall be furnished at the time of
shipment.
Keywords
11.1 alloy steel; carbon steel; cold-finished; steel bar
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SUPPLEMENTARY REQUIREMENTS
One or more of the following supplementary requirements shall be applied only when specified by
the purchaser in the inquiry, contract, or order. Details of these supplementary requirements shall be
agreed upon in writing, by the manufacturer and the purchaser. Supplementary requirements shall in
no way negate any requirement of the specification itself.
S1. Hot Rolling Reduction Ratio
S1.1 When required, purchaser may require the supplier to
report the reduction ratio of the initial Bloom/Billet cross
sectional area to finished hot rolled cross sectional area.
S2. Steel Melting Process
S2.1 When required, purchaser may require the supplier to
report the steel melting process (Basic Oxygen Furnace,
Electric Arc Furnace, etc.) for each initial heat/lot number
supplied to the purchaser.
S3. Steel Refinement Process
S3.1 When required, purchaser may require the supplier to
report the steel refinement processes performed after melting
and before casting (Vacuumed Degassed, etc.) on the heat/lot
number supplied to the purchaser.
S4. Continuous Casting Process
S4.1 When required, purchaser may require the supplier to
report the casting process (Bloom, Billet, etc.) for each heat/lot
number supplied to the purchaser.
S5. Country or Countries of Origin
S5.1 When required, purchaser may require the supplier to
report the country of origin where the steel was melted for each
heat/lot number supplied to the purchaser.
S5.2 When required, purchaser may require the supplier to
report the country of origin where the steel was hot rolled for
each heat/lot number supplied to the purchaser.
S5.3 When required, purchaser may require the supplier to
report the country of origin where the steel was cold finished
for each heat/lot number supplied to the purchaser.
S6. Mechanical Properties
S6.1 When required, purchaser may require the supplier to
report the cold-finished steel bar mechanical properties for
each heat/lot number supplied to the purchaser. Mechanical
properties shall be evaluated in accordance with Test Methods
and Definitions in Test Methods A 370.
S7. Surface Inspection
S7.1 When required, purchaser may require the supplier to
inspect the cold finish steel bar surface within an electromagnetic
surface inspection process to detect and sort surface
discontinuities that exceed the maximum allowed depth tolerances
listed in Table A1.8 or other tolerances agreed upon
between the purchaser and supplier.
S8. Bar Marking
S8.1 When required, bar marking specification requirements
shall be agreed upon between the purchaser and supplier.
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ANNEX
(Mandatory Information)
A1. PERMISSIBLE VARIATIONS IN QUALITY CHARACTERISTICS—INCH-POUND AND METRIC UNITS
TABLE A1.1 Size Tolerances for Level One Cold-Finished Carbon Steel Bars, Cold Drawn or Turned and Polished
Size, in. (mm)A
Maximum of Carbon Range
0.28 % or less
Maximum of Carbon Range
over 0.28 % to 0.55 % incl
Maximum of Carbon Range
to 0.55 % incl,
Stress Relieved or Annealed
after Cold Finishing
Maximum of Carbon Range
over 0.55 % or All Grades
Quenched and Tempered or
Normalized and Tempered
before Cold Finishing
All tolerances are in inches (mm) and are minusB
Rounds—Cold DrawnC to 6 in.(152.4 mm) or Turned and Polished
To 11⁄2 (38.1) incl, in coils, or cut lengths 0.002 (.051) 0.003 (.076) 0.004 (.102) 0.005 (.127)
Over 11⁄2 (38.10) to 21⁄2 (63.50) incl 0.003 (.076) 0.004 (.102) 0.005 (.127) 0.006 (.152)
Over 21⁄2 (63.50) to 4 (101.60) incl 0.004 (.102) 0.005 (.127) 0.006 (.152) 0.007 (.178)
Over 4 (101.60) to 6 (152.40) incl 0.005 (.127) 0.006 (.152) 0.007 (.178) 0.008 (.203)
Over 6 (152.40) to 8 (203.20) incl 0.006 (.152) 0.007 (.178) 0.008 (.203) 0.009 (.229)
Over 8 (203.20) to 9 (228.60) incl 0.007 (.178) 0.008 (.203) 0.009 (.229) 0.010 (.254)
Hexagons
To 3⁄4 (19.05) incl 0.002 (.051) 0.003 (.076) 0.004 (.102) 0.006 (.152)
Over 3⁄4 (19.05) to 11⁄2 (38.10) incl 0.003 (.076) 0.004 (.102) 0.005 (.127) 0.007 (.178)
Over 11⁄2 (38.10) to 21⁄2 (63.50) incl 0.004 (.102) 0.005 (.127) 0.006 (.152) 0.008 (.203)
Over 21⁄2 (63.50) to 31⁄8 (79.38) incl 0.005 (.127) 0.006 (.152) 0.007 (.178) 0.009 (.229)
Over 31⁄8 (79.38) to 4 (101.60) incl 0.005 (.127) 0.006 (.152) . . . . . .
Squares
To 3⁄4 (19.05) incl 0.002 (.051) 0.004 (.102) 0.005 (.127) 0.007 (.178)
Over 3⁄4 (19.05) to 11⁄2 (38.10) incl 0.003 (.076) 0.005 (.127) 0.006 (.152) 0.008 (.203)
Over 11⁄2 (38.10) to 21⁄2 (63.50) incl 0.004 (.102) 0.006 (.152) 0.007 (.178) 0.009 (.229)
Over 21⁄2 (63.50) to 4 (101.60) incl 0.006 (.152) 0.008 (.203) 0.009 (.229) 0.011 (.279)
Over 4 (101.60) to 5 (127.00) incl 0.010 (.254) . . . . . . . . .
Over 5 (127.00) to 6 (152.4) incl 0.014 (.356) . . . . . . . . .
FlatsD
Width:
To 3⁄4 (19.05) incl 0.003 (.076) 0.004 (.102) 0.006 (.152) 0.008 (.203)
Over 3⁄4 (19.05) to 1 1⁄2 (38.10) incl 0.004 (.102) 0.005 (.127) 0.008 (.203) 0.010 (.254)
Over 11⁄2 (38.10) to 3 (76.2) incl 0.005 (.127) 0.006 (.152) 0.010 (.254) 0.012 (.305)
Over 3 (76.2) to 4 (101.60) incl 0.006 (.152) 0.008 (.203) 0.011 (.279) 0.016 (.410)
Over 4 (101.60) to 6 (152.40) incl 0.008 (.203) 0.010 (.254) 0.012 (.305) 0.020 (.508)
Over 6 (152.40) 0.013 (.330) 0.015 (.381) . . . . . .
A Standard manufacturing practice is shear cut for cold drawn bars (size limits vary by producer) which can cause end distortion resulting in those portions of the bar
being outside the applicable size tolerance. When this end condition is undesirable, a saw cut end to remove end distortion should be considered.
B While size tolerances are usually specified as minus, tolerances may be ordered all plus, or distributed plus and minus, with the sum being equivalent to the tolerances
listed.
C Maximum allowable deviation in roundness around the circumference of the same cross-section of a round cold drawn bar is 1⁄2 the size tolerance range.
D Width governs the tolerances for both width and thickness of flats. For example, when the maximum of carbon range is 0.28 % or less, for a flat 2 in. (50.80 mm) wide
and 1 in. (25.40 mm) thick, the width tolerance is 0.005 in. (.127 mm) and the thickness tolerance is the same, namely, 0.005 in. (.127 mm).
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TABLE A1.2 Size Tolerances for Level One Cold-Finished Alloy Steel Bars, Cold Drawn or Turned and Polished
Size, in. (mm)A
Maximum of Carbon Range
0.28 % or less
Maximum of Carbon Range
over 0.28 % to 0.55 % incl
Maximum of Carbon Range
to 0.55 % incl,
Stress Relieved or Annealed
after Cold Finishing
Maximum of Carbon Range
over 0.55 % with or without
Stress Relieving or Annealing
after Cold Finishing.
Also, all Carbons, Quenched
and tempered (heat treated),
or Normalized and Tempered,
before Cold Finishing
All tolerances are in inches (mm) and are minusB
Rounds-Cold DrawnC to 6 in. (152.40 mm) or Turned and Polished
To 1 (25.4) incl, in coils 0.002 (.051) 0.003 (.076) 0.004 (.102) 0.005 (.127)
Cut Lengths:
To 11⁄2 (38.10) incl 0.003 (.076) 0.004 (.102) 0.005 (.127) 0.006 (.152)
Over 11⁄2 (38.10) to 21⁄2 (63.50) incl 0.004 (.102) 0.005 (.127) 0.006 (.152) 0.007 (.178)
Over 21⁄2 (63.50) to 4 (101.60) incl 0.005 (.127) 0.006 (.152) 0.007 (.178) 0.008 (.203)
Over 4 (101.60) to 6 (152.40) incl 0.006 (.152) 0.007 (.178) 0.008 (.203) 0.009 (.229)
Over 6 (152.40) to 8 (203.20) incl 0.007 (.178) 0.008 (.203) 0.009 (.229) 0.010 (.254)
Over 8 (203.20) to 9 (228.60) incl 0.008 (.203) 0.009 (.229) 0.010 (.254) 0.011 (.279)
Hexagons
To 3⁄4 (19.05) incl 0.003 (.076) 0.004 (.102) 0.005 (.127) 0.007 (.178)
Over 3⁄4 (19.05) to 11⁄2 38.10) incl 0.004 (.102) 0.005 (.127) 0.006 (.152) 0.008 (.203)
Over 11⁄2 (38.10) to 21⁄2 (63.50) incl 0.005 (.127) 0.006 (.152) 0.007 (.178) 0.009 (.229)
Over 21⁄2 (63.50) to 31⁄8 (79.38) incl 0.006 (.152) 0.007 (.178) 0.008 (.203) 0.010 (.254)
Over 31⁄8 (79.38) to 4 (101.60) incl 0.006 (.152) … … …
Squares
To 3⁄4 (19.05) incl 0.003 (.076) 0.005 (.127) 0.006 (.152) 0.008 (.203)
Over 3⁄4 (19.05) to 11⁄2 (38.10) incl 0.004 (.102) 0.006 (.152) 0.007 (.178) 0.009 (.229)
Over 11⁄2 (38.10) to 21⁄2 (63.50) incl 0.005 (.127) 0.007 (.178) 0.008 (.203) 0.010 (.254)
Over 21⁄2 (63.50) to 4 (101.60) incl 0.007 (.178) 0.009 (.229) 0.010 (.254) 0.012 (.305)
Over 4 (101.60) to 5 (127.00) incl 0.011 (.279) … … …
FlatsD
To 3⁄4 (19.05) incl 0.004 (.102) 0.005 (.127) 0.007 (.178) 0.009 (.229)
Over 3⁄4 (19.05) to 11⁄2 (38.10) incl 0.005 (.127) 0.006 (.152) 0.009 (.229) 0.011 (.279)
Over 11⁄2 (38.10) to 3 (76.2) incl 0.006 (.152) 0.007 (.178) 0.011 (.279) 0.013 (.330)
Over 3 (76.2) to 4 (101.60) incl 0.007 (.178) 0.009 (.229) 0.012 (.305) 0.017 (.432)
Over 4 (101.60) to 6 (152.40) incl 0.009 (.229) 0.011 (.279) 0.013 (.330) 0.021 (.533)
Over 6 (152.40) 0.014 (.356) … … …
A Standard manufacturing practice is shear cut for cold drawn bars (size limits vary by producer) which can cause end distortion resulting in those portions of the bar
being outside the applicable size tolerance. When this end condition is undesirable, a saw cut end to remove end distortion should be considered.
B While size tolerances are usually specified as minus, tolerances may be ordered all plus, or distributed plus and minus, with the sum being equivalent to the tolerances
listed.
C Maximum allowable deviation in roundness around the circumference of the same cross-section of a round cold drawn bar is 1⁄2 the size tolerance range.
D Width governs the tolerances for both width and thickness of flats. For example, when the maximum of carbon range is 0.28 % or less, for a flat 2 in. (50.80 mm) wide
and 1 in. (25.40 mm) thick, the width tolerance is 0.006 in. (.152 mm) and the thickness tolerance is the same, namely, 0.006 in. (.152mm).
TABLE A1.3 Size Tolerances for Level Two and Level Three Cold Finished Round Bars Cold Drawn, Ground and Polished, or Turned,
Ground and Polished
Size, in. (mm) Cold Drawn, Ground and PolishedA Size, in. (mm) Turned, Ground and PolishedA
Tolerances from Specified Size, Minus Only, in. (mm)
Level 2 Level 3
To 11⁄2 (38.10) incl To 11⁄2 (38.10) incl 0.001 (.0254) 0.0008 (.0203)
Over 11⁄2 (38.10) to 21⁄2 (63.50) excl Over 11⁄2 (38.10) to 21⁄2 (63.50) excl 0.0015 (.0381) 0.0013 (.033)
21⁄2 (63.50) to 3 (76.20) incl 21⁄2 (63.50) to 3 (76.20) incl 0.002 (.0508) 0.001 5(.0381)
Over 3 (76.20) to 4 (101.60) incl Over 3 (76.20) to 4 (101.60) incl 0.003 (.0762) 0.0025 (.0635)
. . . Over 4 (101.60) to 6 (152.40) incl 0.004 (.1016)B 0.003 (.0762)B
. . . Over 6 (152.40) 0.005 (.127)B 0.004 (.1016)B
A Maximum allowable deviation of roundness or ovality tolerances are agreed upon between purchaser and supplier.
B For nonresulfurized steels (steels specified to maximum sulfur limits under 0.08 %), or for steels thermally treated, the tolerance is increased by 0.001 in. (.025 mm).
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TABLE A1.4 Straightness Tolerances for Level One Cold Finished BarsA,B
NOTE—All grades quenched and tempered or normalized and tempered to Brinell 302 max before cold finishing; and all grades stress relieved or
annealed after cold finishing. Straightness tolerances are not applicable to bars having Brinell hardness exceeding 302.
Size, in. (mm) Length, ft (mm)
Straightness Tolerances, in. (mm) (Maximum Deviation) from Straightness
in any 10-ft Portion of the Bar
Maximum of Carbon Range,
0.28 % or Less
Maximum of Carbon Range,
over 0.28 % and
All Grades Thermally Treated
Rounds
Squares, Hexagons,
and Octagons
Rounds
Squares, Hexagons,
and Octagons
Less than 5⁄8 (15.88) Less than 15 (4572) 1⁄8 (3.17) 3⁄16 (4.76) 3⁄16 (4.76) 1⁄4 (6.35)
Less than 5⁄8 (15.88) 15 (4572) and over 1⁄8 (3.17) 5⁄16 (7.94) 5⁄16 (7.94) 3⁄8 (9.53)
5⁄8 (15.88) and over Less than 15 (4572) 1⁄16 (1.59) 1⁄8 (3.17) 1⁄8 (3.17) 3⁄16 (4.76)
5⁄8 (15.88) and over 15 (4572) and over 1⁄8 (3.17) 3⁄16 (4.76) 3⁄16 (4.76) 1⁄4 (6.35)
A The foregoing tolerances are based on the following method of measuring straightness: Departure from straightness is measured by placing the bar on a level table
so that the arc or departure from straightness is horizontal, and the depth of the arc is measured with a feeler gage and a straightedge.
B It should be recognized that straightness is a perishable quality and may be altered by mishandling. The preservation of straightness in cold-finished bars requires the
utmost care in subsequent handling. Specific straightness tolerances are sometimes required for carbon and alloy steels in which case the purchaser should inform the
manufacturer of the straightness tolerances and the methods to be used in checking the straightness.
TABLE A1.5 Length Tolerances for Cold Finished Steel Bar
Product
Tolerance
Level
Tolerances, inches (mm) Plus
Allowable Deviation above Specified Uniform Length
Cutting Process Minimum Maximum
Level 1 Shear Cut 0.000 2.000 (50.80)
Level 2 In-Line Saw Cut 0.000 1.000 (25.40)
Level 3 Off-Line Saw Cut 0.000 0.500 (12.70)
TABLE A1.6 Across-Corner Tolerances for Hexagon and Square Cold Drawn Steel BarA
Product
Tolerance
Level
Tolerance Range Applied to Across Corner Calculations
Hexagon,
Inches (mm), Minus
Square,
Inches (mm), Minus
Level 1 0.025 (.64) 0.030 (.76)
Level 2 0.020 (.51) 0.025 (.64)
Level 3 0.015 (.38) 0.020 (.51)
Sharp Corner Hexagon Calculation = (1.1547 3 D) Sharp Corner Square Calculation = (1.4142 3 D)
Round Corner Hexagon Calculation = [1.1547 3 (D – 2r)] + 2r Round Corner Square Calculation = [1.4142 3 (D – 2r)] + 2r
A When required, type of corner must be specified at time of order inquiry.
TABLE A1.7 Surface Roughness AverageA (Ra) Tolerances for Cold-Finished Steel Bar
Product
Tolerance
Level
Allowable Maximum Deviation of Surface Roughness Average (Ra) Measurement
Turned and Polished Ground and Polished
Maximum, (μin.)
(Ra)
Maximum, (μin.)
(Ra)
Level 1 Not Required 40
Level 2B 60 30
Level 3B 40 20
A RMS (root mean square calculation) is no longer applied to measure surface roughness. Roughness average (Ra) is current technology measurement output data.
B Special surface Ra restrictions must be agreed upon at time of order inquiry, between purchaser and supplier. Lower Ra values are available with additional bar passes
and/or special processing conditions.
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SUMMARY OF CHANGES
Committee A01 has identified the location of selected changes to this standard since the last issue
(A 108 – 03e1) that may impact the use of this standard. (Approved Sept. 1, 2007.)
(1) Changes made to 9.1.1. (2) Added 9.1.2.
TABLE A1.8 Surface Discontinuity Tolerances for Cold-Finished Steel BarA
Product
Tolerance
Level
Maximum Allowable Surface Discontinuity Depth
Carbon and Alloy
Non-resulfurized
Carbon and Alloy
Resulfurized (0.08 thru 0.19 % Sulfur)
Carbon and Alloy
Resulfurized (0.20 thru 0.35 % Sulfur)
Maximum Depth
1⁄4 (6.35 mm)
thru 5⁄8 (15.88 mm)
max. inches (mm)
Maximum Depth
(% of Size)
over 5⁄8 (15.88 mm)
thru 6 (152.40 mm)
(max. percentage)
Maximum Depth
1⁄4 (6.35 mm)
thru 5⁄8 (15.88 mm)
max. inches (mm)
Maximum Depth
(% of Size)
over 5⁄8 (15.88 mm)
thru 6 (152.40 mm)
max. percentage)
Maximum Depth
1⁄4 (6.35 mm)
thru 5⁄8 (15.88 mm)
max. inches (mm)
Maximum Depth
(% of Size)
5⁄8 (15.88 mm)
thru 6 (152.40 mm)
(max., percentage)
Level 1 0.008 (.20) 1.6 % 0.010 (.25) 2.0 % 0.012 (.30) 2.4 %
Level 2 0.006 (.15) 1.0 % 0.008 (.20) 1.3 % 0.010 (.25) 1.6 %
Level 3 0.006 (.15) 0.75 % 0.006 (.15) 1.0 % 0.008 (.20) 1.3 %
Level 4B Nil Nil Nil Nil Nil Nil
A The information in the chart is the expected maximum surface discontinuity depth within the limits of good manufacturing practice. Occasional bars in a shipment may
have surface discontinuities that exceed these limits. For critical applications, the purchaser may require the cold finish steel bar supplier to eddy current test the bars prior
to shipment.
B Level 4 requires metal removal by turning or multiple grinding passes for small bars.
TABLE A1.9 Surface Decarburization Tolerances for Cold-Finished Steel Bar
Product
Tolerance
Level
Maximum Affected Depth
All Carbon or Alloy Steel Grades
Maximum Inches of Decarburization per Side of Bar
1⁄4 (6.35 mm) thru 5⁄8 (15.88 mm) Sizes, All Shapes,
Max. inches (mm)
Maximum Percentage of Decarburization per Side
Based on Percentage of Size over 5⁄8 (15.88 mm) thru 6 (152.40
mm) Sizes, All Shapes,
(max., %)
Level 1 0.010 in.(.25) 1.6 %
Level 2 0.006 in.(.15) 1.0 %
Level 3A Nil Nil
A Level 3 requires metal removal by turning or multiple grinding for small bars.
A 108 – 07

Inspection & Approval Certificates : C/W Certificate (Calibration Works Certificate) EN-10204 3.1 / DIN-50049 3.1 / ISO-10474 3.1 Mill Test Certificate,
ISI Mark, BIS Certified, NACE HIC TM-0284 / NACE MR-0103 / NACE MR-0175 / ISO 15166, CE Marking, PED Certified, PED Approved,
European Pressure Equipment Directive PED-2014/68/EU, AD-2000-WO, ASME Boiler & Pressure Vessel Code Section-II Plate A Edition 2019,
API 6A (American Petroleum Institute), ISO 9001 Certified, NADCAP Certified, EN9100 Certified, AS9100 Certified with EN 10204 3.2 Certificate
duly Certified & Approved by IBR (Indian Boiler Regulations), LR Class (Lloyd’s Register), GL (Germanischer Lloyd), BV (Bureau Veritas),
DNV (Det Norske Veritas), ABS Class (American Bureau of Shipping), SGS, TUV, RINA, IR Class (Indian Register of Shipping),
NORSOK Approved Standard M-630, M-650 Rev.3

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Regards,

CONTACT PERSON :

MUKESH SHAH
Director
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