ASTM B691-02(2007)

Standard Specification for Iron-Nickel-Chromium-Molybdenum Alloys (UNS N08366 and UNS N08367) Rod, Bar, and Wire

ABSTRACT
This specification covers the standard for hot-finished and cold-finished rounds, squares, hexagons, octagons, and rectangles made from iron-nickel-chromium-molybdenum alloys (UNS N08366 and UNS N08367). Mechanical properties such as tensile strength, yield strength, and elongation shall be tested accordingly. Each specimen shall be subjected to chemical analysis and tension test.
SCOPE
1.1 This specification covers iron-nickel-chromium-molybdenum alloys (UNS N08366 and UNS N08367)* in the form of hot-finished and cold-finished rounds, squares, hexagons, octagons, and rectangles.
1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 The following safety hazards caveat pertains only to the test methods portion, Section 12, of this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to become familiar with all hazards including those identified in the appropriate Material Safety Data Sheet (MSDS) for this product/material as provided by the manufacturer, to establish appropriate safety and health practices, and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 31-Oct-2007
• ICS: 77.140.60 - Steel bars and rods
• Technical Committee: B02 - Nonferrous Metals and Alloys
• Drafting Committee: B02.07 - Refined Nickel and Cobalt and Their Alloys

Relations

• Replaces: ASTM B691-02 - Standard Specification for Iron-Nickel-Chromium-Molybdenum Alloys (UNS N08366 and UNS N08367) Rod, Bar, and Wire
• Effective Date: 01-Nov-2007
• Replaced By: ASTM B691-02(2013) - Standard Specification for Iron-Nickel-Chromium-Molybdenum Alloys (UNS N08366 and UNS N08367) Rod, Bar, and Wire
• Effective Date: 01-Feb-2013
• Referred By: ASTM B366/B366M-23 - Standard Specification for Factory-Made Wrought Nickel and Nickel Alloy Fittings
• Effective Date: 01-Nov-2007

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:B691 −02(Reapproved2007)
StandardSpecification for
Iron-Nickel-Chromium-Molybdenum Alloys (UNS N08366 and
UNS N08367) Rod, Bar, and Wire
This standard is issued under the fixed designation B691; 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
3.1 Definitions of Terms Specific to This Standard:
1.1 This specification covers iron-nickel-chromium-
3.1.1 The terms rod, bar, and wire, as used in this
molybdenum alloys (UNS N08366 and UNS N08367)* in the
specification, are described as follows:
form of hot-finished and cold-finished rounds, squares,
3.1.2 bar, n—hot-finished or cold-finished material of
hexagons, octagons, and rectangles.
round,square,hexagon,octagon,orrectangularsolidsectionin
1.2 The values stated in inch-pound units are to be regarded
straight lengths.
as the standard. The values given in parentheses are for
3.1.3 rod, n—hot-finished material of round, square,
information only.
hexagon, octagon, or rectangular solid section furnished in
1.3 The following safety hazards caveat pertains only to the
coils for subsequent cold drawing into finished products.
test methods portion, Section 12, of this specification: This
3.1.4 wire, n—cold-finished material of round, square,
standard does not purport to address all of the safety concerns,
hexagon, octagon, or rectangle solid section furnished in coils.
if any, associated with its use. It is the responsibility of the user
of this standard to become familiar with all hazards including
4. Ordering Information
those identified in the appropriate Material Safety Data Sheet
4.1 It is the responsibility of the purchaser to specify all
(MSDS) for this product/material as provided by the
requirements that are necessary for material ordered to this
manufacturer, to establish appropriate safety and health
specification. Examples of such requirements include, but are
practices, and determine the applicability of regulatory limi-
not limited to, the following:
tations prior to use.
4.1.1 Quantity (feet, metres, or number of pieces),
4.1.2 Form (rod, bar, wire),
2. Referenced Documents
4.1.3 Name of material or UNS number,
2.1 ASTM Standards:
4.1.4 Finish (see 8.2),
B880 Specification for General Requirements for Chemical
4.1.5 Dimensions, including length,
Check Analysis Limits for Nickel, Nickel Alloys and
4.1.6 Certification, if required (Section 15),
Cobalt Alloys
4.1.7 Purchaser’s inspection, if required (Section 13),
E8 Test Methods for Tension Testing of Metallic Materials
4.1.8 ASTM designation and year of issue, and
E29 Practice for Using Significant Digits in Test Data to
4.1.9 Samples for product analysis, if required.
Determine Conformance with Specifications
5. Chemical Composition
E1473 Test Methods for Chemical Analysis of Nickel,
Cobalt, and High-Temperature Alloys
5.1 The material shall conform to the composition limits
specified in Table 1.
5.2 If a product (check) analysis is made by the purchaser,
This specification is under the jurisdiction of ASTM Committee B02 on
the material shall conform to the permissible variations for
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
product (check) analysis in Specification B880.
B02.07 on Refined Nickel and Cobalt and Their Alloys.
Current edition approved Nov. 1, 2007. Published November 2007. Originally
approved in 1981. Last previous edition approved in 2002 as B691 – 02. DOI: 6. Mechanical Properties and Other Requirements
10.1520/B0691-02R07.
6.1 The material shall conform to the mechanical property
* New designation established in accordance withASTM E527 and SAE J1086,
Practice for Numbering Metals and Alloys. requirements specified in Table 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
7. Dimensions and Permissible Variations
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. 7.1 Size:
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
B691−02(Reapproved2007)
TABLE 1 Chemical Requirements
7.1.3 Hexagons and Octagons—The permissible variations
Composition Limits, % in size of cold-finished hexagons and octagons shall be as
Element
N08366 N08367 given in Table 5. For hot-finished bar and rod hexagons and
Carbon 0.035 max 0.030 max octagons they shall be as given in Table 6.
Manganese 2.00 max 2.00 max
7.1.4 Flats (Rectangles) —The permissible variations in
Silicon 1.00 max 1.00 max
width and thickness of cold-finished flats shall be as given in
Phosphorus 0.040 max 0.040 max
Sulfur 0.030 max 0.030 max
Table 7 for bars and for wire in Table 8. For hot-finished flat
Chromium 20.00 to 22.00 20.00 to 22.00
barsandrods,thetolerancesforwidthandthicknessshallbeas
Nickel 23.50 to 25.50 23.50 to 25.50
given in Table 9.
Molybdenum 6.00 to 7.00 6.00 to 7.00
Nitrogen . 0.18 to 0.25
A 7.2 Out-of-Round—Hot-finished rounds and cold-finished
Iron remainder remainder
rounds (except forging quality), all sizes, in straight lengths,
Copper . 0.75 max
A
shall not be out-of-round by more than shown in Table 4 and
Iron shall be determined arithmetically by difference.
Table 3.
7.3 Corners—Cold-finished squares, rectangles, hexagons
TABLE 2 Mechanical Properties
and octagons will have equal angles and sharp corners.
Cold-Finished-An-
nealed and Hot- Forging Quality
7.4 Machining Allowances—When the surfaces of hot-
Finished-Annealed (All Sizes)
finished material are to be machined, the allowances given in
(All Sizes)
Table 10 are recommended for normal machining operations.
N08366 N08367 N08366 N08367
7.5 Length:
AA
Tensile strength, min, 75 (517) 95 (655)
7.5.1 Unless multiple, nominal, or cut lengths are specified,
ksi (MPa)
AA
random mill lengths shall be furnished.
Yield strength, 0.2 % 30 (206) 45 (310)
offset, min, ksi (MPa)
7.5.2 When bars are ordered in multiple lengths, ⁄4 in. (6.4
AA
Elongation in 2 in. or 50 30 30
mm) will be allowed for each multiple cut, unless otherwise
mm, or 4D,min,%
specified.
A
No tensile properties are required on forging quality.
7.5.3 The permissible variations in length of hot or cold-
finished bars shall be as specified in Table 11 or Table 12
depending upon whether or not the material is specified to be
machine-cut after straightening.
7.1.1 Rounds—The permissible variations in size of cold-
7.6 Ends:
finished round shall be as given in Table 3. For hot-finished
7.6.1 Bars ordered to random or nominal lengths will be
round bars and rod, they shall be as given in Table 4.
furnished with either cropped or saw-cut ends.
7.1.2 Squares—The permissible variations in size of cold-
7.6.2 Bars ordered to cut lengths will be furnished with
finished square bars shall be as given in Table 5. For hot-
square saw-cut or machine cut ends.
finished square bars and rods, they shall be as given in Table 4.
7.7 Straightness:
7.7.1 The permissible variations in straightness of cold-
TABLE 3 Permissible Variations in Diameter Cold-Finished finished bars shall be as specified in Table 13.
Round Bars and Wire
7.7.2 The permissible variations in straightness of hot-
A,B,C
Diameter tolerance, in. (mm)
finished bars shall be as specified in Table 13.
Specified Diameter, in. (mm)
Plus and Minus
0.0030 (0.076) to 0.0048 (0.122), excl 0.0001 (0.003)
8. Workmanship, Finish, and Appearance
0.0048 (0.122) to 0.0080 (0.203), excl 0.0002 (0.005)
0.0080 (0.203) to 0.0120 (0.305), excl 0.0003 (0.008) 8.1 The material shall be uniform in quality and condition,
0.0120 (0.305) to 0.0240 (0.610), excl 0.0004 (0.010)
smooth, commercially straight or flat, and free of injurious
0.0240 (0.610) to 0.0330 (0.838), excl 0.0005 (0.013)
imperfections.
0.0330 (0.838) to 0.0440 (1.118), excl 0.0008 (0.020)
0.0440 (1.118) to 0.3125 (7.938), excl 0.001 (0.03)
8.2 Finishes available include hot-rolled, hot rolled-
0.3125 (7.938) to 0.5000 (12.700), excl 0.0015 (0.038)
0.5000 (12.700) to 1.000 (25.4), excl 0.002 (0.05) annealed-descaled, cold-drawn, ground, turned, and machined.
1.000 (25.40) to 1.500 (38.10), excl 0.0025 (0.06)
1.500 (38.10) to 4.000 (101.6), incl 0.003 (0.08)
9. Sampling
A
Diameter tolerances are over and under as shown in the above table. Also,
rounds can be produced to tolerances all over and nothing under, or all under and 9.1 Lot Definition:
nothing over, or any combination of over and under, if the total spread in diameter
9.1.1 A lot for chemical analysis shall consist of one heat.
tolerance for a specified diameter is not less than the total spread shown in the
table. 9.1.2 Lots for mechanical testing shall consist of the mate-
B
The maximum out-of-round tolerance for round wire is one-half of the total size
rial from one heat, in the same condition (temper), and of the
tolerance shown in the above table.
C same specified size (excepting length) and cross-section.
Whenitisnecessarytoheattreatorheattreatandpickleaftercoldfinishing,size
tolerancesaredoublethoseshowninthetableforsizes0.0240in.(0.610mm)and
9.2 Test Material Selection:
over.
9.2.1 Sampling for Chemical Analysis:
B691−02(Reapproved2007)
TABLE 4 Permissible Variations in Size of Hot-Finished Round and Square Bars and Rods
A
Permissible Variations from Specified Size, Out-of-Round or
B
Out-of-Square, in.
in. (mm)
Specified size, in. (mm)
(mm)
Plus Minus
1 5
⁄4 (6.4) to ⁄16 (7.9), incl 0.005 (0.13) 0.005 (0.13) 0.008 (0.20)
5 7
Over ⁄16 (7.9) to ⁄16 (11.1), incl 0.006 (0.15) 0.006 (0.15) 0.009 (0.23)
7 5
Over ⁄16 (11.1) to ⁄8 (15.9), incl 0.007 (0.18) 0.007 (0.18) 0.010 (0.25)
5 7
Over ⁄8 (15.9) to ⁄8 (22.2), incl 0.008 (0.20) 0.008 (0.20) 0.012 (0.30)
Over ⁄8 (22.2) to 1 (25.4), incl 0.009 (0.23) 0.009 (0.23) 0.013 (0.33)
Over 1 (25.4) to 1 ⁄8 (28.6), incl 0.010 (0.25) 0.010 (0.25) 0.015 (0.38)
1 1
Over 1 ⁄8 (28.6) to 1 ⁄4 (31.8), incl 0.011 (0.28) 0.011 (0.28) 0.016 (0.41)
1 3
Over 1 ⁄4 (31.8) to 1 ⁄8 (34.9), incl 0.012 (0.30) 0.012 (0.30) 0.018 (0.46)
3 1
Over 1 ⁄8 (34.9) to 1 ⁄2 (38.1), incl 0.014 (0.36) 0.014 (0.36) 0.021 (0.53)
1 1 1
Over 1 ⁄2 (38.1) to 2 (50.8), incl ⁄64 (0.4) ⁄64 (0.4) 0.023 (0.58)
1 1
Over 2 (50.8) to 2 ⁄2 (63.5), incl ⁄32 (0.8) 0 0.023 (0.58)
1 1 3
Over 2 ⁄2 (63.5) to 3 ⁄2 (88.9), incl ⁄64 (1.2) 0 0.035 (0.89)
1 1 1
Over 3 ⁄2 (88.9) to 4 ⁄2 (114.3), incl ⁄16 (1.6) 0 0.046 (1.17)
1 1 5
Over 4 ⁄2 (114.3) to 5 ⁄2 (139.7), incl ⁄64 (2.0) 0 0.058 (1.47)
1 1 1
Over 5 ⁄2 (139.7) to 6 ⁄2 (165.1), incl ⁄8 (3.2) 0 0.070 (1.78)
1 5
Over 6 ⁄2 (165.1) to 8 (203.2), incl ⁄32 (4.0) 0 0.085 (2.16)
A
Out-of-round is the difference between the maximum and minimum diameters of the bar, measured at the same cross section.
B
Out-of-square section is the difference in the two dimensions at the same cross section of a square bar, each dimension being the distance between opposite faces.
TABLE 5 Permissible Variations in Distance Between Parallel
Surfaces of Cold Finished Hexagonal, Octagonal, and Square
Bars and Wire
Permissible Variations from Specified
Size, in.
Specified Size, in. (mm) A
(mm)
Plus Minus
0.125 (3.18) to 0.3125 (7.938), excl 0 0.002 (0.05)
0.3125 (7.938) to 0.500 (12.70), excl 0 0.003 (0.08)
0.500 (12.70) to 1.000 (25.40), incl 0 0.004 (0.10)
Over 1 (25.40) to 2 (50.80), incl 0 0.006 (0.15)
Over 2 (50.80) to 3 (76.20), incl 0 0.008 (0.20)
Over 3 (76.20) 0 0.010 (0.25)
A
Whenitisnecessarytoheattreatorheattreatandpickleaftercoldfinishing,size
tolerances are double those shown in the table.
TABLE 6 Permissible Variations in Size of Hot-Finished Hexagonal and Octagonal Bars and Rods
Permissible Variations from Specified Size, Maximum Difference,
Specified Sizes Measured Between Opposite in. (mm) in. (mm), 3 Measure-
Sides, in. (mm) ments for Hexagons
Plus Minus
Only
1 1
⁄4 to ⁄2 (6.4 to 12.7), incl 0.007 (0.18) 0.007 (0.18) 0.011 (0.28)
Over ⁄2 to 1 (12.7) to (25.4), incl 0.010 (0.25) 0.010 (0.25) 0.015 (0.38)
Over 1 (25.4) to 1 ⁄2 (38.1), incl 0.021 (0.53) 0.021 (0.53) 0.025 (0.64)
1 1 1 1
Over 1 ⁄2 (38.1) to 2 (50.8), incl ⁄32 (0.8) ⁄32 (0.8) ⁄32 (0.8)
1 3 3 3
Over 2 (50.8) to 2 ⁄2 (63.5), incl ⁄64 (1.2) ⁄64 (1.2) ⁄64 (1.2)
1 1 1 1 1
Over 2 ⁄2 (63.5) to 3 ⁄2 (88.9), incl ⁄16 (1.6) ⁄16 (1.6) ⁄16 (1.6)
9.2.1.1 An analysis of each lot shall be made by the 10. Number of Tests and Retests
manufacturer from a representative sample obtained during the
10.1 Chemical Analysis—One test per lot.
pouring of the heat or subsequent processing.
9.2.1.2 If samples for product (check) analysis are specified,
10.2 Mechanical Tests and Tension Tests—One test per lot.
a representative sample shall be taken from each lot of finished
10.3 Retests—If the specimen used in the mechanical test of
material.
any lot fails to meet the specified requirements, an additional
9.2.2 Sampling for Mechanical Testing—Samples of the
specimen shall be taken from a different sample piece and
material to provide test specimens for mechanical testing shall
tested.The results of this test specimen shall meet the specified
be taken from such locations in each lot (see 9.1.2)astobe
requirements.
representative of that lot.
B691−02(Reapproved2007)
TABLE 7 Permissible Variations in Width and Thickness of Cold-
Finished Flat Bars
Width Tolerance, in. (mm),
A
Plus and Minus
For Thick- For Thick-
Width, in. (mm)
nesses 0.250 nesses Over
in. (6.35) and 0.250 in.
Under (6.35)
0.375 (9.53) to 1 (25.40), incl 0.004 (0.10) 0.002 (0.05)
Over 1 (25.40) to 2 (50.80), incl 0.006 (0.15) 0.003 (0.08)
Over 2 (50.80) to 3 (76.20), incl 0.008 (0.20) 0.004 (0.10)
Over 3 (76.20) to 4.500 (114.30), 0.010 (0.25) 0.005 (0.13)
B
incl
Thickness
Tolerance, in.
Thickness, in. (mm)
(mm), Plus
A
and Minus
0.125 (3.18) to 1 (25.40), incl 0.002 (0.05)
Over 1 (25.40) to 2 (50.80), incl 0.003 (0.08)
Over 2 (50.80) to 3 (76.20), incl 0.004 (0.10)
Over 3 (76.20) to 4.500 (114.30), 0.005 (0.13)
B
incl
A
When it is necessary to heat treat or heat treat and pickle after cold finishing,
tolerances are double those shown in the table.
B
Cold-finished flat bars over 4.500 in. (114.3 mm) wide or thick are produced:
width and thickness tolerances for such bars are not included herein.
A
TABLE 8 Permissible Variations in Width and Thickness of Cold-Finished Flat Coils
Permissible Variations
Permissible Variations in Thickness, in. (mm),
in Width, in. (mm), for Given
Plus and Minus, for Given Thicknesses, in. (mm)
Width, in. (mm)
Specified Width, in. (mm)
0.035 (0.89) to
Under 0.029 0.029 (0.74) to
0.1875 (
...

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:B691–95 Designation: B 691 – 02 (Reapproved 2007)
Standard Specification for
Iron-Nickel-Chromium-Molybdenum Alloys (UNS N08366 and
UNS N08367) Rod, Bar, and Wire
This standard is issued under the fixed designation B 691; 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.
1. Scope
1.1 This specification covers iron-nickel-chromium-molybdenum alloys (UNS N08366 and UNS N08367)* in the form of
hot-finished and cold-finished rounds, squares, hexagons, octagons, and rectangles.
1.2 The values stated in inch-pound units are to be regarded as the standard.The values given in parentheses are for information
only.
1.3 Thefollowingsafetyhazardscaveatpertainsonlytothetestmethodsportion,Section12,ofthisspecification: This standard
does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this
standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the
user of this standard to become familiar with all hazards including those identified in the appropriate Material Safety Data Sheet
(MSDS) for this product/material as provided by the manufacturer, to establish appropriate safety and health practices, and
determine the applicability of regulatory limitations prior to use.
2. Referenced Documents
2.1 ASTM Standards:
B 880 SpecificationforGeneralRequirementsforChemicalCheckAnalysisLimitsforNickel,NickelAlloysandCobaltAlloys
E 8 Test Methods for Tension Testing of Metallic Materials
E 29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E140Hardness Conversion Tables for Metals (Relationship Between Brinell Hardness, Vickers Hardness, Rockwell Hardness,
Rockwell Superficial Hardness, and Knoop Hardness)
E 1473 Test Methods for Chemical Analysis of Nickel, Cobalt, and High-Temperature Alloys
3. Terminology
3.1 Definitions of Terms Specific to This Standard: 3.1.1TheThe terms rod, bar, and wire, as used in this specification, are
described as follows:
3.1.1.13.1.1 bar, n—hot-finished or cold-finished material of round, square, hexagon, octagon, or rectangular solid section in
straight lengths.
3.1.1.2rod
3.1.2 rod, n—hot-finished material of round, square, hexagon, octagon, or rectangular solid section furnished in coils for
subsequent cold drawing into finished products.
3.1.1.3wire
3.1.3 wire, n—cold-finished material of round, square, hexagon, octagon, or rectangle solid section furnished in coils.
4. Ordering Information
4.1Orders for material under this specification shall include the following information, as required: Ordering Information
4.1 It is the responsibility of the purchaser to specify all requirements that are necessary for material ordered to this
ThisspecificationisunderthejurisdictionofASTMCommitteeB-2onNonferrousMetalsandAlloysandisthedirectresponsibilityofSubcommitteeB02.07onRefined
Nickel and Cobalt, and Alloys Containing Nickel or Cobalt, or Both, as Principal Constituents.
Current edition approved Aug. 15, 1995. Published October 1995. Originally published as B691–81. Last previous edition B691–94.
ThisspecificationisunderthejurisdictionofASTMCommitteeB02onNonferrousMetalsandAlloysandisthedirectresponsibilityofSubcommitteeB02.07onRefined
Nickel and Cobalt and Their Alloys.
Current edition approved Nov. 1, 2007. Published November 2007. Originally approved in 1981. Last previous edition approved in 2002 as B 691 – 02.
* New designation established in accordance with ASTM E 527 and SAE J1086, Practice for Numbering Metals and Alloys.
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
, Vol 03.01.volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
B 691 – 02 (2007)
specification. Examples of such requirements include, but are not limited to, the following:
4.1.1 Quantity (feet, metres, or number of pieces),
4.1.2 Form (rod, bar, wire),
4.1.3 Name of material or UNS number,
4.1.4 Finish (see 8.2),
4.1.5 Dimensions, including length,
4.1.6 Certification, if required (Section 15),
4.1.7 Purchaser’s inspection, if required (Section 13),
4.1.8 ASTM designation and year of issue, and
4.1.9 Samples for product analysis, if required.
5. Chemical Composition
5.1 The material shall conform to the composition limits specified in Table 1.
5.2 If a product (check) analysis is made by the purchaser, the material shall conform to the permissible variations for product
(check) analysis in Table 1Specification B 880.
6. Mechanical Properties and Other Requirements
6.1The6.1 The material shall conform to the mechanical property requirements specified in Table 2.
7. Dimensions and Permissible Variations
7.1 Size:
7.1.1 Rounds—Thepermissiblevariationsinsizeofcold-finishedroundshallbeasgiveninTable3.Forhot-finishedroundbars
and rod, they shall be as given in Table 4.
7.1.2 Squares—The permissible variations in size of cold-finished square bars shall be as given in Table 5. For hot-finished
square bars and rods, they shall be as given in Table 4.
7.1.3 Hexagons and Octagons—The permissible variations in size of cold-finished hexagons and octagons shall be as given in
Table 5. For hot-finished bar and rod hexagons and octagons they shall be as given in Table 6.
TABLE 1 Chemical Requirements
Composition Limits, %Product (Check)
Analysis Vari-
ations, under
min or over
Element
max, of the
Specified Limit
of Element, %
N08366 N08367
Carbon 0.035 max 0.030
max 0.005
Carbon 0.035 max 0.030 max
Manganese 2.00 max 2.00 max0.04
Manganese 2.00 max 2.00 max
Silicon 1.00 max 1.00 max0.05
Silicon 1.00 max 1.00 max
Phosphorus 0.040 max 0.040
max 0.005
Phosphorus 0.040 max 0.040 max
Sulfur 0.030 max 0.030
max 0.005
Sulfur 0.030 max 0.030 max
Chromium 20.00 to 22.00 20.00 to
22.000.25
Chromium 20.00 to 22.00 20.00 to 22.00
Nickel 23.50 to 25.50 23.50 to
25.500.20
Nickel 23.50 to 25.50 23.50 to 25.50
Molybdenum 6.00 to 7.00 6.00 to
7.000.15
Molybdenum 6.00 to 7.00 6.00 to 7.00
Nitrogen . 0.18 to
0.250.01
Nitrogen . 0.18 to 0.25
A
Iron remainder remainder
Copper . 0.75 max0.04
Copper . 0.75 max
A
Iron shall be determined arithmetically by difference.
B 691 – 02 (2007)
TABLE 2 Mechanical Properties
Cold-Finished-An-
nealed and Hot- Forging Quality
Finished-Annealed (All Sizes)
(All Sizes)
N08366 N08367 N08366 N08367
AA
Tensile strength, min, 75 (517) 95 (655)
ksi (MPa)
AA
Yield strength, 0.2 % 30 (206) 45 (310)
offset, min, ksi (MPa)
AA
Elongation in 2 in. or 50 30 30
mm, or 4D,min,%
A
No tensile properties are required on forging quality.
TABLE 3 Permissible Variations in Diameter Cold- Finished
Round Bars and Wire
Diameter toler-
A,B,C
ance, in. (mm)
Specified Diameter, in. (mm)
Plus and Minus
0.0030 (0.076) to 0.0048 (0.122), excl 0.0001 (0.003)
0.0048 (0.122) to 0.0080 (0.203), excl 0.0002 (0.005)
0.0080 (0.203) to 0.0120 (0.305), excl 0.0003 (0.008)
0.0120 (0.305) to 0.0240 (0.610), excl 0.0004 (0.010)
0.0240 (0.610) to 0.0330 (0.838), excl 0.0005 (0.013)
0.0330 (0.838) to 0.0440 (1.118), excl 0.0008 (0.020)
0.0440 (1.118) to 0.3125 (7.938), excl 0.001 (0.03)
0.3125 (7.938) to 0.5000 (12.700), excl 0.0015 (0.038)
0.5000 (12.700) to 1.000 (25.4), excl 0.002 (0.05)
1.000 (25.40) to 1.500 (38.10), excl 0.0025 (0.06)
1.500 (38.10) to 4.000 (101.6), incl 0.003 (0.08)
A
Diameter tolerances are over and under as shown in the above table. Also,
rounds can be produced to tolerances all over and nothing under, or all under and
nothing over, or any combination of over and under, if the total spread in diameter
tolerance for a specified diameter is not less than the total spread shown in the
table.
B
Themaximumout-of-roundtoleranceforroundwireisone-halfofthetotalsize
tolerance shown in the above table.
C
When it is necessary to heat treat or heat treat and pickle after cold finishing,
sizetolerancesaredoublethoseshowninthetableforsizes0.0240in.(0.610mm)
and over.
TABLE 4 Permissible Variations in Size of Hot-Finished Round and Square Bars and Rods
A
Permissible Variations from Specified Size, Out-of-Round or
B
in. (mm) Out-of-Square, in.
Specified size, in. (mm)
(mm)
Plus Minus
1 5
⁄4 (6.4) to ⁄16 (7.9), incl 0.005 (0.13) 0.005 (0.13) 0.008 (0.20)
5 7
Over ⁄16 (7.9) to ⁄16 (11.1), incl 0.006 (0.15) 0.006 (0.15) 0.009 (0.23)
7 5
Over ⁄16 (11.1) to ⁄8 (15.9), incl 0.007 (0.18) 0.007 (0.18) 0.010 (0.25)
5 7
Over ⁄8 (15.9) to ⁄8 (22.2), incl 0.008 (0.20) 0.008 (0.20) 0.012 (0.30)
Over ⁄8 (22.2) to 1 (25.4), incl 0.009 (0.23) 0.009 (0.23) 0.013 (0.33)
Over 1 (25.4) to 1 ⁄8 (28.6), incl 0.010 (0.25) 0.010 (0.25) 0.015 (0.38)
1 1
Over 1 ⁄8 (28.6) to 1 ⁄4 (31.8), incl 0.011 (0.28) 0.011 (0.28) 0.016 (0.41)
1 3
Over 1 ⁄4 (31.8) to 1 ⁄8 (34.9), incl 0.012 (0.30) 0.012 (0.30) 0.018 (0.46)
3 1
Over 1 ⁄8 (34.9) to 1 ⁄2 (38.1), incl 0.014 (0.36) 0.014 (0.36) 0.021 (0.53)
1 1 1
Over 1 ⁄2 (38.1) to 2 (50.8), incl ⁄64 (0.4) ⁄64 (0.4) 0.023 (0.58)
1 1
Over 2 (50.8) to 2 ⁄2 (63.5), incl ⁄32 (0.8) 0 0.023 (0.58)
1 1 3
Over 2 ⁄2 (63.5) to 3 ⁄2 (88.9), incl ⁄64 (1.2) 0 0.035 (0.89)
1 1 1
Over 3 ⁄2 (88.9) to 4 ⁄2 (114.3), incl ⁄16 (1.6) 0 0.046 (1.17)
1 1 5
Over 4 ⁄2 (114.3) to 5 ⁄2 (139.7), incl ⁄64 (2.0) 0 0.058 (1.47)
1 1 1
Over 5 ⁄2 (139.7) to 6 ⁄2 (165.1), incl ⁄8 (3.2) 0 0.070 (1.78)
1 5
Over 6 ⁄2 (165.1) to 8 (203.2), incl ⁄32 (4.0) 0 0.085 (2.16)
A
Out-of-round is the difference between the maximum and minimum diameters of the bar, measured at the same cross section.
B
Out-of-square section is the difference in the two dimensions at the same cross section of a square bar, each dimension being the distance between opposite faces.
7.1.4 Flats (Rectangles)—The permissible variations in width and thickness of cold-finished flats shall be as given in Table 7
for bars and for wire inTable 8. For hot-finished flat bars and rods, the tolerances for width and thickness shall be as given inTable
9.
7.2 Out-of-Round—Hot-finished rounds and cold-finished rounds (except forging quality), all sizes, in straight lengths, shall not
be out-of-round by more than shown in Table 4 and Table 3.
B 691 – 02 (2007)
TABLE 5 Permissible Variations in Distance Between Parallel
Surfaces of Cold Finished Hexagonal, Octagonal, and Square
Bars and Wire
Permissible Varia-
tions from Speci-
fied Size, in.
Specified Size, in. (mm)
A
(mm)
Plus Minus
0.125 (3.18) to 0.3125 (7.938), excl 0 0.002 (0.05)
0.3125 (7.938) to 0.500 (12.70), excl 0 0.003 (0.08)
0.500 (12.70) to 1.000 (25.40), incl 0 0.004 (0.10)
Over 1 (25.40) to 2 (50.80), incl 0 0.006 (0.15)
Over 2 (50.80) to 3 (76.20), incl 0 0.008 (0.20)
Over 3 (76.20) 0 0.010 (0.25)
A
When it is necessary to heat treat or heat treat and pickle after cold finishing,
size tolerances are double those shown in the table.
TABLE 6 Permissible Variations in Size of Hot-Finished Hexagonal and Octagonal Bars and Rods
Permissible Variations from Specified Size, Maximum Difference,
Specified Sizes Measured Between Opposite in. (mm) in. (mm), 3 Measure-
Sides, in. (mm) ments for Hexagons
Plus Minus
Only
1 1
⁄4 to ⁄2 (6.4 to 12.7), incl 0.007 (0.18) 0.007 (0.18) 0.011 (0.28)
Over ⁄2 to 1 (12.7) to (25.4), incl 0.010 (0.25) 0.010 (0.25) 0.015 (0.38)
Over 1 (25.4) to 1 ⁄2 (38.1), incl 0.021 (0.53) 0.021 (0.53) 0.025 (0.64)
1 1 1 1
Over 1 ⁄2 (38.1) to 2 (50.8), incl ⁄32 (0.8) ⁄32 (0.8) ⁄32 (0.8)
1 3 3 3
Over 2 (50.8) to 2 ⁄2 (63.5), incl ⁄64 (1.2) ⁄64 (1.2) ⁄64 (1.2)
1 1 1 1 1
Over 2 ⁄2 (63.5) to 3 ⁄2 (88.9), incl ⁄16 (1.6) ⁄16 (1.6) ⁄16 (1.6)
TABLE 7 Permissible Variations in Width and Thickness of Cold-
Finished Flat Bars
Width Tolerance, in. (mm),
A
Plus and Minus
For Thick- For Thick-
Width, in. (mm)
nesses 0.250 nesses Over
in. (6.35) and 0.250 in.
Under (6.35)
0.375 (9.53) to 1 (25.40), incl 0.004 (0.10) 0.002 (0.05)
Over 1 (25.40) to 2 (50.80), incl 0.006 (0.15) 0.003 (0.08)
Over 2 (50.80) to 3 (76.20), incl 0.008 (0.20) 0.004 (0.10)
Over 3 (76.20) to 4.500 (114.30), 0.010 (0.25) 0.005 (0.13)
B
incl
Thickness
Tolerance, in.
Thickness, in. (mm)
(mm), Plus
A
and Minus
0.125 (3.18) to 1 (25.40), incl 0.002 (0.05)
Over 1 (25.40) to 2 (50.80), incl 0.003 (0.08)
Over 2 (50.80) to 3 (76.20), incl 0.004 (0.10)
Over 3 (76.20) to 4.500 (114.30), 0.005 (0.13)
B
incl
A
When it is necessary to heat treat or heat treat and pickle after cold finishing,
tolerances are double those shown in the table.
B
Cold-finished flat bars over 4.500 in. (114.3 mm) wide or thick are produced:
width and thickness tolerances for such bars are not included herein.
7.3 Corners—Cold-finished squares, rectangles, hexagons and octagons will have equal angles and sharp corners.
7.4 Machining Allowances—When the surfaces of hot-finished material are to be machined, the allowances given in Table 10
are recommended for normal machining operations.
7.5 Length:
7.5.1 Unless multiple, nominal, or cut lengths are specified, random mill lengths shall be furnished.
7.5.2 When bars are ordered in multiple lengths, ⁄4 in. (6.4 mm) will be allowed for each multiple cut, unless otherwise
specified.
7.5.3 The permissible variations in length of hot or cold-finished bars shall be as specified in Table 11 or Table 12 depending
upon whether or not the material is specified to be machine-cut after straightening.
7.6 Ends:
B 691 – 02 (2007)
A
TABLE 8 Permissible Variations in Width and Thickness of Cold-Finished Flat Coils
Permissible Variations
Permissible Variations in Thickness, in. (mm),
in Width, in. (mm), for Given
Plus and Minus, for Given Thicknesses, in. (mm)
Width, in. (mm)
Specified Width, in. (mm)
0.035 (0.89) to
Under 0.029 0.029 (0.74) to
0.1875 (4.76), Plus Minus
(0.74) 0.035 (0.89), excl
excl
0.0625 (1.588) to 0.375 (9.52), excl 0.001 (0.03) 0.0015 (0.038) 0.002 (0.05) 0.005 (0.13) 0.005 (0.13)
A
Where it is necessary to heat treat or heat tre
...