ASTM B691-18
(Specification)Standard Specification for Iron-Nickel-Chromium-Molybdenum Alloy (UNS N08367) Rod, Bar, and Wire
Standard Specification for Iron-Nickel-Chromium-Molybdenum Alloy (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 alloy (UNS N08367)2 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 standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
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 Safety Data Sheet (SDS) for this product/material as provided by the manufacturer, to establish appropriate safety, health, and environmental practices, and determine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
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Buy Standard
Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:B691 −18
Standard Specification for
Iron-Nickel-Chromium-Molybdenum Alloy (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* E8/E8M Test Methods for Tension Testing of Metallic Ma-
terials
1.1 This specification covers iron-nickel-chromium-
2 E29 Practice for Using Significant Digits in Test Data to
molybdenum alloy (UNS N08367) in the form of hot-finished
Determine Conformance with Specifications
and cold-finished rounds, squares, hexagons, octagons, and
E1473 Test Methods for Chemical Analysis of Nickel, Co-
rectangles.
balt and High-Temperature Alloys
1.2 The values stated in inch-pound units are to be regarded
as standard. The values given in parentheses are mathematical
3. Terminology
conversions to SI units that are provided for information only
3.1 Definitions of Terms Specific to This Standard:
and are not considered standard.
3.1.1 The terms rod, bar, and wire, as used in this
1.3 The following safety hazards caveat pertains only to the
specification, are described as follows:
test methods portion, Section 12, of this specification: This
3.1.2 bar, n—hot-finished or cold-finished material of
standard does not purport to address all of the safety concerns,
round,square,hexagon,octagon,orrectangularsolidsectionin
if any, associated with its use. It is the responsibility of the user
straight lengths.
of this standard to become familiar with all hazards including
3.1.3 rod, n—hot-finished material of round, square,
those identified in the appropriate Safety Data Sheet (SDS) for
hexagon, octagon, or rectangular solid section furnished in
this product/material as provided by the manufacturer, to
coils for subsequent cold drawing into finished products.
establish appropriate safety, health, and environmental
practices, and determine the applicability of regulatory limi-
3.1.4 wire, n—cold-finished material of round, square,
tations prior to use.
hexagon, octagon, or rectangle solid section furnished in coils.
1.4 This international standard was developed in accor-
dance with internationally recognized principles on standard-
4. Ordering Information
ization established in the Decision on Principles for the
4.1 It is the responsibility of the purchaser to specify all
Development of International Standards, Guides and Recom-
requirements that are necessary for material ordered to this
mendations issued by the World Trade Organization Technical
specification. Examples of such requirements include, but are
Barriers to Trade (TBT) Committee.
not limited to, the following:
2. Referenced Documents 4.1.1 Quantity (feet, meters, or number of pieces),
4.1.2 Form (rod, bar, wire),
2.1 ASTM Standards:
4.1.3 Name of material or UNS number,
B880 Specification for General Requirements for Chemical
4.1.4 Finish (see 8.2),
Check Analysis Limits for Nickel, Nickel Alloys and
4.1.5 Dimensions, including length,
Cobalt Alloys
4.1.6 Purchaser’s inspection, if required (Section 13),
4.1.7 ASTM designation and year of issue, and
This specification is under the jurisdiction of ASTM Committee B02 on
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee 4.1.8 Samples for product analysis, if required.
B02.07 on Refined Nickel and Cobalt and Their Alloys.
Current edition approved Nov. 1, 2018. Published January 2019. Originally
5. Chemical Composition
approved in 1981. Last previous edition approved in 2013 as B691 – 02 (2013).
DOI: 10.1520/B0691-18.
5.1 The material shall conform to the composition limits
Designation established in accordance with ASTM E527 and SAE J1086,
specified in Table 1.
Practice for Numbering Metals and Alloys.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.2 If a product (check) analysis is made by the purchaser,
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
the material shall conform to the permissible variations for
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. product (check) analysis in Specification B880.
*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
B691−18
TABLE 1 Chemical Requirements TABLE 3 Permissible Variations in Diameter Cold-Finished
Round Bars and Wire
Composition Limits, %
Element
A,B,C
Diameter tolerance, in. (mm)
N08367
Specified Diameter, in. (mm)
Plus and Minus
Carbon 0.030 max
Manganese 2.00 max
0.0030 (0.076) to 0.0048 (0.122), excl 0.0001 (0.003)
Silicon 1.00 max
0.0048 (0.122) to 0.0080 (0.203), excl 0.0002 (0.005)
Phosphorus 0.040 max
0.0080 (0.203) to 0.0120 (0.305), excl 0.0003 (0.008)
Sulfur 0.030 max
0.0120 (0.305) to 0.0240 (0.610), excl 0.0004 (0.010)
Chromium 20.00 to 22.00
0.0240 (0.610) to 0.0330 (0.838), excl 0.0005 (0.013)
Nickel 23.50 to 25.50
0.0330 (0.838) to 0.0440 (1.118), excl 0.0008 (0.020)
Molybdenum 6.00 to 7.00
0.0440 (1.118) to 0.3125 (7.938), excl 0.001 (0.03)
Nitrogen 0.18 to 0.25
0.3125 (7.938) to 0.5000 (12.700), excl 0.0015 (0.038)
A
Iron remainder
0.5000 (12.700) to 1.000 (25.4), excl 0.002 (0.05)
Copper 0.75 max 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
Iron shall be determined arithmetically by difference.
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.
6. Mechanical Properties and Other Requirements
B
The maximum out-of-round tolerance for round wire is one-half of the total size
tolerance shown in the above table.
6.1 The material shall conform to the mechanical property
C
Whenitisnecessarytoheattreatorheattreatandpickleaftercoldfinishing,size
requirements specified in Table 2.
tolerancesaredoublethoseshowninthetableforsizes0.0240in.(0.610mm)and
over.
7. Dimensions and Permissible Variations
7.1 Size:
7.1.1 Rounds—The permissible variations in size of cold-
7.4 Machining Allowances—When the surfaces of hot-
finished round shall be as given in Table 3. For hot-finished
finished material are to be machined, the allowances given in
round bars and rod, they shall be as given in Table 4.
Table 10 are recommended for normal machining operations.
7.1.2 Squares—The permissible variations in size of cold-
finished square bars shall be as given in Table 5. For hot-
7.5 Length:
finished square bars and rods, they shall be as given in Table 4.
7.5.1 Unless multiple, nominal, or cut lengths are specified,
7.1.3 Hexagons and Octagons—The permissible variations
random mill lengths shall be furnished.
in size of cold-finished hexagons and octagons shall be as
7.5.2 When bars are ordered in multiple lengths, ⁄4 in. (6.4
given in Table 5. For hot-finished bar and rod hexagons and
mm) will be allowed for each multiple cut, unless otherwise
octagons they shall be as given in Table 6.
specified.
7.1.4 Flats (Rectangles) —The permissible variations in
7.5.3 The permissible variations in length of hot or cold-
width and thickness of cold-finished flats shall be as given in
finished bars shall be as specified in Table 11 or Table 12
Table 7 for bars and for wire in Table 8. For hot-finished flat
depending upon whether or not the material is specified to be
barsandrods,thetolerancesforwidthandthicknessshallbeas
machine-cut after straightening.
given in Table 9.
7.6 Ends:
7.2 Out-of-Round—Hot-finished rounds and cold-finished
7.6.1 Bars ordered to random or nominal lengths will be
rounds (except forging quality), all sizes, in straight lengths,
furnished with either cropped or saw-cut ends.
shall not be out-of-round by more than shown in Table 4 and
7.6.2 Bars ordered to cut lengths will be furnished with
Table 3.
square saw-cut or machine cut ends.
7.3 Corners—Cold-finished squares, rectangles, hexagons
7.7 Straightness:
and octagons will have equal angles and sharp corners.
7.7.1 The permissible variations in straightness of cold-
finished bars shall be as specified in Table 13.
7.7.2 The permissible variations in straightness of hot-
finished bars shall be as specified in Table 13.
TABLE 2 Mechanical Properties
Cold-Finished-
8. Workmanship, Finish, and Appearance
Annealed and
Forging Quality
Hot-Finished-
(All Sizes)
8.1 The material shall be uniform in quality and condition,
Annealed
(All Sizes) smooth, commercially straight or flat, and free of injurious
N08367 N08367 imperfections.
A
Tensile strength, min, 95 (655)
8.2 Finishes available include hot-rolled, hot rolled-
ksi (MPa)
A
annealed-descaled, cold-drawn, ground, turned, and machined.
Yield strength, 0.2 % 45 (310)
offset, min, ksi (MPa)
A
Elongation in 2 in. or 50 30
9. Sampling
mm, or 4D,min,%
A 9.1 Lot Definition:
No tensile properties are required on forging quality.
9.1.1 A lot for chemical analysis shall consist of one heat.
B691−18
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)
9.1.2 Lots for mechanical testing shall consist of the mate- 9.2.2 Sampling for Mechanical Testing—Samples of the
rial from one heat, in the same condition (temper), and of the material to provide test specimens for mechanical testing shall
same specified size (excepting length) and cross-section. be taken from such locations in each lot (see 9.1.2)astobe
representative of that lot.
9.2 Test Material Selection:
9.2.1 Sampling for Chemical Analysis:
10. Number of Tests and Retests
9.2.1.1 An analysis of each lot shall be made by the
manufacturer from a representative sample obtained during the
10.1 Chemical Analysis—One test per lot.
pouring of the heat or subsequent processing.
10.2 Mechanical Tests and Tension Tests—One test per lot.
9.2.1.2 If samples for product (check) analysis are specified,
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
B691−18
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
P
...
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 − 02 (Reapproved 2013) B691 − 18
Standard Specification for
Iron-Nickel-Chromium-Molybdenum Alloys (UNS N08366 and
UNS Alloy (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 Scope*
1.1 This specification covers iron-nickel-chromium-molybdenum alloysalloy (UNS N08366N08367) 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 standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
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)(SDS) for this product/material as provided by the manufacturer, to establish appropriate safety safety, health, and
healthenvironmental practices, and determine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
B880 Specification for General Requirements for Chemical Check Analysis Limits for Nickel, Nickel Alloys and Cobalt Alloys
E8E8/E8M Test Methods for Tension Testing of Metallic Materials [Metric] E0008_E0008M
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E1473 Test Methods for Chemical Analysis of Nickel, Cobalt and High-Temperature Alloys
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 The terms rod, bar, and wire, as used in this specification, are described as follows:
3.1.2 bar, n—hot-finished or cold-finished material of round, square, hexagon, octagon, or rectangular solid section in straight
lengths.
3.1.3 rod, n—hot-finished material of round, square, hexagon, octagon, or rectangular solid section furnished in coils for
subsequent cold drawing into finished products.
3.1.4 wire, n—cold-finished material of round, square, hexagon, octagon, or rectangle solid section furnished in coils.
4. Ordering Information
4.1 It is the responsibility of the purchaser to specify all requirements that are necessary for material ordered to this
specification. Examples of such requirements include, but are not limited to, the following:
4.1.1 Quantity (feet, metres,meters, or number of pieces),
This specification is under the jurisdiction of ASTM Committee B02 on Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee B02.07 on Refined
Nickel and Cobalt and Their Alloys.
Current edition approved Feb. 1, 2013Nov. 1, 2018. Published February 2013January 2019. Originally approved in 1981. Last previous edition approved in 20072013 as
B691 – 02 (2007).(2013). DOI: 10.1520/B0691-02R13.10.1520/B0691-18.
* New designation established in accordance with ASTM E527 and SAE J1086, Practice for Numbering Metals and Alloys.
Designation established in accordance with ASTM E527 and SAE J1086, Practice for Numbering Metals and Alloys.
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’sstandard’s Document Summary page on the ASTM website.
*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
B691 − 18
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),
4.1.6 Purchaser’sPurchaser’s inspection, if required (Section 13),
4.1.7 ASTM designation and year of issue, and
4.1.8 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 Specification B880.
6. Mechanical Properties and Other Requirements
6.1 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—The permissible variations in size of cold-finished round shall be as given in Table 3. For hot-finished round bars
and rod, they shall be as given in Table 4.
TABLE 1 Chemical Requirements
Composition
Limits, %
Element
N08366
N08367
Carbon 0.035 max
0.030 max
Manganese 2.00 max
2.00 max
Silicon 1.00 max
1.00 max
Phosphorus 0.040 max
0.040 max
Sulfur 0.030 max
0.030 max
Chromium 20.00 to 22.00
20.00 to 22.00
Nickel 23.50 to 25.50
23.50 to 25.50
Molybdenum 6.00 to 7.00
6.00 to 7.00
Nitrogen .
0.18 to 0.25
A
Iron remainder
remainder
Copper .
0.75 max
TABLE 1 Chemical Requirements
Composition
Limits, %
Element
N08367
Carbon 0.030 max
Manganese 2.00 max
Silicon 1.00 max
Phosphorus 0.040 max
Sulfur 0.030 max
Chromium 20.00 to 22.00
Nickel 23.50 to 25.50
Molybdenum 6.00 to 7.00
Nitrogen 0.18 to 0.25
A
Iron remainder
Copper 0.75 max
A
Iron shall be determined arithmetically by difference.
B691 − 18
TABLE 2 Mechanical Properties
Cold-Finished-
An-
Forging
nealed and Hot-
Quality
Finished-
(All Sizes)
Annealed
(All Sizes)
N08366 N08367 N08366 N08367
A A
Tensile strength, min, 75 (517) 95 (655)
ksi (MPa)
A A
Yield strength, 0.2 % 30 (206) 45 (310)
offset, min, ksi (MPa)
A A
Elongation in 2 in. or 50 30 30
mm, or 4D, min, %
TABLE 2 Mechanical Properties
Cold-Finished-
Annealed
Forging
and Hot-
Quality
Finished-
(All Sizes)
Annealed
(All Sizes)
N08367 N08367
A
Tensile strength, min, 95 (655)
ksi (MPa)
A
Yield strength, 0.2 % 45 (310)
offset, min, ksi (MPa)
A
Elongation in 2 in. or 50 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
A,B,C
Diameter tolerance, in. (mm)
SpecifiedSpecified 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
The maximum out-of-round tolerance for round wire is one-half of the total size
tolerance shown in the above table.
C
When it is necessary to heat treat or heat treat and pickle after cold finishing, size
tolerances are double those shown in the table for sizes 0.0240 in. (0.610 mm) and
over.
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.
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 in Table 8. For hot-finished flat bars and rods, the tolerances for width and thickness shall be as given in Table
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.
B691 − 18
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)
SpecifiedSpecified 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
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)
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:
7.6.1 Bars ordered to random or nominal lengths will be furnished with either cropped or saw-cut ends.
7.6.2 Bars ordered to cut lengths will be furnished with square saw-cut or machine cut ends.
B691 − 18
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)
SpecifiedSpecified Width, in. (mm)
0.035 (0.89) to
Under 0.029 0.029 (0.74) to
0.1875 (4.76), P
...
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 − 18
Standard Specification for
Iron-Nickel-Chromium-Molybdenum Alloy (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* E8/E8M Test Methods for Tension Testing of Metallic Ma-
terials
1.1 This specification covers iron-nickel-chromium-
2 E29 Practice for Using Significant Digits in Test Data to
molybdenum alloy (UNS N08367) in the form of hot-finished
Determine Conformance with Specifications
and cold-finished rounds, squares, hexagons, octagons, and
E1473 Test Methods for Chemical Analysis of Nickel, Co-
rectangles.
balt and High-Temperature Alloys
1.2 The values stated in inch-pound units are to be regarded
as standard. The values given in parentheses are mathematical
3. Terminology
conversions to SI units that are provided for information only
3.1 Definitions of Terms Specific to This Standard:
and are not considered standard.
3.1.1 The terms rod, bar, and wire, as used in this
1.3 The following safety hazards caveat pertains only to the
specification, are described as follows:
test methods portion, Section 12, of this specification: This
3.1.2 bar, n—hot-finished or cold-finished material of
standard does not purport to address all of the safety concerns,
round, square, hexagon, octagon, or rectangular solid section in
if any, associated with its use. It is the responsibility of the user
straight lengths.
of this standard to become familiar with all hazards including
3.1.3 rod, n—hot-finished material of round, square,
those identified in the appropriate Safety Data Sheet (SDS) for
hexagon, octagon, or rectangular solid section furnished in
this product/material as provided by the manufacturer, to
coils for subsequent cold drawing into finished products.
establish appropriate safety, health, and environmental
practices, and determine the applicability of regulatory limi-
3.1.4 wire, n—cold-finished material of round, square,
tations prior to use.
hexagon, octagon, or rectangle solid section furnished in coils.
1.4 This international standard was developed in accor-
dance with internationally recognized principles on standard-
4. Ordering Information
ization established in the Decision on Principles for the
4.1 It is the responsibility of the purchaser to specify all
Development of International Standards, Guides and Recom-
requirements that are necessary for material ordered to this
mendations issued by the World Trade Organization Technical
specification. Examples of such requirements include, but are
Barriers to Trade (TBT) Committee.
not limited to, the following:
2. Referenced Documents 4.1.1 Quantity (feet, meters, or number of pieces),
3 4.1.2 Form (rod, bar, wire),
2.1 ASTM Standards:
4.1.3 Name of material or UNS number,
B880 Specification for General Requirements for Chemical
4.1.4 Finish (see 8.2),
Check Analysis Limits for Nickel, Nickel Alloys and
4.1.5 Dimensions, including length,
Cobalt Alloys
4.1.6 Purchaser’s inspection, if required (Section 13),
4.1.7 ASTM designation and year of issue, and
This specification is under the jurisdiction of ASTM Committee B02 on
4.1.8 Samples for product analysis, if required.
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
B02.07 on Refined Nickel and Cobalt and Their Alloys.
Current edition approved Nov. 1, 2018. Published January 2019. Originally
5. Chemical Composition
approved in 1981. Last previous edition approved in 2013 as B691 – 02 (2013).
DOI: 10.1520/B0691-18.
5.1 The material shall conform to the composition limits
Designation established in accordance with ASTM E527 and SAE J1086,
specified in Table 1.
Practice for Numbering Metals and Alloys.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.2 If a product (check) analysis is made by the purchaser,
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
the material shall conform to the permissible variations for
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. product (check) analysis in Specification B880.
*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
B691 − 18
TABLE 1 Chemical Requirements TABLE 3 Permissible Variations in Diameter Cold-Finished
Round Bars and Wire
Composition Limits, %
Element
A,B,C
Diameter tolerance, in. (mm)
N08367
Specified Diameter, in. (mm)
Plus and Minus
Carbon 0.030 max
Manganese 2.00 max
0.0030 (0.076) to 0.0048 (0.122), excl 0.0001 (0.003)
Silicon 1.00 max 0.0048 (0.122) to 0.0080 (0.203), excl 0.0002 (0.005)
Phosphorus 0.040 max
0.0080 (0.203) to 0.0120 (0.305), excl 0.0003 (0.008)
Sulfur 0.030 max
0.0120 (0.305) to 0.0240 (0.610), excl 0.0004 (0.010)
Chromium 20.00 to 22.00
0.0240 (0.610) to 0.0330 (0.838), excl 0.0005 (0.013)
Nickel 23.50 to 25.50
0.0330 (0.838) to 0.0440 (1.118), excl 0.0008 (0.020)
Molybdenum 6.00 to 7.00
0.0440 (1.118) to 0.3125 (7.938), excl 0.001 (0.03)
Nitrogen 0.18 to 0.25
0.3125 (7.938) to 0.5000 (12.700), excl 0.0015 (0.038)
A
Iron remainder
0.5000 (12.700) to 1.000 (25.4), excl 0.002 (0.05)
Copper 0.75 max
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
Iron shall be determined arithmetically by difference.
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.
6. Mechanical Properties and Other Requirements
B
The maximum out-of-round tolerance for round wire is one-half of the total size
tolerance shown in the above table.
6.1 The material shall conform to the mechanical property
C
When it is necessary to heat treat or heat treat and pickle after cold finishing, size
requirements specified in Table 2.
tolerances are double those shown in the table for sizes 0.0240 in. (0.610 mm) and
over.
7. Dimensions and Permissible Variations
7.1 Size:
7.1.1 Rounds—The permissible variations in size of cold-
7.4 Machining Allowances—When the surfaces of hot-
finished round shall be as given in Table 3. For hot-finished
finished material are to be machined, the allowances given in
round bars and rod, they shall be as given in Table 4.
Table 10 are recommended for normal machining operations.
7.1.2 Squares—The permissible variations in size of cold-
finished square bars shall be as given in Table 5. For hot-
7.5 Length:
finished square bars and rods, they shall be as given in Table 4.
7.5.1 Unless multiple, nominal, or cut lengths are specified,
7.1.3 Hexagons and Octagons—The permissible variations
random mill lengths shall be furnished.
in size of cold-finished hexagons and octagons shall be as
7.5.2 When bars are ordered in multiple lengths, ⁄4 in. (6.4
given in Table 5. For hot-finished bar and rod hexagons and
mm) will be allowed for each multiple cut, unless otherwise
octagons they shall be as given in Table 6.
specified.
7.1.4 Flats (Rectangles) —The permissible variations in
7.5.3 The permissible variations in length of hot or cold-
width and thickness of cold-finished flats shall be as given in
finished bars shall be as specified in Table 11 or Table 12
Table 7 for bars and for wire in Table 8. For hot-finished flat
depending upon whether or not the material is specified to be
bars and rods, the tolerances for width and thickness shall be as
machine-cut after straightening.
given in Table 9.
7.6 Ends:
7.2 Out-of-Round—Hot-finished rounds and cold-finished
7.6.1 Bars ordered to random or nominal lengths will be
rounds (except forging quality), all sizes, in straight lengths,
furnished with either cropped or saw-cut ends.
shall not be out-of-round by more than shown in Table 4 and
7.6.2 Bars ordered to cut lengths will be furnished with
Table 3.
square saw-cut or machine cut ends.
7.3 Corners—Cold-finished squares, rectangles, hexagons
7.7 Straightness:
and octagons will have equal angles and sharp corners.
7.7.1 The permissible variations in straightness of cold-
finished bars shall be as specified in Table 13.
7.7.2 The permissible variations in straightness of hot-
finished bars shall be as specified in Table 13.
TABLE 2 Mechanical Properties
Cold-Finished-
8. Workmanship, Finish, and Appearance
Annealed and
Forging Quality
Hot-Finished-
(All Sizes)
8.1 The material shall be uniform in quality and condition,
Annealed
(All Sizes) smooth, commercially straight or flat, and free of injurious
N08367 N08367 imperfections.
A
Tensile strength, min, 95 (655)
8.2 Finishes available include hot-rolled, hot rolled-
ksi (MPa)
A
annealed-descaled, cold-drawn, ground, turned, and machined.
Yield strength, 0.2 % 45 (310)
offset, min, ksi (MPa)
A
Elongation in 2 in. or 50 30
9. Sampling
mm, or 4D, min, %
A 9.1 Lot Definition:
No tensile properties are required on forging quality.
9.1.1 A lot for chemical analysis shall consist of one heat.
B691 − 18
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
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)
9.1.2 Lots for mechanical testing shall consist of the mate- 9.2.2 Sampling for Mechanical Testing—Samples of the
rial from one heat, in the same condition (temper), and of the material to provide test specimens for mechanical testing shall
same specified size (excepting length) and cross-section. be taken from such locations in each lot (see 9.1.2) as to be
representative of that lot.
9.2 Test Material Selection:
9.2.1 Sampling for Chemical Analysis:
10. Number of Tests and Retests
9.2.1.1 An analysis of each lot shall be made by the
manufacturer from a representative sample obtained during the
10.1 Chemical Analysis—One test per lot.
pouring of the heat or subsequent processing.
10.2 Mechanical Tests and Tension Tests—One test per lot.
9.2.1.2 If samples for product (check) analysis are specified,
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
B691 − 18
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 Var
...
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