ASTM B688-96(2009)
(Specification)Standard Specification for Chromium-Nickel-Molybdenum-Iron (UNS N08366 and UNS N08367) Plate, Sheet, and Strip
Standard Specification for Chromium-Nickel-Molybdenum-Iron (UNS N08366 and UNS N08367) Plate, Sheet, and Strip
ABSTRACT
This specification covers UNS N08366 and N08367 chromium-nickel-molybdenum-iron alloy plates, sheets, and strips for use in corrosive service and heat-resisting applications. The material chemical composition and mechanical properties such as the yield strength, tensile strength, elongation, and hardness should conform to the specified requirements.
SCOPE
1.1 This specification covers chromium-nickel-molybdenum-iron UNS N08366 and UNS N08367* plate, sheet, and strip for use in corrosive service and heat-resisting applications.
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 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
Relations
Buy Standard
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:B688 −96(Reapproved 2009)
Standard Specification for
Chromium-Nickel-Molybdenum-Iron (UNS N08366 and UNS
N08367) Plate, Sheet, and Strip
This standard is issued under the fixed designation B688; 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 E140 Hardness Conversion Tables for Metals Relationship
Among Brinell Hardness, Vickers Hardness, Rockwell
1.1 This specification covers chromium-nickel-
Hardness, Superficial Hardness, Knoop Hardness, and
molybdenum-iron UNS N08366 and UNS N08367* plate,
Scleroscope Hardness
sheet, and strip for use in corrosive service and heat-resisting
E354 Test Methods for Chemical Analysis of High-
applications.
Temperature,Electrical,Magnetic,andOtherSimilarIron,
1.2 The values stated in inch-pound units are to be regarded
Nickel, and Cobalt Alloys
as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only
3. Terminology
and are not considered standard.
3.1 Definitions of Terms Specific to This Standard:
1.3 This standard does not purport to address all of the
3.1.1 sheet, n—material under ⁄16 in. (5 mm) in thickness
safety concerns, if any, associated with its use. It is the
and 24 in. (610 mm) and over in width.
responsibility of the user of this standard to become familiar
3.1.2 strip, n—material under ⁄16 in. (5 mm) in thickness
with all hazards including those identified in the appropriate
and under 24 in. (610 mm) in width.
Material Safety Data Sheet (MSDS) for this product/material
as provided by the manufacturer, to establish appropriate 3.1.3 plate, n—material ⁄16 in. (5 mm) and over in thickness
safety and health practices, and determine the applicability of
and over 10 in. (254 mm) in width.
regulatory limitations prior to use.
4. Ordering Information
2. Referenced Documents
4.1 Orders for material under this specification shall include
2.1 ASTM Standards:
the following information, as required:
E8/E8M Test Methods for Tension Testing of Metallic Ma-
4.1.1 Quantity (feet, metres, or number of pieces),
terials
4.1.2 Alloy name or UNS number,
E10 Test Method for Brinell Hardness of Metallic Materials
4.1.3 Finish (hot-rolled or cold-rolled),
E18 Test Methods for Rockwell Hardness of Metallic Ma-
4.1.4 Dimensions (thickness, width, and length if cut-
terials
length),
E29 Practice for Using Significant Digits in Test Data to
4.1.5 Certification, if required,
Determine Conformance with Specifications
4.1.6 Purchaser’s inspection, if required,
E38 Methods for Chemical Analysis of Nickel-Chromium
4.1.7 ASTM designation and year of issue, and
and Nickel-Chromium-Iron Alloys (Withdrawn 1989)
4.1.8 Samples for product analysis, if required.
This specification is under the jurisdiction of ASTM Committee B02 on 5. Chemical Composition
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
5.1 The material shall conform to the composition limits
B02.07 on Refined Nickel and Cobalt and Their Alloys.
Current edition approved April 15, 2009. Published April 2009. Originally
specified in Table 1.
approved in 1981. Last previous edition approved in 2004 as B688 – 96 (2004).
5.2 If a product (check) analysis is made by the purchaser,
DOI: 10.1520/B0688-96R09.
* New designation established in accordance withASTM E527 and SAE J1086,
the material shall conform to the permissible variations for
Practice for Numbering Metals and Alloys (UNS).
product (check) analysis in Table 1.
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 6. Mechanical Properties and Other Requirements
the ASTM website.
6.1 The material shall conform to the mechanical property
The last approved version of this historical standard is referenced on
www.astm.org. requirements specified in Table 2.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
B688−96 (2009)
TABLE 1 Chemical Requirements TABLE 4 Permissible Variations in Width and Length
for Hot-Rolled and Cold-Rolled Resquared Sheets
Product (Check)
(Stretcher Leveled Standard of Flatness)
Analysis Varia-
Composition Limits, %
tions, under min
Tolerances
Element or over max, of
Specified Dimensions, in. (mm) Plus
the Specified
Minus
N08366 N08367
Limit of Ele- in. mm
ment, %
For thickness under 0.131 (3.33):
Carbon 0.035 max 0.030 max 0.005 Widths up to 48 (1219) excl ⁄16 20
Manganese 2.00 max 2.00 max 0.04 Widths 48 (1219) and over ⁄8 30
Silicon 1.00 max 1.00 max 0.05 Lengths up to 120 (3048) excl ⁄16 20
Phosphorus 0.040 max 0.040 max 0.005 Lengths 120 (3048) and over ⁄8 30
Sulfur 0.030 max 0.030 max 0.005 For thicknesses 0.131 (3.33) and over:
Chromium 20.00 to 22.00 20.00 to 22.00 0.25 All widths and lengths ⁄4 60
Nickel 23.50 to 25.50 23.50 to 25.50 0.20
Molybdenum 6.00 to 7.00 6.00 to 7.00 0.15
Nitrogen . 0.18 to 0.25 0.01
A TABLE 5 Permissible Variations in Width for Hot-Rolled and
Iron remainder remainder .
Cold-Rolled Sheets not Resquared and Cold-Rolled Coils
Copper . 0.75 max 0.04
A
Tolerances for Specified
Iron shall be determined arithmetically by difference.
Specified Thickness, in. Width, in. (mm)
(mm) 24 (610) to 48 48 (1219) and
(1219), excl Over
3 1 1
TABLE 2 Mechanical Properties for Plate, Sheet, and Strip
Less than ⁄16 (4.76) ⁄16 (2) plus ⁄8 (3) plus
0 minus 0 minus
N08366 N08367
Yield strength, 0.2 % offset, min, ksi 35 (240) 45 (310)
(MPa)
Tensile strength, min, ksi (MPa) TABLE 6 Permissible Variations in Camber for Hot-Rolled
A
# ⁄16 in. (4.8 mm) thick 75 (515) 100 (690)
and Cold-Rolled Sheets Not Required and Cold-Rolled Coils
> ⁄16 75 (515) 95 (655)
Tolerance per
A A
Elongation in 2 in. or 50 mm or 4D, 30 30
Unit Length of
Specified Width, in. (mm)
min, %
Any 8 ft (2438 mm),
B
Hardness, max
in. (mm)
# ⁄16 in. (4.8 mm) thick 95 HRB 100 HRB
24 (610) to 36 (914), incl ⁄8 (3)
> ⁄16 212 HBN 240 HBN
Over 36 (914) ⁄16 (2)
A
Not applicable for thickness under 0.015 in. (0.40 mm).
A
Camber is the greatest deviation of a side edge from a straight line and
B
Hardness values (Brinell, Rockwell, or equivalent) are informative only and are
measurement is taken by placing an 8-ft (2438-mm) straightedge on the concave
not to be construed as the basis for acceptance or rejection.
side and measuring the greatest distance between the sheet edge and the
straightedge.
TABLE 3 Permissible Variations in Thickness for Hot-
Rolled Sheets in Cut Lengths, Cold-Rolled Sheets in Cut
TABLE 7 Permissible Variations in Length for Hot-
Lengths and Coils
Rolled and Cold-Rolled Sheets Not Resquared
Permissible
Length, ft (mm) Tolerances, in. (mm)
Variations, Plus
A Up to 10 (3048), incl ⁄4 (6) plus 0 minus
Specified Thickness, in. (mm)
and Minus
Over 10 (3048) to 20 (6096), incl ⁄2 (13) plus 0 minus
in. mm
Over 0.145 (3.68) to less than ⁄16 (4.76) 0.014 0.36
Over 0.130 (3.30) to 0.145 (3.68), incl 0.012 0.30
ordered to cut lengths in which case a variation of ⁄2 in. (13
Over 0.114 (2.90) to 0.130 (3.30), incl 0.010 0.25
mm)overthespecifiedlengthshallbepermitted.Thereshallbe
Over 0.098 (2.49) to 0.114 (2.90), incl 0.009 0.23
Over 0.083 (2.11) to 0.098 (2.49), incl 0.008 0.20
no flatness requirements for non-stretcher leveled strip.
Over 0.072 (1.83) to 0.083 (2.11), incl 0.007 0.18
Over 0.058 (1.47) to 0.072 (1.83), incl 0.006 0.15
7.3 Plate—Materialshallconformtothevariationsspecified
Over 0.040 (1.02) to 0.058 (1.47), incl 0.005 0.13
in Tables 14-20, inclusive. Specially flattened plate, when so
Over 0.026 (0.66) to 0.040 (1.02), incl 0.004 0.10
specified,shallhavepermissiblevariationsinflatnessasagreed
Over 0.016 (0.41) to 0.026 (0.66), incl 0.003 0.08
Over 0.007 (0.18) to 0.016 (0.41), incl 0.002 0.05 upon between the manufacturer and purchaser.
Over 0.005 (0.13) to 0.007 (0.18), incl 0.0015 0.04
0.005 (0.13) 0.001 0.03
8. Workmanship, Finish, and Appearance
A
Thicknessmeasurementsaretakenatleast ⁄8in.(9.52mm)fromtheedgeofthe
8.1 The material shall be uniform in quality and condition,
sheet.
smooth, commercially straight or flat, and free of injurious
imperfections.
7. Dimensions and Permissible Variations
9. Sampling
7.1 Sheet—Material shall conform to the variations speci-
9.1 Lot for Chemical Analysis and Mechanical Testing:
fied in Tables 3-9, inclusive. There will be no flatness require-
9.1.1 A lot for chemical analysis shall consist of one heat.
ments for non-stretcher leveled sheet.
9.1.2 Lots for mechanical testing shall consist of the mate-
7.2 Strip—Material shall conform to the variations specified rial from one heat, in the same condition, and of the same
in Tables 10-13, inclusive. Note that strip of all sizes may be nominal thickness.
B688−96 (2009)
TABLE 8 Permissible Variations in Flatness for Hot-Rolled and Cold-Rolled Sheets Specified to Stretcher-Leveled
Standard of Flatness
A
Specified Thickness, in. (mm) Width, in. (mm) Length, in. (mm) Flatness Tolerance, in. (mm)
3 1
Under ⁄16 (4.76) to 48 (1219), incl to 96 (2438), incl ⁄8 (3)
3 1
Under ⁄16 (4.76) to 48 (1219), incl over 96 (2438) ⁄4 (6)
3 1
Under ⁄16 (4.76) over 48 (1219) to 96 (2438), incl ⁄4 (6)
3 1
Under ⁄16 (4.76) over 48 (1219) over 96 (2438) ⁄4 (6)
TABLE 9 Permissible Variations in Diameter for Hot-Rolled and Cold-Rolled Sheets, Sheared Circles
Tolerance Over Specified Diameter (No Tolerance Under), in.
(mm)
Specified Thickness, in. (mm)
Diameters Under 30 Diameters 30 (762) Diameters Over 48
in. (762) to 48 in. (1219) in. (1219)
1 3 1
0.0972 (2.46) and thicker ⁄8 (3) ⁄16 (5) ⁄4 (6)
3 5 7
0.0971 (2.46) to 0.0568 (1.45), incl ⁄32 (2) ⁄32 (4) ⁄32 (6)
1 1 3
0.0567 (1.45) and thinner ⁄16 (2) ⁄8 (3) ⁄16 (5)
TABLE 10 Permissible Variations in Thickness for Cold-Rolled Strip in Coils and Cut Lengths
NOTE 1—Thickness measurements are taken at least ⁄8 in. (9.52 mm) in from the edge of the strip, except that on widths less than 1 in. (25.4 mm),
the tolerances are applicable for measurements at all locations. The tolerances in this table include crown tolerances.
Thickness Tolerances, for the Thickness and Widths Given, Plus and Minus, in. (mm)
Width, in. (mm)
Specified Thickness, in. (mm) 3
⁄16 (4.76) to 6 (152), Over 6 (152) to 12 Over 12 (305) to 24
incl (305), incl (610), excl
A
Thickness Tolerances
0.005 (0.13) to 0.010 (0.25), incl 10 % 10 % 10 %
Over 0.010 (0.25) to 0.011 (0.28), incl 0.0015 (0.04) 0.0015 (0.04) 0.0015 (0.04)
Over 0.011 (0.28) to 0.013 (0.33), incl 0.0015 (0.04) 0.0015 (0.04) 0.002 (0.05)
Over 0.013 (0.33) to 0.017 (0.43), incl 0.0015 (0.04) 0.002 (0.05) 0.002 (0.05)
Over 0.017 (0.43) to 0.020 (0.51), incl 0.0015 (0.04) 0.002 (0.05) 0.0025 (0.06)
Over 0.020 (0.51) to 0.029 (0.74), incl 0.002 (0.05) 0.0025 (0.06) 0.0025 (0.06)
Over 0.029 (0.74) to 0.035 (0.89), incl 0.002 (0.05) 0.003 (0.08) 0.003 (0.08)
Over 0.035 (0.89) to 0.050 (1.27), incl 0.0025 (0.06) 0.0035 (0.09) 0.0035 (0.09)
Over 0.050 (1.27) to 0.069 (1.75), incl 0.003 (0.08) 0.0035 (0.09) 0.0035 (0.09)
Over 0.069 (1.75) to 0.100 (2.54), incl 0.003 (0.08) 0.004 (0.10) 0.005 (0.13)
Over 0.100 (2.54) to 0.125 (2.98), incl 0.004 (0.10) 0.0045 (0.11) 0.005 (0.13)
Over 0.125 (2.98) to 0.161 (4.09), incl 0.0045 (0.11) 0.0045 (0.11) 0.005 (0.13)
Over 0.161 (4.09) to under ⁄16 (4.76) 0.005 (0.13) 0.005 (0.13) 0.006 (0.15)
A
Thickness tolerances given in in. (mm) unless otherwise indicated.
TABLE 11 Permissible Variations in Width for Cold-Rolled Strip in Coils and Cut Lengths for Edge Nos. 1 and 5
Width Tolerance for Thickness
Specified Edge
and Width Given, in. (mm)
Width, in. (mm) Thickness, in. (mm)
No.
Plus Minus
3 1
1 and 5 ⁄32 (7.14) and under ⁄16 (1.59) and under 0.005 (0.13) 0.005 (0.13)
3 3 3
1 and 5 over ⁄32 (7.14) to ⁄4 (19.05), incl ⁄32 (2.38) and under 0.005 (0.13) 0.005 (0.13)
3 1
1 and 5 over ⁄4 (19.05) to 5 (127), incl ⁄8 (3.18) and under 0.005 (0.13) 0.005 (0.13)
5 over 5 (127.00) to 9 (228.60), incl ⁄8 (3.18) to 0.008 (0.20), incl 0.010 (0.25) 0.010 (0.25)
5 over 9 (228.60) to 20 (508.00), incl 0.105 (2.67) to 0.015 (0.38) 0.010 (0.25) 0.010 (0.25)
5 over 20 (508.00) 0.080 (2.03) to 0.023 (0.58) 0.015 (0.38) 0.015 (0.38)
9.2 Test Material Selection: be taken from such locations in each lot (see 9.1.2)astobe
9.2.1 Chemical Analysis: representative of that lot.
9.2.1.1 An analysis of each lot shall be made by the
manufacturer from a representative sample obtained during the 10. Number of Tests
pouring of the heat or subsequent processing.
10.1 Chemical Analysis—One test per lot.
9.2.1.2 If samples for product (check) analysis are specified,
10.2 Mechanical Tests—One test per lot.
a representative sample shall be taken from each lot (see 9.1.1)
of finished material. 10.3 Retests—If the specimen used in the mechanical test of
9.2.2 Sampling for Mechanical Properties—Samples of the any lot fails to meet the specified requirements, two additional
material to provide test specimens for mechanical testing shall specimens shall be taken from different sample pieces and
B688−96 (2009)
TABLE 12 Permissible Variations in Width for Cold-Rolled Strip in Coils and Cut Lengths for Edge No. 3
Width Tolerance, Plus and Minus for Thickness and Width Given, in. (mm)
Over 9 Over 12 Over 20
1 1
Under ⁄2 ⁄2 (12.70) Over 6
(228.60) to (304.80) to (508.00) to
Specified Thickness, in. (mm)
(12.70) to to 6 (152.40) to
12 20 24
⁄16 (4.76), (152.40), 9 (228.60),
(304.80), (508.00), (609.60),
incl incl incl
incl incl incl
Under ⁄16 (4.76) to 0.161 (4.09), incl . 0.016 0.020 0.020 0.031 0.031
(0.41) (0.51) (0.51) (0.79) (0.79)
0.160 (4.06) to 0.100 (2.54), incl 0.010 0.010 0.016 0.016 0.020 0.020
(0.25) (0.25) (0.41) (0.41) (0.51) (0.51)
0.099 (2.51) to 0.069 (1.75), incl 0.008 0.008 0.010 0.010 0.016 0.020
(0.20) (0.20) (0.25) (0.25) (0.41) (0.51)
0.068 (1.73) and under 0.005 0.005 0.005 0.010 0.016 0.020
(0.13) (0.13) (0.13) (0.25) (0.41) (0.51)
TABLE 13 Permissible Variations in Camber for Cold-
12.3 Hardness Test—TestMethodE10orTestMethodsE18,
A
Rolled Strip in Coils and Cut Lengths
as applicable.
Tolerance
12.4 Hardness Conversion—Hardness Conversion Tables
per Unit
Length of
E140.
Specified Width, in. (mm)
Any8ft
(2438 mm),
12.5 Determination of Significant Places—For purposes of
in. (mm)
determining compliance with the specified limits for the
1 1
To 1 ⁄2 (38.10), incl ⁄2 (13)
1 1 r
...
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:B688–96(Reapproved2004) Designation: B 688 – 96 (Reapproved 2009)
Standard Specification for
Chromium-Nickel-Molybdenum-Iron (UNS N08366 and UNS
N08367) Plate, Sheet, and Strip
This standard is issued under the fixed designation B 688; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This specification covers chromium-nickel-molybdenum-iron UNS N08366 and UNS N08367* plate, sheet, and strip for
use in corrosive service and heat-resisting applications.
1.2The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information
only.
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 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:
E8 8/E 8M Test Methods for Tension Testing of Metallic Materials
E10 Test Method for Brinell Hardness of Metallic Materials
E18 Test Methods for Rockwell Hardness and Rockwell Superficial Hardness of Metallic MaterialsTest Methods for Rockwell
Hardness of Metallic Materials
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E38 Methods for Chemical Analysis of Nickel-Chromium and Nickel-Chromium-Iron Alloys
E 140 Hardness Conversion Tables for Metals Hardness Conversion Tables for Metals RelationshipAmong Brinell Hardness,
Vickers Hardness, Rockwell Hardness, Superficial Hardness, Knoop Hardness, and Scleroscope Hardness
E 354 Test Methods for Chemical Analysis of High-Temperature, Electrical, Magnetic, and Other Similar Iron, Nickel, and
Cobalt Alloys
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 sheet, n—material under ⁄16 in. (5 mm) in thickness and 24 in. (610 mm) and over in width.
3.1.2 strip, n—material under ⁄16 in. (5 mm) in thickness and under 24 in. (610 mm) in width.
3.1.3 plate, n—material ⁄16 in. (5 mm) and over in thickness and over 10 in. (254 mm) in width.
4. Ordering Information
4.1 Orders for material under this specification shall include the following information, as required:
4.1.1 Quantity (feet, metres, or number of pieces),
4.1.2 Alloy name or UNS number,
4.1.3 Finish (hot-rolled or cold-rolled),
4.1.4 Dimensions (thickness, width, and length if cut-length),
ThisspecificationisunderthejurisdictionofASTMCommitteeB02onNonferrousMetalsandAlloysandisthedirectresponsibilityofSubcommitteeB02.07onRefined
Nickel and Cobalt and Their Alloys.
Current edition approved May 1, 2004. Published May 2004. Originally approved in 1981. Last previous edition approved in 1996 as B688–96.
Current edition approved April 15, 2009. Published April 2009. Originally approved in 1981. Last previous edition approved in 2004 as B 688 – 96 (2004).
* New designation established in accordance with ASTM E 527 and SAE J1086, Practice for Numbering Metals and Alloys (UNS).
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM 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.
Withdrawn.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
B 688 – 96 (2009)
4.1.5 Certification, if required,
4.1.6 Purchaser’s inspection, if required,
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 Table 1.
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 Sheet—Material shall conform to the variations specified inTables 3-9, inclusive.There will be no flatness requirements for
non-stretcher leveled sheet.
7.2 Strip—Material shall conform to the variations specified in Tables 10-13, inclusive. Note that strip of all sizes may be
ordered to cut lengths in which case a variation of ⁄2 in. (13 mm) over the specified length shall be permitted. There shall be no
flatness requirements for non-stretcher leveled strip.
7.3 Plate—Material shall conform to the variations specified in Tables 14-20, inclusive. Specially flattened plate, when so
specified, shall have permissible variations in flatness as agreed upon between the manufacturer and purchaser.
8. Workmanship, Finish,Finish and Appearance
8.1 The material shall be uniform in quality and condition, smooth, commercially straight or flat, and free of injurious
imperfections.
9. Sampling
9.1 Lot for Chemical Analysis and Mechanical Testing:
9.1.1 A lot for chemical analysis shall consist of one heat.
9.1.2 Lots for mechanical testing shall consist of the material from one heat, in the same condition, and of the same nominal
thickness.
9.2 Test Material Selection:
9.2.1 Chemical Analysis:
9.2.1.1 An analysis of each lot shall be made by the manufacturer from a representative sample obtained during the pouring of
the heat or subsequent processing.
9.2.1.2 If samples for product (check) analysis are specified, a representative sample shall be taken from each lot (see 9.1.1)
of finished material.
9.2.2 Sampling for Mechanical Properties —Samples of the material to provide test specimens for mechanical testing shall be
taken from such locations in each lot (see 9.1.2) as to be representative of that lot.
10. Number of Tests
10.1 Chemical Analysis—One test per lot.
TABLE 1 Chemical Requirements
Product (Check)
Analysis Varia-
Composition Limits, %
tions, under min
Element or over max, of
the Specified
N08366 N08367
Limit of Ele-
ment, %
Carbon 0.035 max 0.030 max 0.005
Manganese 2.00 max 2.00 max 0.04
Silicon 1.00 max 1.00 max 0.05
Phosphorus 0.040 max 0.040 max 0.005
Sulfur 0.030 max 0.030 max 0.005
Chromium 20.00 to 22.00 20.00 to 22.00 0.25
Nickel 23.50 to 25.50 23.50 to 25.50 0.20
Molybdenum 6.00 to 7.00 6.00 to 7.00 0.15
Nitrogen . 0.18 to 0.25 0.01
A
Iron remainder remainder .
Copper . 0.75 max 0.04
A
Iron shall be determined arithmetically by difference.
B 688 – 96 (2009)
TABLE 2 Mechanical Properties for Plate, Sheet, and Strip
N08366 N08367
Yield strength, 0.2 % offset, min, ksi 35 (240) 45 (310)
(MPa)
Tensile strength, min, ksi (MPa)
# ⁄16 in. (4.8 mm) thick 75 (515) 100 (690)
> ⁄16 75 (515) 95 (655)
A A
Elongation in 2 in. or 50 mm or 4D, 30 30
min, %
B
Hardness, max
# ⁄16 in. (4.8 mm) thick 95 HRB 100 HRB
> ⁄16 212 HBN 240 HBN
A
Not applicable for thickness under 0.015 in. (0.40 mm).
B
Hardnessvalues(Brinell,Rockwell,orequivalent)areinformativeonlyandare
not to be construed as the basis for acceptance or rejection.
TABLE 3 Permissible Variations in Thickness for Hot-
Rolled Sheets in Cut Lengths, Cold-Rolled Sheets in Cut
Lengths and Coils
Permissible
Variations, Plus
A
Specified Thickness, in. (mm)
and Minus
in. mm
Over 0.145 (3.68) to less than ⁄16 (4.76) 0.014 0.36
Over 0.130 (3.30) to 0.145 (3.68), incl 0.012 0.30
Over 0.114 (2.90) to 0.130 (3.30), incl 0.010 0.25
Over 0.098 (2.49) to 0.114 (2.90), incl 0.009 0.23
Over 0.083 (2.11) to 0.098 (2.49), incl 0.008 0.20
Over 0.072 (1.83) to 0.083 (2.11), incl 0.007 0.18
Over 0.058 (1.47) to 0.072 (1.83), incl 0.006 0.15
Over 0.040 (1.02) to 0.058 (1.47), incl 0.005 0.13
Over 0.026 (0.66) to 0.040 (1.02), incl 0.004 0.10
Over 0.016 (0.41) to 0.026 (0.66), incl 0.003 0.08
Over 0.007 (0.18) to 0.016 (0.41), incl 0.002 0.05
Over 0.005 (0.13) to 0.007 (0.18), incl 0.0015 0.04
0.005 (0.13) 0.001 0.03
A
Thicknessmeasurementsaretakenatleast ⁄8in.(9.52mm)fromtheedgeof
the sheet.
TABLE 4 Permissible Variations in Width and Length
for Hot-Rolled and Cold-Rolled Resquared Sheets
(Stretcher Leveled Standard of Flatness)
Tolerances
Specified Dimensions, in. (mm) Plus
Minus
in. mm
For thickness under 0.131 (3.33):
Widths up to 48 (1219) excl ⁄16 20
Widths 48 (1219) and over ⁄8 30
Lengths up to 120 (3048) excl ⁄16 20
Lengths 120 (3048) and over ⁄8 30
For thicknesses 0.131 (3.33) and over:
All widths and lengths ⁄4 60
TABLE 5 Permissible Variations in Width for Hot-Rolled and
Cold-Rolled Sheets not Resquared and Cold-Rolled Coils
Tolerances for Specified
Specified Thickness, in. Width, in. (mm)
(mm) 24 (610) to 48 48 (1219) and
(1219), excl Over
3 1 1
Less than ⁄16 (4.76) ⁄16 (2) plus ⁄8 (3) plus
0 minus 0 minus
10.2 Mechanical Tests— One test per lot.
10.3 Retests—If the specimen used in the mechanical test of any lot fails to meet the specified requirements, two additional
specimens shall be taken from different sample pieces and tested. The results of the tests on both of these specimens shall meet
the specified requirements.
B 688 – 96 (2009)
TABLE 6 Permissible Variations in Camber for Hot-Rolled
A
and Cold-Rolled Sheets Not Required and Cold-Rolled Coils
Tolerance per
Unit Length of
Specified Width, in. (mm)
Any 8 ft (2438 mm),
in. (mm)
24 (610) to 36 (914), incl ⁄8 (3)
Over 36 (914) ⁄16 (2)
A
Camber is the greatest deviation of a side edge from a straight line and
measurement is taken by placing an 8-ft (2438-mm) straightedge on the concave
side and measuring the greatest distance between the sheet edge and the
straightedge.
TABLE 7 Permissible Variations in Length for Hot-
Rolled and Cold-Rolled Sheets Not Resquared
Length, ft (mm) Tolerances, in. (mm)
Up to 10 (3048), incl ⁄4 (6) plus 0 minus
Over 10 (3048) to 20 (6096), incl ⁄2 (13) plus 0 minus
TABLE 8 Permissible Variations in Flatness for Hot-Rolled and Cold-Rolled Sheets Specified to Stretcher-Leveled
Standard of Flatness
A
Specified Thickness, in. (mm) Width, in. (mm) Length, in. (mm) Flatness Tolerance, in. (mm)
3 1
Under ⁄16 (4.76) to 48 (1219), incl to 96 (2438), incl ⁄8 (3)
3 1
Under ⁄16 (4.76) to 48 (1219), incl over 96 (2438) ⁄4 (6)
3 1
Under ⁄16 (4.76) over 48 (1219) to 96 (2438), incl ⁄4 (6)
3 1
Under ⁄16 (4.76) over 48 (1219) over 96 (2438) ⁄4 (6)
TABLE 9 Permissible Variations in Diameter for Hot-Rolled and Cold-Rolled Sheets, Sheared Circles
Tolerance Over Specified Diameter (No Tolerance Under), in.
(mm)
Specified Thickness, in. (mm)
Diameters Under 30 Diameters 30 (762) Diameters Over 48
in. (762) to 48 in. (1219) in. (1219)
1 3 1
0.0972 (2.46) and thicker ⁄8 (3) ⁄16 (5) ⁄4 (6)
3 5 7
0.0971 (2.46) to 0.0568 (1.45), incl ⁄32 (2) ⁄32 (4) ⁄32 (6)
1 1 3
0.0567 (1.45) and thinner ⁄16 (2) ⁄8 (3) ⁄16 (5)
11. Specimen Preparation
11.1 Tension test specimens shall be taken from material in the final condition and tested transverse to the direction of rolling
when width permits.
11.2 Tension test specimens shall be any of the standard or sub-size specimens shown in Test Methods E 8/E 8M. The largest
possible size specimen of Test Methods E 8/E 8M shall be used.
11.3 In the event of disagreement, referee specimens shall be as follows:
11.3.1 Full thickness of the material machined to the form and dimensions shown for the sheet-type specimen in Test Methods
E 8/E 8M for material under ⁄2 in. (13 mm) in thickness.
11.3.2 The largest possible round specimen shown inTest Methods E 8/E 8M for material ⁄2 in. (13 mm) and over in thickness.
12. Test Methods
12.1 Determine the chemical composition and mechanical properties of the material, as enumerated in this specification, in the
case of disagreement, in accordance with the following ASTM methods:
12.1.1 Chemical Analysis—Methods E 38 and Test Methods E 354.
12.1.1.1 Methods E 38 shall be used only for elements not covered by Test Methods E 354.
12.2 Tension Test— Test Methods E 8/E 8M.
12.3 Hardness Test— Test Method E 10 or Test Methods E 18, as applicable.
12.4 Hardness Conversion—Hardness Conversion Tables E140. —Hardness Conversion Tables E 140.
12.5 Determination of Significant Places—For purposes of determining compliance with the specified limits for the
requirements of the properties listed in the following table, round an observed or a calculated value as indicated, in accordance
with the rounding methods of Practice E 29.
B 688 – 96 (2009)
TABLE 10 Permissible Variations in Thickness for Cold-Rolled Strip in Coils and Cut Lengths
NOTE 1— Thickness measurements are taken at least ⁄8 in. (9.52 mm) in from the edge of the strip, except that on widths less than 1 in. (25.4 mm),
the tolerances are applicable for measurements at all locations. The tolerances in this table include crown tolerances.
Thickness Tolerances, for the Thickness and Widths Given, Plus and Minus, in. (mm)
Width, in. (mm)
Specified Thickness, in. (mm) 3
⁄16 (4.76) to 6 (152), Over 6 (152) to 12 Over 12 (305) to 24
incl (305), incl (610), excl
A
Thickness Tolerances
0.005 (0.13) to 0.010 (0.25), incl 10 % 10 % 10 %
Over 0.010 (0.25) to 0.011 (0.28), incl 0.0015 (0.04) 0.0015 (0.04) 0.0015 (0.04)
Over 0.011 (0.28) to 0.013 (0.33), incl 0.0015 (0.04) 0.0015 (0.04) 0.002 (0.05)
Over 0.013 (0.33) to 0.017 (0.43), incl 0.0015 (0.04) 0.002 (0.05) 0.002 (0.05)
Over 0.017 (0.43) to 0.020 (0.51), incl 0.0015 (0.04) 0.002 (0.05) 0.0025 (0.06)
Over 0.020 (0.51) to 0.029 (0.74), incl 0.002 (0.05) 0.0025 (0.06) 0.0025 (0.06)
Over 0.029 (0.74) to 0.035 (0.89), incl 0.002 (0.05) 0.003 (0.08) 0.003 (0.08)
Over 0.035 (0.89) to 0.050 (1.27), incl 0.0025 (0.06) 0.0035 (0.09) 0.0035 (0.09)
Over 0.050 (1.27) to 0.069 (1.75), incl 0.003 (0.08) 0.0035 (0.09) 0.0035 (0.09)
Over 0.069 (1.75) to 0.100 (2.54), incl 0.003 (0.08) 0.004 (0.10) 0.005 (0.1
...
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