ASTM B688-96(2004)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: B 688 – 96 (Reapproved 2004)
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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope Nickel, and Cobalt Alloys
1.1 This specification covers chromium-nickel-
3. Terminology
molybdenum-iron UNS N08366 and UNS N08367* plate,
3.1 Definitions of Terms Specific to This Standard:
sheet, and strip for use in corrosive service and heat-resisting
3.1.1 sheet, n—material under ⁄16 in. (5 mm) in thickness
applications.
and 24 in. (610 mm) and over in width.
1.2 The values stated in inch-pound units are to be regarded
3.1.2 strip, n—material under ⁄16 in. (5 mm) in thickness
as the standard. The values given in parentheses are for
and under 24 in. (610 mm) in width.
information only.
3.1.3 plate, n—material ⁄16in.(5mm)andoverinthickness
1.3 This standard does not purport to address all of the
and over 10 in. (254 mm) in width.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to become familiar
4. Ordering Information
with all hazards including those identified in the appropriate
4.1 Orders for material under this specification shall include
Material Safety Data Sheet for this product/material as pro-
the following information, as required:
vided by the manufacturer, to establish appropriate safety and
4.1.1 Quantity (feet, metres, or number of pieces),
health practices, and determine the applicability of regulatory
4.1.2 Alloy name or UNS number,
limitations prior to use.
4.1.3 Finish (hot-rolled or cold-rolled),
4.1.4 Dimensions (thickness, width, and length if cut-
2. Referenced Documents
length),
2.1 ASTM Standards:
4.1.5 Certification, if required,
E 8 Test Methods for Tension Testing of Metallic Materials
4.1.6 Purchaser’s inspection, if required,
E 10 Test Method for Brinell Hardness of Metallic Materi-
4.1.7 ASTM designation and year of issue, and
als
4.1.8 Samples for product analysis, if required.
E 18 Test Methods for Rockwell Hardness and Rockwell
Superficial Hardness of Metallic Materials
5. Chemical Composition
E 29 Practice for Using Significant Digits in Test Data to
5.1 The material shall conform to the composition limits
Determine Conformance with Specifications
specified in Table 1.
E 38 Methods for Chemical Analysis of Nickel-Chromium
5.2 If a product (check) analysis is made by the purchaser,
and Nickel-Chromium-Iron Alloys
the material shall conform to the permissible variations for
E 140 Hardness Conversion Tables for Metals
product (check) analysis in Table 1.
E 354 Test Methods for Chemical Analysis of High-
Temperature, Electrical, Magnetic, and Other Similar Iron,
6. Mechanical Properties and Other Requirements
6.1 The material shall conform to the mechanical property
This specification is under the jurisdiction of ASTM Committee B02 on
requirements specified in Table 2.
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
B02.07 on Refined Nickel and Cobalt and Their Alloys.
7. Dimensions and Permissible Variations
Current edition approved May 1, 2004. Published May 2004. Originally
7.1 Sheet—Material shall conform to the variations speci-
approved in 1981. Last previous edition approved in 1996 as B 688 – 96.
* New designation established in accordance withASTM E 527 and SAE J1086,
fied in Tables 3-9, inclusive. There will be no flatness require-
Practice for Numbering Metals and Alloys (UNS).
ments for non-stretcher leveled sheet.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
7.2 Strip—Materialshallconformtothevariationsspecified
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
in Tables 10-13, inclusive. Note that strip of all sizes may be
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
ordered to cut lengths in which case a variation of ⁄2 in. (13
Withdrawn.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
B 688 – 96 (2004)
TABLE 1 Chemical Requirements TABLE 4 Permissible Variations in Width and Length
for Hot-Rolled and Cold-Rolled Resquared Sheets
Composition Limits, % Product (Check)
(Stretcher Leveled Standard of Flatness)
Analysis Varia-
tions, under min
Tolerances
Element or over max, of
N08366 N08367 Specified Dimensions, in. (mm) Plus
the Specified
Minus
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 1
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
Iron remainder remainder . TABLE 5 Permissible Variations in Width for Hot-Rolled and
Copper . 0.75 max 0.04
Cold-Rolled Sheets not Resquared and Cold-Rolled Coils
A
Iron shall be determined arithmetically by difference.
Tolerances for Specified
Specified Thickness, in. Width, in. (mm)
(mm) 24 (610) to 48 48 (1219) and
TABLE 2 Mechanical Properties for Plate, Sheet, and Strip
(1219), excl Over
3 1 1
N08366 N08367 Less than ⁄16 (4.76) ⁄16 (2) plus ⁄8 (3) plus
0 minus 0 minus
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)
TABLE 6 Permissible Variations in Camber for Hot-Rolled
3 A
> ⁄16 75 (515) 95 (655)
and Cold-Rolled Sheets Not Required and Cold-Rolled Coils
A A
Elongation in 2 in. or 50 mm or 4D, 30 30
Tolerance per
min, %
B
Unit Length of
Hardness, max
Specified Width, in. (mm)
3 Any 8 ft (2438 mm),
# ⁄16 in. (4.8 mm) thick 95 HRB 100 HRB
3 in. (mm)
> ⁄16 212 HBN 240 HBN
24 (610) to 36 (914), incl ⁄8 (3)
A
Not applicable for thickness under 0.015 in. (0.40 mm). 1
Over 36 (914) ⁄16 (2)
B
Hardnessvalues(Brinell,Rockwell,orequivalent)areinformativeonlyandare
A
Camber is the greatest deviation of a side edge from a straight line and
not to be construed as the basis for acceptance or rejection.
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
TABLE 3 Permissible Variations in Thickness for Hot- straightedge.
Rolled Sheets in Cut Lengths, Cold-Rolled Sheets in Cut
Lengths and Coils
TABLE 7 Permissible Variations in Length for Hot-
Permissible
Rolled and Cold-Rolled Sheets Not Resquared
Variations, Plus
A
Length, ft (mm) Tolerances, in. (mm)
Specified Thickness, in. (mm)
and Minus
Up to 10 (3048), incl ⁄4 (6) plus 0 minus
in. mm
Over 10 (3048) to 20 (6096), incl ⁄2 (13) plus 0 minus
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
so specified, shall have permissible variations in flatness as
Over 0.098 (2.49) to 0.114 (2.90), incl 0.009 0.23
agreed upon between the manufacturer and purchaser.
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
8. Workmanship, Finish, and Appearance
Over 0.040 (1.02) to 0.058 (1.47), incl 0.005 0.13
8.1 The material shall be uniform in quality and condition,
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
smooth, commercially straight or flat, and free of injurious
Over 0.007 (0.18) to 0.016 (0.41), incl 0.002 0.05
imperfections.
Over 0.005 (0.13) to 0.007 (0.18), incl 0.0015 0.04
0.005 (0.13) 0.001 0.03
9. Sampling
A
Thickness measurements are taken at least ⁄8 in. (9.52 mm) from the edge of
the sheet. 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 mate-
mm)overthespecifiedlengthshallbepermitted.Thereshallbe rial from one heat, in the same condition, and of the same
no flatness requirements for non-stretcher leveled strip. nominal thickness.
7.3 Plate—Material shall conform to the variations speci- 9.2 Test Material Selection:
fied in Tables 14-20, inclusive. Specially flattened plate, when 9.2.1 Chemical Analysis:
B 688 – 96 (2004)
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)
9.2.1.1 An analysis of each lot shall be made by the be taken from such locations in each lot (see 9.1.2) as to be
manufacturer from a representative sample obtained during the representative of that lot.
pouring of the heat or subsequent processing.
10. Number of Tests
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) 10.1 Chemical Analysis—One test per lot.
of finished material. 10.2 Mechanical Tests—One test per lot.
9.2.2 Sampling for Mechanical Properties—Samples of the 10.3 Retests—If the specimen used in the mechanical test of
material to provide test specimens for mechanical testing shall any lot fails to meet the specified requirements, two additional
B 688 – 96 (2004)
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-
12.5 Determination of Significant Places—For purposes of
A
Rolled Strip in Coils and Cut Lengths
determining compliance with the specified limits for the
Tolerance
requirements of the properties listed in the following table,
per Unit
round an observed or a calculated value as indicated, in
Length of
Specified Width, in. (mm)
Any8ft accordance with the rounding methods of Practice E 29.
(2438 mm),
Requirements rounded unit for observed or
in. (mm)
calculated value
1 1
To 1 ⁄2 (38.10), incl ⁄2 (13)
Chemical composition nearest unit in the last right-
1 1
Over 1 ⁄2 (38.10) to 24 (609.60), excl ⁄4 (6)
hand place of figures of the
A
specified limit
Camber is the deviation of a side edge from a straight line and measurement
is taken by pla
...