ASTM B709-98
(Specification)Standard Specification for Iron-Nickel-Chromium-Molybdenum Alloy (UNS N08028)* Plate, Sheet, and Strip
Standard Specification for Iron-Nickel-Chromium-Molybdenum Alloy (UNS N08028)* Plate, Sheet, and Strip
SCOPE
1.1 This specification covers iron-nickel-chromium-molybdenum alloy (UNS N08028)* plate, sheet, and strip in the solution-annealed condition.
1.2 The values stated in inch-pound units are to be regarded as the standard.
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Designation: B 709 – 98
Standard Specification for
Iron-Nickel-Chromium-Molybdenum Alloy (UNS N08028)*
Plate, Sheet, and Strip
This standard is issued under the fixed designation B 709; 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 3.2 The terms of plate, sheet, and strip as used in this
specification are described as follows:
1.1 This specification covers iron-nickel-chromium-
3.3 plate—material 0.187 in. (4.76 mm) and over in thick-
molybdenum alloy (UNS N08028)* plate, sheet, and strip in
ness and over 10 in. (254 mm) in width.
the solution-annealed condition.
3.4 sheet—material under 0.187 in. (4.75 mm) in thickness
1.2 The values stated in inch-pound units are to be regarded
and over 24 in. (610 mm) in width.
as the standard.
3.5 strip—material under 0.187 in. (4.75 mm) in thickness
2. Referenced Documents and under 24 in. (610 mm) in width.
2.1 ASTM Standards:
4. Ordering Information
B 880 Specification for General Requirements for Chemical
4.1 It is the responsibility of the purchaser to specify all
Check Analysis Limits for Nickel, Nickel Alloys and
requirements that are necessary for the safe and satisfactory
Cobalt Alloys
performance of material ordered under this specification.
E 8 Test Methods for Tension Testing of Metallic Materials
Examples of such requirements include, but are not limited to
E 10 Test Method for Brinell Hardness of Metallic Materi-
the following:
als
4.1.1 Quantity (weight or number of pieces),
E 18 Test Methods for Rockwell Hardness and Rockwell
4.1.2 Name of material or UNS N08028,
Superficial Hardness of Metallic Materials
4.1.3 Form (plate, sheet, or strip),
E 29 Practice for Using Significant Digits in Test Data to
4.1.4 Dimensions,
Determine Conformance with Specifications
4.1.5 Type of edge required (for strip only, see 8.4),
E 38 Methods for Chemical Analysis of Nickel-Chromium
4.1.6 Finish (Section 9)—For sheet ordered with No. 4
and Nickel-Chromium-Iron Alloys
finish, specify whether one or both sides are to be polished,
E 55 Practice for Sampling Wrought Nonferrous Metals and
4.1.7 ASTM designation and year of issue,
Alloys for Determination of Chemical Composition
3 4.1.8 Marking—State if metal die identification is required
E 140 Hardness Conversion Tables for Metals
on plate ⁄4 in. (6.35 mm) or thicker (Section 17),
E 1473 Test Methods for Chemical Analysis of Nickel,
7 4.1.9 Certification or Test Reports—State if certification or
Cobalt, and High-Temperature Alloys
test reports are required (Section 16), and
3. Terminology 4.1.10 Source Inspection—State if inspection is required
(Section 14).
3.1 Definitions of Terms Specific to This Standard:
5. Materials and Manufacture
5.1 Heat Treatment— The final heat treatment shall be a
This specification is under the jurisdiction of ASTM Committee B-2 on
solution-anneal. Minor cold working such as flattening or
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
temper rolling may be performed after the final solution
B02.07 on Refined Nickel and Cobalt and Their Alloys.
annealing treatment.
Current edition approved Oct. 10, 1998. Published November 1998. Originally
published as B 709 – 82. Last previous edition B 709 – 93.
NOTE 1—This recommended solution-anneal consists of heating to a
* New designation in accordance with ASTM E 527 and SAE J1086, Practice for
minimum temperature of 1975°F (1080°C) and cooling rapidly to room
Numbering Metals and Alloys (UNS).
Annual Book of ASTM Standards, Vol 02.04. temperature.
Annual Book of ASTM Standards, Vol 03.01.
Annual Book of ASTM Standards, Vol 14.02.
6. Chemical Composition
Discontinued—See 1989 Annual Book of ASTM Standards, Vol 03.05.
6.1 The material sampled in accordance with 11.2 shall
Annual Book of ASTM Standards, Vol 03.05.
Annual Book of ASTM Standards, Vol 03.06. conform to the composition limits prescribed in Table 1.
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B 709
6.2 If a product analysis is subsequently made, the material 9.1.3 Plate—The types of finish procurable on plates shall
shall conform to the composition limits with the product be as follows:
analysis variation prescribed B 880. 9.1.3.1 Hot- or Cold-Rolled, Annealed—Scale not removed.
9.1.3.2 Hot- or Cold-Rolled, Annealed, Descaled—Scale
7. Mechanical Properties removed by a blast cleaning or pickling operation.
9.2 Spot grinding to remove surface imperfections is per-
7.1 The material shall conform to the requirements as to the
mitted, provided such grinding does not reduce the thickness or
mechanical property prescribed in Table 2.
width at any point beyond the permissible variations in
dimensions.
8. Dimensions and Permissible Variations
8.1 Sheet—The material referred to as sheet shall conform
10. Sampling
to the variations in dimensions prescribed in Tables 3-8,
10.1 Lot for Chemical Analysis, Mechanical Testing, and
inclusive.
Corrosion Testing:
8.2 Cold-Rolled Strip—The material referred to as cold-
10.1.1 A lot for chemical analysis shall consist of one heat.
rolled strip shall conform to the permissible variations in
10.1.2 Plate—A lot of plate for testing and inspection
dimensions prescribed in Tables 9-12 inclusive.
purposes shall consist of the products resulting from the rolling
8.3 Plate—The material referred to as plate shall conform to
of one heat of material in the same condition and specified
the permissible variations in dimensions prescribed in Tables
thickness, solution annealed by the same practice, but in no
13-19, inclusive.
case more than 25 000 lb (11 340 kg).
8.4 Edges for Cold-Rolled Strip—The various types of
10.1.3 Sheet and Strip— A lot of sheet or strip for testing
edges procurable shall be as follows:
and inspection purposes shall consist of material from one heat
8.4.1 No. 1. Edge— Rolled edge, contour as specified.
in the same form (sheet or strip), condition, finish, and
8.4.2 No. 3 Edge—An edge produced by slitting.
specified thickness, solution-annealed by the same practice but
8.4.3 No. 5 Edge—Approximately square edge produced by
in no case more than 25 000 lb (11 340 kg).
rolling or filing, or both, after slitting.
10.2 Sampling of Chemical Analysis:
10.2.1 A representative sample shall be taken from each lot
9. Workmanship, Finish, and Appearance
during pouring or subsequent processing.
9.1 The material shall be free of injurious imperfections and
10.2.2 Product analysis, if performed, shall be wholly the
shall correspond to the designated finish as described as
responsibility of the purchaser.
follows:
10.3 Sampling for Mechanical Tests:
9.1.1 Sheet—The various types of finish procurable on sheet
10.3.1 A sample of the material to provide test specimens
products shall be as follows:
for mechanical tests shall be taken from such a location in each
9.1.1.1 No. 1 Finish— Hot-rolled, annealed, and descaled;
lot as to be representative of that lot.
produced by hot rolling to specified thicknesses followed by
10.3.2 When samples are to be taken after delivery, the
annealing and descaling (see 10.2).
purchaser of material ordered to cut lengths may request on the
9.1.1.2 No. 2D Finish— Dull, cold-rolled finish; produced
purchase order additional material of adequate size to provide
by cold rolling to the specified thickness, annealing and
sample coupons for inspection purposes.
descaling. The dull finish results from the descaling and
11. Number of Tests and Retests
pickling operations.
9.1.1.3 No. 2B Finish— Bright, cold-rolled finish; produced
11.1 In the case of sheet or strip supplied in coil form, two
by giving a final light cold-rolled pass with polished rolls, to a or more tension tests (one from each end of each coil), and one
sheet that has been annealed and descaled.
or more hardness tests shall be made on specimens taken from
9.1.1.4 No. 4 Finish— General-purpose polished finish. each end of the coil. When material is supplied in flatsheet, flat
Following initial grinding with coarser abrasives, sheets are
strip, or plate, one tension and one or more hardness tests shall
generally finished last with abrasives approximately 120 to 150
be made on each 100 or less sheets, strips, or plates of the same
mesh. Sheets can be produced with one or two sides polished.
lot. When specified, one corrosion test shall be conducted for
When polished on one side only, the other side may be rough
each lot.
ground in order to obtain the necessary flatness.
11.2 If any specimens selected to represent any lot fail to
9.1.1.5 Bright Annealed— Bright finish produced by cold
meet any of the test requirements, the material represented by
rolling to thickness, then annealing in a protective atmosphere.
such specimens may be retested. If there is valid reason to
9.1.2 Strip—The type of finish procurable on cold-rolled
believe the result is not representative, the material may be
strip shall be as follows: re-reannealed and retested.
9.1.2.1 No. 1 Finish— Cold-rolled to specified thickness
12. Specimen Preparation
annealed and pickled (see 10.2). Appearance of this finish is a
dull gray. 12.1 Tension test specimens from material under ⁄2 in. (12.7
9.1.2.2 No. 2 Finish— Same as No. 1 finish, followed by a mm) in thickness shall be of the full thickness of thematerial
final light cold-rolled pass, generally on highly polished rolls. and machined to the form and dimensions shown for the
9.1.2.3 Bright-Annealed— Bright finish produced by cold- sheet-type specimen in Test Methods E 8. Tension test speci-
rolling to thickness, then annealing in a protective atmosphere. mens from material ⁄2in. (12.7 mm) and over shall be of the
B 709
full thickness of the material, machined to the form and 14. Inspection
dimensions shown for the plate-type specimen in Test Methods
14.1 Inspection of the material by the purchaser shall be
E 8. Tension test specimens shall be taken from material after
made as agreed upon between the purchaser and the manufac-
final heat treatment and shall be selected in the transverse
turer as set forth in the purchase contract.
direction unless prohibited by width.
15. Rejection and Rehearing
13. Test Methods
13.1 Determine the chemical composition and properties of
15.1 Material that fails to conform to the requirements of
the material as enumerated in this specification, in case of
this specification may be rejected. Rejection should be reported
disagreement, in accordance with the following methods:
to the producer or supplier promptly and in writing. In case of
Test ASTM Designations
dissatisfaction with the results of the test, the producer or
A,B supplier may make claim for a rehearing.
Chemical analysis E 38, E 1473
Tension E 8
Brinell hardness E 10
16. Certification
Rockwell hardness E 18
Hardness conversion E 140
16.1 When specified in the purchase order or contract, a
Rounding procedure E 29
producer’s or supplier’s certification shall be furnished to the
Method of sampling for product E55
analysis
purchaser that the material was manufactured, sampled, tested,
and inspected in accordance with this specification and has
A
Iron shall be determined arithmetically by difference.
been found to meet the requirements. When specified in the
B
Methods E 38 are to be used only for elements not covered by Test Methods
purchase order or contract, a report of the test results shall be
E 1473.
furnished.
13.2 For purpose of determining compliance with the limits
in this specification, an observed value or a calculated value
17. Product Marking
shall be rounded as indicated in accordance with the rounding
method of Practice E 29.
17.1 Each piece (plate, sheet, strip, or coil) shall be marked
Requirements Rounded Unit for Observed
legibly with the specification number, UNS number, heat
or Calculated Value
number and the name of the manufacturer. When specified,
Chemical composition nearest unit in the last right- 1
marking shall be by die stamping on plates ⁄4 in. (6.35 mm) or
hardness and tolerance hand place of figures of
thicker.
(when expressed in deci- the specified limit
mals)
Tensile strength and yield nearest 1000 psi (7 MPa)
strength
Elongation nearest 1 %
TABLE 1 Chemical Requirements
Element Composition, %
Ni 29.5 to 32.5
A
Fe remainder
Cr 26.0 to 28.0
Mo 3.0 to 4.0
C, max 0.030
Si, max 1.00
Mn, max 2.50
P, max 0.030
S, max 0.030
Cu 0.6 to 1.4
A
Determined arithmetically by difference.
B 709
TABLE 2 Mechanical Property Requirements
Elonga-
Yield
Tensile tion in 2
Strength Rockwell
Strength, in. or 50
Form (0.2 % off- Hardness (or
min, ksi mm, or
A
set), min,
equivalent)
(MPa) 4D, min,
ksi (MPa)
%
Sheet 73 (500) 31 (214) 40 70–90 HRB
Strip 73 (500) 31 (214) 40 70–90 HRB
Plate 73 (500) 31 (214) 40 70–90 HRB
A
Hardness values are shown for information only and shall not constitute a basis for acceptance or rejection as long as the other mechanical properties are met.
TABLE 3 Thickness Tolerances for Hot-Rolled and
Cold-Rolled Sheets
Tolerance, over and
Specified Thickness, in. (mm)
under, in. (mm)
Over 0.145 to less than 0.187 (3.68 to less 0.014 (0.36)
than 4.76)
Over 0.130 to 0.145 (3.30 to 3.68), incl 0.012 (0.30)
Over 0.114 to 0.130 (2.90 to 3.30), incl 0.010 (0.25)
Over 0.098 to 0.114 (2.49 to 2.90), incl 0.009 (0.23)
Over 0.083 to 0.098 (2.11 to 2.49), incl 0.008 (0.20)
Over 0.072 to 0.083 (1.83 to 2.11), incl 0.007 (0.18)
Over 0.058 to 0.072 (1.47 to 1.83), incl 0.006 (0.15)
Over 0.040 to 0.058 (1.02 to 1.47), incl 0.005 (0.13)
Over 0.026 to 0.040 (0.66 to 1.02), incl 0.004 (0.10)
Over 0.016 to 0.026 (0.41 to 0.66), incl 0.003 (0.08)
Over 0.007 to 0.016 (0.18 to 0.41), incl 0.002 (0.05)
Over 0.005 to 0.007 (0.13 to 0.18), incl 0.0015 (0.04)
0.005 (0.13) 0.001 (0.03)
TABLE 4 Width and Length Tolerances for Hot-Rolled
and Cold-Rolled Resquared Sheets (Stretcher Leveled
Flatness)
Tolerance, in. (mm)
Specified Dimensions, in. (mm)
Over Under
For thicknesses under 0.031 (0.79):
Widths up to 48 (1219), excl ⁄16(1.6) 0
Widths 48 (1219) and over ⁄8(3.2) 0
Lengths up to 120 (3048), excl ⁄16 (1.6) 0
Lengths 120 (3048) and over ⁄8(3.2) 0
For thicknesses 0.031 (0.79) and over:
All widths and lengths ⁄4(6.4) 0
B 709
TABLE 5 Width, Length, and Camber Tolerances for
Hot-Rolled and Cold-Rolled Sheets Not Required
Width Tolerances
Tolerance for Specified Width,
Specified Thickness, in. in. (mm)
(mm) 24 to 48 (610 48 (1219)
to 1219), excl and ov
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