ASTM B425-99(2009)
(Specification)Standard Specification for Ni-Fe-Cr-Mo-Cu Alloy (UNS N08825 and UNS N08221) Rod and Bar
Standard Specification for Ni-Fe-Cr-Mo-Cu Alloy (UNS N08825 and UNS N08221) Rod and Bar
ABSTRACT
This specification covers nickel-iron-chromiummolybdenum-copper alloy (UNS N08825 and UNS N08221) in the form of hot-finished and cold-drawn rounds, squares, hexagons, and rectangles. The material shall conform to the composition limits specified. The material shall conform to the mechanical properties specified. Chemical analysis, tension test, and rounding procedure shall be made in accordance to the specified requirements.
SCOPE
1.1 This specification covers nickel-iron-chromium-molybdenum-copper alloy (UNS N08825 and UNS N08221)* in the form of hot-finished and cold-drawn rounds, squares, hexagons, 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 precautionary caveat pertains only to the test methods portion, Section 12, of this specification: This standard does not purport to address all of the safety problems, 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.
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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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: B425 – 99 (Reapproved 2009)
Standard Specification for
Ni-Fe-Cr-Mo-Cu Alloy (UNS N08825 and UNS N08221) Rod
and Bar
This standard is issued under the fixed designation B425; 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 B880 Specification for General Requirements for Chemical
2 Check Analysis Limits for Nickel, Nickel Alloys and
1.1 This specification covers nickel-iron-chromium-
Cobalt Alloys
molybdenum-copper alloy (UNS N08825 and UNS N08221)*
E8 Test Methods for Tension Testing of Metallic Materials
in the form of hot-finished and cold-drawn rounds, squares,
E29 Practice for Using Significant Digits in Test Data to
hexagons, and rectangles.
Determine Conformance with Specifications
1.2 The values stated in inch-pound units are to be regarded
E1473 Test Methods for Chemical Analysis of Nickel,
as standard. The values given in parentheses are mathematical
Cobalt, and High-Temperature Alloys
conversions to SI units that are provided for information only
and are not considered standard.
3. Terminology
1.3 The following precautionary caveat pertains only to the
3.1 Definitions of Terms Specific to This Standard:
test methods portion, Section 12, of this specification: This
3.1.1 bar, n—material of rectangular (flats), hexagonal, or
standard does not purport to address all of the safety problems,
square solid section up to and including 10 in. (254 mm) in
if any, associated with its use. It is the responsibility of the user
width and ⁄8 in. (3.2 mm) and over in thickness in straight
of this standard to become familiar with all hazards including
lengths.
those identified in the appropriate Material Safety Data Sheet
3.1.1.1 Discussion—Hot-worked rectangular bar in widths
(MSDS) for this product/material as provided by the manufac-
10in.(254mm)andundermaybefurnishedashot-rolledplate
turer, to establish appropriate safety and health practices, and
with sheared or cut edges in accordance with Specification
determine the applicability of regulatory limitations prior to
B424, provided the mechanical property requirements of this
use.
specification are met.
2. Referenced Documents 3.1.2 rod, n—material of round solid section furnished in
3 straight lengths.
2.1 ASTM Standards:
B424 Specification for Ni-Fe-Cr-Mo-Cu Alloy (UNS
4. Ordering Information
N08825 and UNS N08221)* Plate, Sheet, and Strip
4.1 It is the responsibility of the purchaser to specify all
requirements that are necessary for the safe and satisfactory
This specification is under the jurisdiction of ASTM Committee B02 on
performance of material ordered under this specification.
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
Examples of such requirements include, but are not limited to,
B02.07 on Refined Nickel and Cobalt and Their Alloys.
the following:
Current edition approved Oct. 1, 2009. Published October 2009. Originally
approved in 1964. Last previous edition approved in 2005 as B425 – 99 (2005).
4.1.1 ASTM designation and date of issue,
DOI: 10.1520/B0425-99R09.
4.1.2 UNS number,
* New designation established in accordance with Practice E527 and SAE
4.1.3 Section—Rod (round) or bar (square, hexagonal, or
J 1086, Practice for Numbering Metals and Alloys (UNS).
rectangular),
For ASME Boiler and Pressure Vessel Code applications, see related Specifi-
cation SB-425 in Section II of that code.
4.1.4 Dimensions, including length,
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
4.1.5 Condition (see Appendix X1),
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
4.1.6 Finish (see Appendix X1),
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. 4.1.7 Quantity—Feet (or metres) or number of pieces,
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
B425 – 99 (2009)
4.1.8 Certification—State if certification is required (Sec- 7.5.1 Rods and bars ordered to random or nominal lengths
tion 15), will be furnished with either cropped or saw-cut ends; material
4.1.9 Samples for Product (Check) Analysis—State whether ordered to cut lengths will be furnished with square saw-cut or
samples for product (check) analysis should be furnished (see machined ends.
5.2), and 7.6 Straightness:
4.1.10 Purchaser Inspection—If purchaser wishes to wit- 7.6.1 The permissible variations in straightness of cold-
ness tests or inspection of material at place of manufacture, the worked rod and bar as determined by the departure from
purchase order must so state, indicating which test or inspec- straightness shall be as prescribed in Table 7.
tions are to be witnessed (Section 13). 7.6.2 The permissible variations in straightness of hot-
worked rod and bar as determined by the departure from
straightness shall be as specified in Table 8.
5. Chemical Composition
5.1 The material shall conform to the composition limits
8. Workmanship, Finish, and Appearance
specified in Table 1.
8.1 The material shall be uniform in quality and condition,
5.2 If a product (check) analysis is performed by the
smooth, commercially straight or flat, and free of injurious
purchaser, it shall be done in accordance with Specification
imperfections.
B880 and the material shall conform to the product (check)
analysis variations defined in Table 1 of Specification B880.
9. Sampling
6. Mechanical Properties and Other Requirements 9.1 Lot—Definition:
9.1.1 A lot for chemical analysis shall consist of one heat.
6.1 Mechanical Properties—The material shall conform to
9.1.2 Alot for mechanical properties testing shall consist of
the mechanical properties specified in Table 2.
all material from the same heat, nominal diameter or thickness,
and condition.
7. Dimensions and Permissible Variations
9.1.2.1 Where material cannot be identified by heat, a lot
7.1 Diameter, Thickness, or Width—The permissible varia-
shall consist of not more than 500 lb (227 kg) of material in the
tions from the specified dimensions as measured on the
same size and condition. A single piece weighing over 500 lb
diameter or between parallel surfaces of cold-worked rod and
shall be considered as one lot.
barshallbeasprescribedinTable3,andofhot-workedrodand
9.2 Test Material Selection:
bar as prescribed in Table 4.
9.2.1 Chemical Analysis—Representative samples from
7.2 Out-of-Round—Hot-worked rods and cold-worked rods
each lot shall be taken during pouring or subsequent process-
(except“forgingquality”)allsizes,instraightlengths,shallnot
ing.
be out-of-round by more than one half the total permissible
9.2.1.1 Product (check) analysis shall be wholly the respon-
variations in diameter shown inTable 3 andTable 4, except for
sibility of the purchaser.
hot-workedrods ⁄2in.(12.7mm)indiameterandunder,which
9.2.2 Mechanical Properties—Samples of the material to
may be out-of-round by the total permissible variations in
providetestspecimensformechanicalpropertiesshallbetaken
diameter shown in Table 4.
from such locations in each lot as to be representative of that
7.3 Corners—Cold-worked bars will have practically exact
lot.
angles and sharp corners.
7.4 Machining Allowances for Hot-Worked Materials—
10. Number of Tests
When the surfaces of hot-worked products are to be machined,
10.1 Chemical Analysis—One test per lot.
the allowances prescribed in Table 5 are recommended for
10.2 Tension—One test per lot.
normal machining operations.
7.5 Length—The permissible variations in length of cold-
11. Specimen Preparation
worked and hot-worked rod and bar shall be as prescribed in
11.1 Tension test specimens shall be taken from material in
Table 6.
the final condition and tested in the direction of fabrication.
11.1.1 All rod and bar shall be tested in full cross-section
size when possible. When a full cross-section size test cannot
TABLE 1 Chemical Requirements
be performed, the largest possible round specimen shown in
Element UNS N08825 UNS N08221
Test Methods E8 shall be used. Longitudinal strip specimens
Nickel 38.0–46.0 39.0–46.0
shall be prepared in accordance with Test Methods E8 for
Chromium 19.5–23.5 20.0–22.0
A
rectangularbarupto ⁄2in.(12.7mm),inclusive,inthicknesses
Iron 22.0 min balance
Manganese 1.0 max 1.0 max
which are too wide to be pulled full size.
Carbon 0.05 max 0.025 max
Copper 1.5–3.0 1.5–3.0
12. Test Methods
Silicon 0.5 max 0.5 max
Sulfur 0.03 max 0.03 max
12.1 The chemical composition and mechanical and other
Aluminum 0.2 max 0.2 max
properties of the material as enumerated in this specification
Titanium 0.6–1.2 0.6–1.0
Molybdenum 2.5–3.5 5.0–6.5
shall be determined, in case of disagreement, in accordance
A
Element shall be determined arithmetically by difference. with the following ASTM standards:
B425 – 99 (2009)
TABLE 2 Mechanical Properties (Rod and Bar)
Yield Strength Elongation in 2
Tensile Strength
Alloy Condition 0.2 % offset, min, in.or50mmor
min, ksi (MPa)
D
ksi (MPa) 4 , min,%
A
UNS N08825 Annealed: 85 (586) 35 (241) 30
Hot-finished, cold–drawn
BBB
Forging Quality:
UNS N08221 All sizes annealed 79 (544) 34 (235) 30
A
Not applicable to diameters or cross sections under ⁄32 in. (2.4 mm).
B
Forging quality is furnished to chemical requirements and surface inspection only. No tensile properties are required.
TABLE 3 Permissible Variations in Diameter or Distance
following table, an observed or calculated value shall be
Between Parallel Surfaces of Cold-Worked Rod and Bar
rounded as indicated below, in accordance with the rounding
Permissible Variations From
method of Practice E29:
Specified Dimension, in.
Specified Dimension, in. (mm)
A
(mm) Rounded unit for observed or
Test
Plus Minus
calculated value
Chemical composition nearest unit in the last righthand place of figures
Rounds:
and tolerances of the specified limit. If two choices are possible,
1 3
⁄16 (1.6) to ⁄16 (4.8), excl 0 0.002 (0.05)
(when expressed in as when the digits dropped are exactly a 5, or a
3 1
⁄16 (4.8) to ⁄2 (12.7), excl 0 0.003 (0.08)
decimals) 5 followed only by zeros, choose the one ending
1 15
⁄2 (12.7) to ⁄16 (23.8), incl 0.001 (0.03) 0.002 (0.05)
in an even digit
...
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