ASTM B166 - 25 镍铬铝合金、镍铬铁合金、镍铬钴钼合金、镍铁铬钨合金和镍铬钼铜合金棒、棒和线材的标准规范

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Designation: B166 −25
Standard Speciﬁcation for
Nickel-Chromium-Aluminum Alloy, Nickel-Chromium-Iron
Alloys, Nickel-Chromium-Cobalt-Molybdenum Alloy, Nickel-
Iron-Chromium-Tungsten Alloy, and Nickel-Chromium-
Molybdenum-Copper Alloy Rod, Bar, and Wire
1
This standard is issued under the ﬁxed designation B166; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope*
1.1 This speciﬁcation
2
covers nickel-chromium-aluminum
alloy, nickel-chromium-iron alloys,
3
nickel-chromium-cobalt-
molybdenum alloy, nickel-iron-chromium-tungsten alloy, and
nickel-chromim-molybdenum-copper alloy in the form of hot-
ﬁnished and cold-worked rounds, squares, hexagons,
rectangles, and cold-worked wire.
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 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 prac-
tices and determine the applicability of regulatory limitations
prior to use.
1.4 This international standard was developed in accor-
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
4
B168 Speciﬁcation for Nickel-Chromium-Aluminum Alloys
(UNS N06699), Nickel-Chromium-Iron Alloys (UNS
N06600, N06601, N06603, N06690, N06693, N06025,
N06045, and N06696), Nickel-Chromium-Cobalt-
Molybdenum Alloy (UNS N06617), Nickel-Iron-
Chromium-Tungsten Alloy (UNS N06674), and Nickel-
Chromium-Molybdenum-Copper Alloy (UNS N06235)
Plate, Sheet, and Strip
B880 Speciﬁcation for General Requirements for Chemical
Check Analysis Limits for Nickel, Nickel Alloys and
Cobalt Alloys
B899 Terminology Relating to Non-ferrous Metals and Al-
loys
E8/E8M Test Methods for Tension Testing of Metallic Ma-
terials
E18 Test Methods for Rockwell Hardness of Metallic Ma-
terials
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 (Withdrawn 1989)
5
E112 Test Methods for Determining Average Grain Size
E140 Hardness Conversion Tables for Metals Relationship
Among Brinell Hardness, Vickers Hardness, Rockwell
Hardness, Superﬁcial Hardness, Knoop Hardness, Sclero-
scope Hardness, and Leeb Hardness
E527 Practice for Numbering Metals and Alloys in the
Uniﬁed Numbering System (UNS)
E1473 Test Methods for Chemical Analysis of Nickel,
Cobalt, and High-Temperature Alloys
1
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 Nov. 1, 2025. Published November 2025. Originally
approved in 1941. Last previous edition approved in 2024 as B166 – 24. DOI:
10.1520/B0166-25.
2
For ASME Boiler and Pressure Vessel Code application see related Speciﬁca-
tion SB-166 in Section II of that Code.
3
Designation established in accordance with Practice E527 and SAE J1086,
Practice for Numbering Metals and Alloys (UNS).
4
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at www.astm.org/contact. For Annual Book of
ASTM Standards volume information, refer to the standard’s Document Summary
page on the ASTM website.
5
The last approved version of this historical standard is referenced on
www.astm.org.
*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
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.
1

2.2 Federal Standards:
6
Fed. Std. No. 102 Preservation, Packaging and Packing
Levels
Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
Fed. Std. No. 182 Continuous Identiﬁcation Marking of
Nickel and Nickel-Base Alloys
2.3 Military Standard:
6
MIL-STD-129 Marking for Shipment and Storage
3. Terminology
3.1 For deﬁnitions of terms used in this speciﬁcation, refer
to Terminology B899.
3.2 In case of conﬂict between the deﬁnitions of this
speciﬁcation and Terminology B899, this speciﬁcation shall
prevail.
3.3 Deﬁnitions of Terms Speciﬁc to This Standard:
3.3.1 bar, n—material of rectangular (ﬂats), hexagonal, or
square solid section up to and including 10 in. (254 mm) in
width and
1
⁄
8
in. (3.2 mm) and over in thickness in straight
lengths.
3.3.2 rod, n—material of round solid section furnished in
straight lengths.
3.3.2.1 Discussion—Hot-worked rectangular bar in widths
10 in. and under may be furnished as hot-rolled plate with
sheared or cut edges in accordance with Speciﬁcation B168,
provided the mechanical property requirements of this speci-
ﬁcation are met.
3.3.3 wire, n—a cold-worked solid product of uniform
round cross section along its whole length, supplied in coil
form.
4. Ordering Information
4.1 It is the responsibility of the purchaser to specify all
requirements that are necessary for the safe and satisfactory
performance of material ordered under this speciﬁcation.
Examples of such requirements include, but are not limited to,
the following:
4.1.1 Alloy Name or UNS Number—see Table 1,
4.1.2 ASTM Designation, including year of issue,
4.1.3 Section—Rod (round), bar (square, hexagonal, or
rectangular), or wire (round),
4.1.4 Condition (see Table 2 and Table 3),
4.1.5 Finish,
4.1.6 Dimensions, including length (see Tables 4-8),
4.1.7 Quantity—feet or number of pieces,
4.1.8 Samples for Product (Check) Analysis—State whether
samples for product (check) analysis shall be furnished, and
4.1.9 Purchaser Inspection—If purchaser wishes to witness
tests or inspection of material at place of manufacture, the
purchase order must so state indicating which test or inspec-
tions are to be witnessed.
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 performed by the
purchaser, the material shall conform to the product (check)
analysis variations in Speciﬁcation B880.
6. Mechanical Properties and Other Requirements
6.1 Mechanical Properties—The material shall conform to
the mechanical properties speciﬁed in Table 2 for rod and bar
and Table 3 (UNS N06600 and N06690 only) for wire.
6.2 Grain Size:
6.2.1 Grain size for N06674 shall be 7 or coarser as
determined in accordance with Test Methods E112.
7. Dimensions and Permissible Variations
7.1 Diameter, Thickness, or Width—The permissible varia-
tions from the speciﬁed dimensions as measured on the
diameter or between parallel surfaces of cold-worked rod and
bar shall be as prescribed in Table 4; of hot-worked rod and bar
as prescribed in Table 5; and of wire as prescribed in Table 6.
7.2 Out-of-Round—Hot-worked rods and cold-worked rods
(except “forging quality”) all sizes, in straight lengths, shall not
be out-of-round by more than one half the total permissible
variations in diameter shown in Table 4 and Table 5, except for
hot-worked rods
1
⁄
2
in. (12.7 mm) in diameter and under, which
may be out-of-round by the total permissible variations in
diameter shown in Table 5. Cold-worked wire shall not be
out-of-round by more than one-half the total permissible
variations in diameter shown in Table 6.
7.3 Corners—Cold-worked bars will have practically exact
angles and sharp corners.
7.4 Machining Allowances for Hot-Worked Materials—
When the surfaces of hot-worked products are to be machined,
the allowances prescribed in Table 7 are recommended for
normal machining operations.
7.5 Length—The permissible variations in length of cold-
worked and hot-worked rod and bar shall be as prescribed in
Table 8.
7.5.1 Rods and bars ordered to random or nominal lengths
will be furnished with either cropped or saw-cut ends; material
ordered to cut lengths will be furnished with square saw-cut or
machined ends.
7.6 Straightness—The permissible variations in straightness
of cold-worked rod and bar as determined by the departure
from straightness shall be as prescribed in Table 9.
7.6.1 The permissible variations in straightness of hot-
worked rod and bar as determined by the departure from
straightness shall be as speciﬁed in Table 10.
8. Workmanship, Finish, and Appearance
8.1 The material shall be uniform in quality and condition,
smooth, commercially straight or ﬂat, and free of injurious
imperfections.
6
Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://
www.dodssp.daps.mil.
B166 − 25
2

TABLE 1 Chemical Requirements

Element

Composition Limits, %

Alloy

N06600

Alloy

N06601

Alloy

N06617

Alloy

N06674

Alloy

N06690

Alloy

N06693

Alloy

N06025

Alloy

N06045

Alloy

N06603

Alloy

N06696

Alloy

N06699

Alloy

N06235

Nickel 72.0 min 58.0–63.0 44.5 min remainder

58.0 min remainder

remainder

45.0 min remainder

remainder

Chromium 14.0–17.0 21.0–25.0 20.0–24.0 21.5–24.5 27.0–31.0 27.0–31.0 24.0-26.0 26.0-29.0 24.0-26.0 28.0-32.0 26.0-30.0 30.0-32.5

Cobalt ... ... 10.0–15.0 ... ... ... ... ... ... ... 1.0

Molybdenum ... ... 8.0–10.0 ... ... ... ... ... ... 1.0-3.0 ... 5.0-6.2

Iron 6.0–10.0 remainder

3.0 20.0–27.0 7.0–11.0 2.5–6.0 8.0–11.0 21.0-25.0 8.0-11.0 2.0-6.0 2.5 1.5

Manganese 1.0 1.0 1.0 1.50 0.5 1.0 0.15 1.0 0.15 1.0 0.50 0.3-0.65

Aluminum ... 1.0–1.7 0.8–1.5 ... ... 2.5–4.0 1.8-2.4 ... 2.4-3.0 ... 1.9-3.0 0.2-0.4

Carbon 0.15 0.10 0.05–0.15 0.01 0.05 max 0.15 0.15-0.25 0.05-0.12 0.20-0.40 0.15 0.005-0.10 0.02-0.06

Copper 0.5 1.0 0.5 ... 0.5 max 0.5 0.1 0.3 0.50 1.5-3.0 0.50 3.5-4.0

Silicon 0.5 0.5 1.0 1.0 0.5 max 0.5 0.5 2.5-3.0 0.50 1.0-2.5 0.50 0.2-0.6

Sulfur 0.015 0.015 0.015 0.015 0.015 max 0.01 0.010 0.010 0.010 0.010 0.01 0.015

Titanium ... ... 0.6 0.05–0.20 ... 1.0 0.1-0.2 ... 0.01-0.25 1.0 0.60 0.5

Phosphorus ... ... ... 0.030 ... ... 0.020 0.020 0.20 ... 0.02 0.03

Zirconium ... ... ... ... ... ... 0.01-0.10 ... 0.01-0.10 ... 0.10 ...

Yttrium ... ... ... ... ... ... 0.05-0.12 ... 0.01-0.15 ... ... ...

Boron ... ... 0.006 0.0005–0.006 ... ... ... ... ... ... 0.008 ...

Nitrogen ... ... ... 0.02 ... ... ... ... ... ... 0.05 ...

Niobium ... ... ... 0.10–0.35 ... 0.5–2.5 ... ... ... ... 0.50 1.0

Cerium ... ... ... ... ... ... ... 0.03-0.09 ... ... ... ...

Tungsten ... ... ... 6.0–8.0 ... ... ... ... ... ... ... 0.60

All values are maximums unless a range is provided or is a minimum or a remainder.

Element shall be determined arithmetically by difference.

B166 − 25

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标签： #铝合金 #合金 #铁合金

摘要：

本规范涵盖镍铬铝合金、镍铬铁合金、镍铬钴钼合金、镍铁铬钨合金及镍铬钼铜合金的棒材、棒料和线材，适用于高温耐蚀及航空航天、化工、能源等工业领域。ASTM B166-25为最新版本，规定了材料的化学成分、力学性能、尺寸公差、表面质量及试验方法，确保产品在极端环境下具有优异的抗氧化性、耐腐蚀性和高温强度。该标准为采购、生产及质量检验提供统一技术依据，帮助制造商和终端用户准确选材，提升设备可靠性并延长服役寿命。符合ASTM B166-25的合金材料广泛应用于燃气轮机、热处理炉、核反应堆、石油化工装置及海

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