ASTM A479 - A 479M - 25 锅炉和其他压力容器用不锈钢棒材和型材标准规格

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Designation: A479/A479M −25 Used in USDOE-NE Standards
Standard Speciﬁcation for
Stainless Steel Bars and Shapes for Use in Boilers and
Other Pressure Vessels
1
This standard is issued under the ﬁxed designation A479/A479M; 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 hot- and cold-ﬁnished bars of
stainless steel, including rounds, squares, and hexagons, and
hot-rolled or extruded shapes such as angles, tees, and channels
for use in boiler and pressure vessel construction.
2
NOTE 1—There are standards covering high nickel, chromium, auste-
nitic corrosion, and heat-resisting alloy materials. These standards are
under the jurisdiction of ASTM Subcommittee B02.07 and may be found
in Annual Book of ASTM Standards, Vol 02.04.
1.2 The values stated in either SI units or inch-pound units
are to be regarded separately as standard. The values stated in
each system may not be exact equivalents; therefore, each
system shall be used independently of the other. Combining
values from the two systems may result in non-conformance
with the standard.
1.3 Unless the order speciﬁes the applicable “M” speciﬁca-
tion designation, the material shall be furnished to the inch-
pound units.
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:
3
A262 Practices for Detecting Susceptibility to Intergranular
Attack in Austenitic Stainless Steels
A370 Test Methods and Deﬁnitions for Mechanical Testing
of Steel Products
A484/A484M Speciﬁcation for General Requirements for
Stainless Steel Bars, Billets, Shapes, and Forgings
A751 Test Methods and Practices for Chemical Analysis of
Steel Products
E112 Test Methods for Determining Average Grain Size
E527 Practice for Numbering Metals and Alloys in the
Uniﬁed Numbering System (UNS)
2.2 SAE Document:
4
SAE J 1086 Recommended Practice for Numbering Metals
and Alloys
3. General Requirements
3.1 The following requirements for orders for material
furnished under this speciﬁcation shall conform to the appli-
cable requirements of the current edition of Speciﬁcation
A484/A484M.
3.1.1 Deﬁnitions,
3.1.2 General requirements for delivery,
3.1.3 Ordering information,
3.1.4 Process,
3.1.5 Special tests,
3.1.6 Heat treatment,
3.1.7 Dimensions and permissible variations,
3.1.8 Workmanship, ﬁnish, and appearance,
3.1.9 Number of tests/test methods,
3.1.10 Specimen preparation,
3.1.11 Retreatment,
3.1.12 Inspection,
3.1.13 Rejection and rehearing,
3.1.14 Material test report,
3.1.15 Certiﬁcation, and
3.1.16 Packaging, marking, and loading.
4. Other Requirements
4.1 In addition to the requirements of this speciﬁcation, all
requirements of the current editions of Speciﬁcation A484/
1
This speciﬁcation is under the jurisdiction of ASTM Committee A01 on Steel,
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
A01.17 on Flat-Rolled and Wrought Stainless Steel.
Current edition approved May 1, 2025. Published June 2025. Originally
approved in 1962. Last previous edition approved in 2024 as A479/A479M – 24.
DOI: 10.1520/A0479_A0479M-25.
2
For ASME Boiler and Pressure Vessel Code applications see related Speciﬁ-
cation SA-479/SA-479M in Section II of that Code.
3
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.
4
Available from Society of Automotive Engineers (SAE), 400 Commonwealth
Dr., Warrendale, PA 15096-0001, http://www.sae.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

A484M shall apply. Failure to comply with the general
requirements of Speciﬁcation A484/A484M constitutes non-
conformance with this speciﬁcation.
5. Chemical Composition
5.1 Chemical composition shall be reported to the
purchaser, or his representative, and shall conform to the
requirements speciﬁed in Table 1.
5.2 When a product analysis is performed or requested by
the purchaser, the tolerance limits as described in Speciﬁcation
A484/A484M apply unless Supplementary Requirement S3 is
invoked.
5.3 Methods and practices relating to chemical analysis
required by this speciﬁcation shall be in accordance with Test
Methods, Practices, and Terminology A751.
6. Grain Size for Austenitic Grades
6.1 All austenitic grades shall be tested for average grain
size by Test Methods E112.
6.2 The H grades shall conform to an average grain size as
follows:
6.2.1 ASTM No. 6 or coarser for Types 304H, 309H, 310H,
and 316H, and
6.2.2 ASTM No. 7 or coarser for Types 321H, 347H, and
348H.
6.3 For S32615, the grain size as determined in accordance
with Test Methods E112, comparison method, Plate 11, shall be
No. 3 or ﬁner.
6.4 For N08810 and N08811, the average grain size as
determined in accordance with Test Methods E112 shall be
No. 5 or coarser.
6.5 Supplementary Requirement S1 shall be invoked when
non-H grade austenitic stainless steels are ordered for ASME
Code applications for service above 1000 °F [540 °C].
6.6 Annealed alloy UNS N08332 shall conform to an
average grain size of ASTM No. 5 or coarser, as measured by
Test Methods E112.
7. Mechanical Properties Requirements
7.1 The material shall conform to the mechanical property
requirements speciﬁed in Table 2 for the grade ordered. At least
one room-temperature test shall be performed by the manufac-
turer on a sample from at least one bar or shape from each lot
of material.
7.2 The yield strength shall be determined by the offset
(0.2 %) method as prescribed in Test Methods and Deﬁnitions
A370.
7.3 Martensitic material supplied in the annealed condition
shall be capable of meeting the hardened and tempered
mechanical properties when heat treated.
7.4 Hardness measurements, when required, shall be made
at a location midway between the surface and the center of the
cross section.
7.5 Martensitic grades shall be capable of meeting the
hardness requirements after heat treating as speciﬁed in Table
3.
8. Testing for Intermetallic Compounds
8.1 When speciﬁed by the purchaser in the purchase order,
the manufacturer shall test the austenitic or austenitic-ferritic
(duplex) stainless steel material in its ﬁnal condition in
accordance with supplementary test requirements S6.
NOTE 2—Many, if not all, duplex stainless steels and some austenitic
stainless steels will form intermetallic phases or compounds such as
sigma, chi, and laves phases when exposed to temperatures below the
speciﬁed annealing temperature or cooled slowly from a higher tempera-
ture during casting, welding, or annealing. These phases can have a
negative effect on mechanical properties and corrosion resistance. These
phases can typically be removed by correct annealing and cooling
practices. The presence of these phases can be demonstrated by tests,
typically involving metallography, impact toughness, or corrosion
resistance, although the testing requirements may be different for different
alloy grades. Such testing may or may not be routinely performed by the
manufacturer.
9. Certiﬁcation
9.1 The material manufacturer’s certiﬁcate of compliance
certifying that the material was manufactured and tested in
accordance with this speciﬁcation, together with a report of the
results required by this speciﬁcation and the purchase order,
shall be furnished at the time of shipment. The certiﬁcation
shall be positively relatable to the lot of material represented.
10. Product Marking
10.1 In addition to the marking requirements of Speciﬁca-
tion A484/A484M, materials that have been heat treated or
have been strain hardened shall be identiﬁed by placement of
the following symbols after the grade designation:
10.1.1 Austenitic Grades:
10.1.1.1 All grades in the annealed condition—A,
10.1.1.2 Strain hardened Type 316, Level 1—S1,
10.1.1.3 Strain hardened Type 316, Level 2—S2,
10.1.1.4 Hot-rolled Type XM-19—H,
10.1.1.5 Strain hardened Type XM-19—S, and
10.1.1.6 Material meeting Supplementary Requirement
S1—ELT (unnecessary for H grades).
10.1.1.7 In addition to all other marking requirements of
this speciﬁcation, when S1 is invoked, all grades in the direct
quenched condition shall be marked “D.”
10.1.2 Austenitic-Ferritic Grades—All grades in the an-
nealed condition—A.
10.1.3 Ferritic Grades—All grades in the annealed
condition—A.
10.1.4 Martensitic Grades:
10.1.4.1 All grades in the annealed condition—A.
10.1.4.2 Types 403 and 410—COND 1, COND 2, or COND
3 as appropriate for the tempering temperature employed.
10.1.4.3 Type 414, S41500, and Type XM-30 tempered
materials—T.
A479/A479M − 25
2

TABLE 1 Chemical Requirements

UNS

Designa-

tion

Type

Composition, %

Carbon Man-

ganese

Phos-

phorus Sulfur Silicon Chromium Nickel Nitrogen Molyb-

denum Other Elements

C, D

Austenitic Grades

N08020 Alloy 20 0.07 2.00 0.045 0.035 1.00 19.0–21.0 32.0–38.0 . . . 2.00–3.00 Cu 3.0–4.0;

Cb 8xC–1.00

N08031 . . . 0.015 2.00 0.020 0.010 0.3 26.0–28.0 30.0–32.0 0.15–0.25 6.0–7.0 Cu 1.0–1.4

N08330 . . . 0.08 2.00 0.03 0.03 0.75–1.50 17.0–20.0 34.0–37.0 . . . . . . Cu 1.00

Pb 0.005

Sn 0.025

N08332 . . . 0.05–0.10 2.00 0.03 0.03 0.75–1.50 17.0–20.0 34.0–37.0 . . . . . . Cu 1.00

Pb 0.005

Sn 0.025

N08367 . . . 0.030 2.00 0.040 0.030 1.00 20.0–22.0 23.5–25.5 0.18–0.25 6.0–7.0 Cu 0.75

N08800 800 0.10 1.50 0.045 0.015 1.00 19.0–23.0 30.0–35.0 . . . . . . Fe

39.5 min.

Cu 0.75

Al 0.15–0.60

Ti 0.15–0.60

N08810 800H 0.05–0.10 1.50 0.045 0.015 1.00 19.0–23.0 30.0–35.0 . . . . . . Fe

39.5 min.

Cu 0.75

Al 0.15–0.60

Ti 0.15–0.60

N08811 . . . 0.06–0.10 1.50 0.045 0.015 1.00 19.0–23.0 30.0–35.0 . . . . . . Fe

39.5 min.

Cu 0.75

0.25–0.60

N08700 . . . 0.040 2.00 0.040 0.030 1.00 19.0–23.0 24.0–26.0 . . . 4.3–5.0 Cu 0.50;

Cb 8xC–0.40

N08904 904L 0.020 2.00 0.045 0.035 1.00 19.0–23.0 23.0–28.0 0.10 4.0–5.0 Cu 1.0–2.0

N08925 . . . 0.020 1.00 0.045 0.030 0.50 19.0–21.0 24.0–26.0 0.10–0.20 6.0–7.0 Cu 0.80–1.50

N08926 . . . 0.020 2.00 0.030 0.010 0.50 19.0–21.0 24.0–26.0 0.15–0.25 6.0–7.0 Cu 0.50–1.50

S20161 . . . 0.15 4.0–6.0 0.045 0.030 3.0–4.0 15.0–18.0 4.0–6.0 0.08–0.20 . . . . . .

S20910 XM-19 0.06 4.0–6.0 0.045 0.030 1.00 20.5–23.5 11.5–13.5 0.20–0.40 1.50–3.00 Cb 0.10–0.30;

V 0.10–0.30

S21600 XM-17 0.08 7.5–9.0 0.045 0.030 1.00 17.5–20.5 5.0–7.0 0.25–0.50 2.00–3.00 . . .

S21603 XM-18 0.03 7.5–9.0 0.045 0.030 1.00 17.5–20.5 5.0–7.0 0.25–0.50 2.00–3.00 . . .

S21800

S21904

...

XM-11

0.10

0.04

7.0–9.0

8.0–10.0

0.060

0.045

0.030

3.5–4.5

1.00

16.0–18.0

19.0–21.5

8.0–9.0

5.5–7.5

0.08–0.18

0.15–0.40

... ...

S24000 XM-29 0.08 11.5–14.5 0.060 0.030 1.00 17.0–19.0 2.3–3.7 0.20–0.40 . . . . . .

S30200 302 0.15 2.00 0.045 0.030 1.00 17.0–19.0 8.0–10.0 0.10 . . . . . .

S30400 304 0.08

2.00 0.045 0.030 1.00 18.0–20.0 8.0–10.5 . . . . . . . . .

S30403 304L 0.030 2.00 0.045 0.030 1.00 18.0–20.0 8.0–12.0 . . . . . . . . .

S30409 304H 0.04–0.10 2.00 0.045 0.030 1.00 18.0–20.0 8.0–10.5 . . . . . . . . .

S30451 304N 0.08 2.00 0.045 0.030 1.00 18.0–20.0 8.0–12.0 0.10–0.16 . . . . . .

S30453 304LN 0.030 2.00 0.045 0.030 1.00 18.0–20.0 8.0–11.0 0.10–0.16 . . . . . .

S30600 . . . 0.018 2.00 0.020 0.020 3.7–4.3 17.0–18.5 14.0–15.5 . . . 0.20 Cu 0.50

S30815 . . . 0.05–0.10 0.80 0.040 0.030 1.40–2.00 20.0–22.0 10.0–12.0 0.14–0.20 . . . Ce 0.03–0.08

S30908 309S 0.08 2.00 0.045 0.030 1.00 22.0–24.0 12.0–15.0 . . . . . . . . .

S30909 309H 0.04–0.10 2.00 0.045 0.030 1.00 22.0–24.0 12.0–15.0 . . . . . . . . .

S30926 . . . 0.10 5.0–7.0 0.045 0.030 1.00 22.5–24.5 9.0–11.0 0.40–0.60 1.00–3.00 V 0.03–0.30;

B 0.010

S30940 309Cb 0.08 2.00 0.045 0.030 1.00 22.0–24.0 12.0–16.0 . . . . . . Cb 10×C- 1.10

S30880 ER308

0.08 1.00–2.50 0.030 0.030 0.25–0.60 19.5–22.0 9.0–11.0 . . . . . . . . .

S31008 310S 0.08 2.00 0.045 0.030 1.00 24.0–26.0 19.0–22.0 . . . . . . . . .

S31009 310H 0.04–0.10 2.00 0.045 0.030 1.00 24.0–26.0 19.0–22.0 . . . . . . . . .

S31010

. . . 0.030 5.50–6.50 0.030 0.0010 0.25–0.75 28.5–30.5 14.0–16.0 0.80–0.90 1.5–2.5 Al 0.05

B 0.005

S31040 310Cb 0.08 2.00 0.045 0.030 1.00 24.0–26.0 19.0–22.0 . . . . . . Cb 10×C-1.10

S31050 . . . 0.025 2.00 0.020 0.015 0.4 24.0–26.0 20.5–23.5 0.09–0.15 1.60–2.60 . . .

S31254 . . . 0.020 1.00 0.030 0.010 0.80 19.5–20.5 17.5–18.5 0.18–0.25 6.0–6.5 Cu 0.50–1.00

S31266 . . . 0.030 2.00–4.00 0.035 0.020 1.00 23.0–25.0 21.0–24.0 0.35–0.60 5.2–6.2 Cu 1.00–2.50

W 1.50–2.50

S31600 316 0.08

2.00 0.045 0.030 1.00 16.0–18.0 10.0–14.0 . . . 2.00–3.00 . . .

S31603 316L 0.030 2.00 0.045 0.030 1.00 16.0–18.0 10.0–14.0 . . . 2.00–3.00 . . .

S31609 316H 0.04–0.10 2.00 0.045 0.030 1.00 16.0–18.0 10.0–14.0 . . . 2.00–3.00 . . .

S31635 316Ti 0.08 2.00 0.045 0.030 1.00 16.0–18.0 10.0–14.0 0.10 2.00–3.00 Ti 5×(C+N)- 0.70

S31640 316Cb 0.08 2.00 0.045 0.030 1.00 16.0–18.0 10.0–14.0 0.10 2.00–3.00 Cb 10×C- 1.10

S31651 316N 0.08 2.00 0.045 0.030 1.00 16.0–18.0 10.0–14.0 0.10–0.16 2.00–3.00 . . .

S31653 316LN 0.030 2.00 0.045 0.030 1.00 16.0–18.0 10.0–14.0 0.10–0.16 2.00–3.00 . . .

S31700 317 0.08 2.00 0.045 0.030 1.00 18.0–20.0 11.0–15.0 . . . 3.0–4.0 . . .

S31725 . . . 0.030 2.00 0.045 0.030 1.00 18.0–20.0 13.5–17.5 0.20 4.0–5.0 . . .

S31726 . . . 0.030 2.00 0.045 0.030 1.00 17.0–20.0 14.5–17.5 0.10–0.20 4.0–5.0 . . .

S31727 . . . 0.030 1.00 0.030 0.030 1.00 17.5–19.0 14.5–16.5 0.15–0.21 3.8–4.5 Cu 2.8–4.0

S31740 . . . 0.005–0.020 2.00 0.045 0.030 1.00 17.0–19.0 11.0–15.0 0.06–0.15 3.0–4.5 Nb 0.20–0.50

(15xC min)

S32050 . . . 0.030 1.50 0.035 0.020 1.00 22.0–24.0 20.0–23.0 0.21–0.32 6.0–6.8 Cu 0.40

S32053 . . . 0.030 1.00 0.030 0.010 1.00 22.0–24.0 24.0–26.0 0.17–0.22 5.0–6.0 . . .

A479/A479M − 25

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摘要：

ASTM A479 - A 479M - 25 是锅炉和其他压力容器用不锈钢棒材与型材的标准化规格，最新版本为2025年发布。该标准覆盖了奥氏体、铁素体及马氏体不锈钢材料的化学成分、力学性能、热处理要求及尺寸公差，确保材料在高温高压环境下具备优异的耐腐蚀性和结构稳定性。适用于制造锅炉管板、法兰、紧固件及压力容器关键承压部件，广泛应用于电力、化工、石油及天然气行业。符合本标准的材料需经过严格拉伸测试、硬度测试及晶间腐蚀试验，以保障在极端工况下的安全性与耐久性。选择 ASTM A479 规范材料可帮

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ASTM A479 - A 479M - 25 锅炉和其他压力容器用不锈钢棒材和型材标准规格

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