ASTM A276 - A 276M - 25 不锈钢棒材和型材技术规范

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Designation: A276/A276M −25
Standard Speciﬁcation for
Stainless Steel Bars and Shapes
1
This standard is issued under the ﬁxed designation A276/A276M; 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 covers hot-ﬁnished or cold-ﬁnished
bars except bars for reforging (Note 1). It includes rounds,
squares, and hexagons, and hot-rolled or extruded shapes, such
as angles, tees, and channels in the more commonly used types
of stainless steels. The free-machining types (Note 2) for
general corrosion resistance and high-temperature service are
covered in a separate speciﬁcation.
NOTE 1—For bars for reforging, see Speciﬁcation A314.
NOTE 2—For free-machining stainless bars designed especially for
optimum machinability, see Speciﬁcation A582/A582M.
NOTE 3—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. Within the text, the
SI units are shown in brackets. 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. The inch-pound units shall apply unless the “M”
designation of this speciﬁcation is speciﬁed in the order.
1.3 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:
2
A314 Speciﬁcation for Stainless Steel Billets and Bars for
Forging
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
A582/A582M Speciﬁcation for Free-Machining Stainless
Steel Bars
A751 Test Methods and Practices for Chemical Analysis of
Steel Products
A1058 Test Methods for Mechanical Testing of Steel
Products—Metric
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:
3
SAE J 1086 Recommended Practice for Numbering Metals
and Alloys
3. Ordering Information
3.1 It is the responsibility of the purchaser to specify all
requirements that are necessary for material ordered under this
speciﬁcation. Such requirements may include but are not
limited to the following:
3.1.1 Quantity (weight or number of pieces),
3.1.2 Name of material: stainless steel,
3.1.3 Form (bars, angles, and so forth),
3.1.4 Condition (subsection 4.1),
3.1.5 Finish (Section 8 of Speciﬁcation A484/A484M),
3.1.6 Surface preparation of shapes (Section 8 of Speciﬁca-
tion A484/A484M),
3.1.7 Applicable dimensions including size, thickness,
width, and length, l,
3.1.8 Cross section (round, square, and so forth),
3.1.9 Type or UNS designation (Table 1),
3.1.10 ASTM designation and date of issue, and
3.1.11 Whether bars are to be rolled as bars or cut from strip
or plate.
3.1.12 Test for magnetic permeability when speciﬁed by
customer purchase order when ordering Types 201 and 205.
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 1944. Last previous edition approved in 2024 as A276/A276M – 24a.
DOI: 10.1520/A0276_A0276M-25.
2
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.
3
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

TABLE 1 Chemical Requirements

UNS

Designa-

tion

Type

Composition, %

Carbon Manganese Phos-

phorus

Sulfur Silicon Chromium Nickel Molyb-

denum

Nitrogen Other

Elements

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

Nb 8 × C

min.; 1.00

max

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

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

N08700 . . . 0.04 2.00 0.040 0.030 1.00 19.0–23.0 24.0–26.0 4.3–5.0 . . . Cu 0.50

Cb 8 × C

min

0.40 max

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

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

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

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

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

0.80–1.50

N08926 . . . 0.020 2.00 0.030 0.015 0.50 19.0–21.0 24.0–26.0 6.0–7.0 0.15–0.25 Cu

0.50–1.50

S20100 201 0.15 5.5–7.5 0.060 0.030 1.00 16.0–18.0 3.5–5.5 . . . 0.25 . . .

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 . . .

S20162 . . . 0.15 4.0–8.0 0.040 0.040 2.5–4.5 16.5–21.0 6.0–10.0 0.50–2.50 0.05–0.25 . . .

S20200 202 0.15 7.5–10.0 0.060 0.030 1.00 17.0–19.0 4.0–6.0 . . . 0.25 . . .

S20500 205 0.12–0.25 14.0–15.5 0.060 0.030 1.00 16.5–18.0 1.0–1.7 . . . 0.32–0.40 . . .

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

0.10–0.30,

0.10–0.30

S21800 . . . 0.10 7.0–9.0 0.060 0.030 3.5–4.5 16.0–18.0 8.0–9.0 . . . 0.08–0.18 . . .

S21900 XM-10 0.08 8.0–10.0 0.045 0.030 1.00 19.0–21.5 5.5–7.5 . . . 0.15–0.40 . . .

S21904 XM-11 0.04 8.0–10.0 0.045 0.030 1.00 19.0–21.5 5.5–7.5 . . . 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 . . .

S24100 XM-28 0.15 11.0–14.0 0.045 0.030 1.00 16.5–19.0 0.50–2.50 . . . 0.20–0.45 . . .

S28200 . . . 0.15 17.0–19.0 0.045 0.030 1.00 17.0–19.0 . . . 0.75–1.25 0.40–0.60 Cu

0.75–1.25

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

S30215 302B 0.15 2.00 0.045 0.030 2.00–3.00 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 8.0–11.0 . . . . . . . . .

S30403 304L

0.030 2.00 0.045 0.030 1.00 18.0–20.0 8.0–12.0 . . . . . . . . .

S30451 304N 0.08 2.00 0.045 0.030 1.00 18.0–20.0 8.0–11.0 . . . 0.10–0.16 . . .

S30452 XM-21 0.08 2.00 0.045 0.030 1.00 18.0–20.0 8.0–10.0 . . . 0.16–0.30 . . .

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

S30454 . . . 0.03 2.00 0.045 0.030 1.00 18.0–20.0 8.0–11.0 . . . 0.16–0.30 . . .

S30500 305 0.12 2.00 0.045 0.030 1.00 17.0–19.0 11.0–13.0 . . . . . . . . .

S30800 308 0.08 2.00 0.045 0.030 1.00 19.0–21.0 10.0–12.0 . . . . . . . . .

A276/A276M − 25

TABLE 1 Continued

UNS

Designa-

tion

Type

Composition, %

Carbon Manganese Phos-

phorus

Sulfur Silicon Chromium Nickel Molyb-

denum

Nitrogen Other

Elements

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

S30900 309 0.20 2.00 0.045 0.030 1.00 22.0–24.0 12.0–15.0 . . . . . . . . .

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

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

S31000 310 0.25 2.00 0.045 0.030 1.50 24.0–26.0 19.0–22.0 . . . . . . . . .

S31008 310S 0.08 2.00 0.045 0.030 1.50 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 1.5–2.5 0.80–0.90 Al 0.05

B 0.005

S31040 310Cb 0.08 2.00 0.045 0.030 1.50 24.0–26.0 19.0–22.0 . . . . . . Cb 10×C-

1.10

S31051 . . . 0.07 5.0–7.0 0.045 0.01 0.5 22.5–25.5 13.0–15.5 2.8–3.8 0.45–0.60 . . .

S31052

. . . 0.04 5.0–7.0 0.045 0.01 0.5 26.4–28.4 13.0–15.5 2.8–3.8 0.60–0.80 . . .

S31254 . . . 0.020 1.00 0.030 0.010 0.80 19.5–20.5 17.5–18.5 6.0–6.5 0.18–0.25 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 5.2–6.2 0.35–0.60 Cu

1.00–2.50

1.50–2.50

S31400 314 0.25 2.00 0.045 0.030 1.50–3.00 23.0–26.0 19.0–22.0 . . . . . . . . .

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 . . . . . .

S31635 316Ti 0.08 2.00 0.045 0.030 1.00 16.0–18.0 10.0–14.0 2.00–3.00 0.10 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 2.00–3.00 0.10 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 2.00–3.00 0.10–0.16 . . .

S31653

S31654

316LN

...

0.030

0.03

2.00

0.045

0.030

1.00

16.0–18.0

10.0–13.0

2.00–3.00

0.10–0.16

0.16–0.30

...

S31700 317 0.08 2.00 0.045 0.030 1.00 18.0–20.0 11.0–15.0 3.0–4.0 0.10 . . .

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

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

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

S31730 . . . 0.030 2.00 0.040 0.010 1.00 17.0–19.0 15.0–16.5 3.0–4.0 0.045 Cu 4.0-5.0

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

S32100 321 0.08 2.00 0.045 0.030 1.00 17.0–19.0 9.0–12.0 . . . . . . Ti

5×(C+N)-

0.70

S32654 . . . 0.020 2.0–4.0 0.030 0.005 0.50 24.0–25.0 21.0–23.0 7.0–8.0 0.45–0.55 Cu

0.30–0.60

S34565 . . . 0.030 5.0–7.0 0.030 0.010 1.00 23.0–25.0 16.0–18.0 4.0–5.0 0.40–0.60 Cb 0.10

S34700 347 0.08 2.00 0.045 0.030 1.00 17.0–19.0 9.0–12.0 . . . . . . Cb

10×C–1.10

S34800 348 0.08 2.00 0.045 0.030 1.00 17.0–19.0 9.0–12.0 . . . . . . Cb

10×C–1.10,

Ta 0.10

Co 0.20

S35130 . . . 0.04 1.5–3.5 0.045 0.01 0.5 26.5–28.0 29.5–31.3 3.0–4.0 0.25–0.35 . . .

Austenitic-Ferritic Grades

S31100 XM-26 0.06 1.00 0.045 0.030 1.00 25.0–27.0 6.0–7.0 . . . . . . Ti 0.25

S31803 . . . 0.030 2.00 0.030 0.020 1.00 21.0–23.0 4.5–6.5 2.5–3.5 0.08–0.20 . . .

S32101 . . . 0.040 4.0–6.0 0.040 0.030 1.00 21.0–22.0 1.35–1.70 0.10–0.80 0.20–0.25 Cu

0.10–0.80

S32202 . . . 0.030 2.00 0.040 0.010 1.00 21.5–24.0 1.00–2.80 0.45 0.18–0.26 . . .

S32205 . . . 0.030 2.00 0.030 0.020 1.00 22.0–23.0 4.5–6.5 3.0–3.5 0.14–0.20 . . .

S32304 . . . 0.030 2.50 0.040 0.030 1.00 21.5–24.5 3.0–5.5 0.05–0.60 0.05–0.20 Cu

0.05–0.60

S32506 . . . 0.030 1.00 0.040 0.015 0.90 24.0–26.0 5.5–7.2 3.0–3.5 0.08–0.20 W

0.05–0.30

S32550 . . . 0.04 1.50 0.040 0.030 1.0 24.0–27.0 4.5–6.5 2.9–3.9 0.10–0.25 Cu

1.50–2.50

S32750

. . . 0.030 1.20 0.035 0.020 0.80 24.0–26.0 6.0–8.0 3.0–5.0 0.24–0.32 Cu 0.50

A276/A276M − 25

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摘要：

ASTM A276 - A 276M - 25 是国际上广泛采用的不锈钢棒材和型材技术规范，适用于热加工或冷加工的不锈钢圆棒、方棒、六角棒及其他异形型材，涵盖奥氏体、铁素体、马氏体及沉淀硬化等常见不锈钢系列。该标准为工程设计、制造与采购提供了化学成分、机械性能、尺寸公差、表面质量及试验方法等统一技术指标，确保材料在高温、腐蚀或承压等极端工况下的可靠性与一致性。A276M 版本为公制单位等效替代，便于与国际市场接轨。无论是用于阀门、泵轴、紧固件还是结构件，遵循本规范可有效降低选材风险，提升供应链效

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