ASTM A269/A269M-24

Standard Specification for Seamless and Welded Austenitic Stainless Steel Tubing for General Service

ABSTRACT
This specification covers nominal-wall-thickness, seamless and welded austenitic steel tubing for general corrosion-resisting and low- or high-temperature service. All material shall be furnished in the heat-treated condition. The steel shall conform to the chemical composition requirements. Different mechanical test requirements that includes, flaring test, flange test, hardness test, and reverse flattening test are presented. Also, each tube shall be subjected to the non-destructive electric test or the hydrostatic test. Finally the hardness requirements for different grades of tubes are highlighted.
SCOPE
1.1 This specification covers grades of nominal-wall-thickness, stainless steel tubing for general corrosion-resisting and low- or high-temperature service, as designated in Table 1.    
Grade  
Composition, %  
TP
XM-29  
. . .  
. . .  
. . .  
. . .  
. . .  
. . .  
. . .  
. . .  
. . .  
. . .  
. . .  
. . .  
. . .  
. . .  
. . .  
UNS DesignationA  
S24000  
S31254  
S31266  
S31725  
S31726  
S31727  
S32053  
S30600A  
S32654  
S34565  
S35045  
S35030  
N08367  
N08925  
N08926  
N08904  
Carbon  
0.08  
0.020  
0.030
max  
0.035  
0.035  
0.030  
0.030  
0.018  
0.020  
0.030  
0.06–
0.10  
0.05–0.10  
0.030  
0.020  
0.020  
0.020  
Manganese  
11.5–
14.5  
1.00  
2.00–4.00  
2.00  
2.00  
1.00  
1.00  
2.0  
2.0–
4.0  
5.0–
7.0  
1.50  
1.50  
2.00  
1.00  
2.00  
2.00  
Phosphorus  
0.060  
0.030  
0.035  
0.045  
0.045  
0.030  
0.030  
0.020  
0.030  
0.030  
0.045  
0.030  
0.040  
0.045  
0.030  
0.040  
Sulfur.  
0.030  
0.015  
0.020  
0.030  
0.030  
0.030  
0.010  
0.020  
0.005  
0.010  
0.015  
0.015  
0.030  
0.030  
0.010  
0.030  
Silicon  
1.00  
0.80  
1.00  
1.00  
1.00  
1.00  
1.00  
3.7–4.3  
0.50  
1.00  
1.00  
0.50–2.0  
1.00  
0.50  
0.50  
1.00  
Nickel  
2.3–
3.7  
17.5–
18.5  
21.0–24.0  
13.5–
17.5  
14.5–
17.5  
14.5–
16.5  
24.0–
26.0  
14.0–
15.5  
21.0–
23.0  
16.0–
18.0  
32.0–
37.0  
22.5–
27.5  
23.5–
25.5  
24.0–26.0  
24.0–
26.0  
23.0–
28.0  
Chromium  
17.0–
19.0  
19.5–
20.5  
23.0–25.0  
18.0–
20.0  
17.0–
20.0  
17.5–
19.0  
22.0–
24.0  
17.0–
18.5  
24.0–
25.0  
23.0–
25.0  
25.0–
29.0  
18.5–22.5  
20.0–
22.0  
19.0–21.0  
19.0–
21.0  
19.0–
23.0  
Molybdenum  
...  
6.0–
6.5  
5.2–6.2  
4.0–
5.0  
4.0–
5.0  
3.8–
4.5  
5.0–
6.0  
0.20
max  
7.0–
8.0  
4.0–
5.0  
. . .  
6.0–
7.0  
6.0–7.0  
6.0–
7.0  
4.0–
5.0  
Titanium  
. . .  
. . .  
. . .  
. . .  
. . .  
. . .  
. . .  
. . .  
. . .  
. . .  
0.15–
0.60  
. . .  
. . .  
. . .  
. . .  
. . .  
Columbium  
. . .  
. . .  
. . .  
. . .  
. . .  
. . .  
. . .  
. . .  
. . .  
0.10
max  
. . .  
0.25–0.75  
. . .  
. . .  
. . .  
. . .  
Tantalum  
. . .  
. . .  
. . .  
. . .  
. . .  
. . .  
. . .  
. . .  
. . .  
. . .  
. . .  
. . .  
. . .  
. . .  
NitrogenF  
0.20–
0.40  
0.18–
0.25  
0.35–0.60  
0.20
max  
0.10–
0.20  
0.15–
0.21  
0.17–
0.22  
0.45–
0.55  
0.40–
0.60  
. . .  
0.05–0.15  
0.18–
0.25  
0.10–0.20  
0.15–
0.25  
0.10
max  
Vanadium  
. . .  
. . .  
. . .  
. . .  
. . .  
. . .  
. . .  
. . .  
. . .  
. . .  
. . .  
Copper  
. . .  
0.50–
1.00  
1.00–2.50  
. . .  
. . .  
2.8–
4.0  
. . .  
0.50
max  
0.30–
0.60  
. . .  
0.75  
2.5–3.5  
0.75
max  
0.80–1.50  
0.50–
1.50  
1.00–
2.00  
Others  
. . .  
. . .  
W 1.50–2.50  
. . .  
. . .  
. . .  
. . .  
. . .  
. . .  
. . .  
Al
0.15–
0.60  
. . .  
. . .  
. . .  
. . .  
. . .  
1.2 The tubing sizes and thic...

General Information

• Status: Published
• Publication Date: 29-Feb-2024
• ICS: 23.040.10 - Iron and steel pipes
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.10 - Stainless and Alloy Steel Tubular Products

Relations

• Replaces: ASTM A269/A269M-22 - Standard Specification for Seamless and Welded Austenitic Stainless Steel Tubing for General Service
• Effective Date: 01-Mar-2024
• Referred By: ASTM A1119/A1119M-23a - Standard Specification for Welded Partially Corrugated Stainless Steel Tube for Potable Water and General Service
• Effective Date: 01-Mar-2024
• Referred By: ASTM F2929-17(2021) - Standard Specification for Crosslinked Polyethylene (PEX) Tubing of 0.070 in. Wall and Fittings for Radiant Heating Systems up to 75 psig
• Effective Date: 01-Mar-2024
• Referred By: ASTM F2080-23 - Standard Specification for Cold-Expansion Fittings with Metal Compression-Sleeves for Crosslinked Polyethylene (PEX) Pipe and SDR9 Polyethylene of Raised Temperature (PE-RT) Pipe
• Effective Date: 01-Mar-2024
• Referred By: ASTM F1387-23 - Standard Specification for Performance of Piping and Tubing Mechanically Attached Fittings
• Effective Date: 01-Mar-2024
• Referred By: ASTM A1016/A1016M-23 - Standard Specification for General Requirements for Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless Steel Tubes
• Effective Date: 01-Mar-2024
• Referred By: ASTM E2181/E2181M-19 - Standard Specification for Compacted Mineral-Insulated, Metal-Sheathed, Noble Metal Thermocouples and Thermocouple Cable
• Effective Date: 01-Mar-2024
• Referred By: ASTM F3347-23 - Standard Specification for Metal Press Insert Fittings with Factory Assembled Stainless Steel Press Sleeve for SDR9 Cross-linked Polyethylene (PEX) Tubing and SDR9 Polyethylene of Raised Temperature (PE-RT) Tubing
• Effective Date: 01-Mar-2024
• Referred By: ASTM F1807-23 - Standard Specification for Metal Insert Fittings Utilizing a Copper Crimp Ring, or Alternate Stainless Steel Clamps, for SDR9 Cross-linked Polyethylene (PEX) Tubing and SDR9 Polyethylene of Raised Temperature (PE-RT) Tubing
• Effective Date: 01-Mar-2024
• Referred By: ASTM C852/C852M-17(2022) - Standard Guide for Design Criteria for Plutonium Gloveboxes
• Effective Date: 01-Mar-2024
• Referred By: ASTM F2854-21 - Standard Specification for Push-Fit Crosslinked Polyethylene (PEX) Mechanical Fittings for Crosslinked Polyethylene (PEX) Tubing
• Effective Date: 01-Mar-2024
• Referred By: ASTM E585/E585M-23 - Standard Specification for Compacted Mineral-Insulated, Metal-Sheathed, Base Metal Thermocouple Cable
• Effective Date: 01-Mar-2024
• Referred By: ASTM F3348-23a - Standard Specification for Plastic Press Insert Fittings with Factory Assembled Stainless Steel Press Sleeve for SDR9 Cross-linked Polyethylene (PEX) Tubing and SDR9 Polyethylene of Raised Temperature (PE-RT) Tubing
• Effective Date: 01-Mar-2024

Overview

ASTM A269/A269M-24 is the internationally recognized standard specification for seamless and welded austenitic stainless steel tubing designed for general service. Published by ASTM International, this specification details the requirements for nominal wall thickness stainless steel tubes intended for general corrosion-resisting applications and both low- and high-temperature service.

This standard applies to a broad range of austenitic stainless steel grades and outlines strict criteria for chemical composition, heat treatment, mechanical properties, dimensional tolerances, and testing protocols, ensuring that tubing consistently meets high-performance and safety requirements.

Key Topics

• Scope and Material Grades:
  The standard covers a variety of tubing sizes starting from 1/4 inch [6.4 mm] in inside diameter and 0.020 inch [0.51 mm] minimum wall thickness, made from multiple grades of austenitic stainless steel (e.g., TP304, TP316, TP321, as well as specialty grades).

• Manufacture and Heat Treatment:
  Tubes can be produced by seamless or welded methods, and all material must be furnished in a solution heat-treated condition to ensure optimal corrosion resistance and mechanical integrity.

• Chemical Composition:
  Stainless steel grades must conform to specified composition limits for elements such as carbon, manganese, phosphorus, sulfur, silicon, nickel, chromium, and, where required, molybdenum, titanium, nitrogen, and others as detailed in the standard.

• Mechanical and Hardness Testing:
  The standard prescribes essential tests, including:

  • Flaring and flange tests for ductility
  • Hardness testing for every lot, with maximum allowable hardness values by grade
  • Reverse flattening (for welded tubes)
  • Hydrostatic or non-destructive electric tests for each tube to verify structural integrity

• Dimensional and Surface Requirements:
  Permissible variations in outside diameter, wall thickness, and length are tightly controlled. Surface finish requirements mandate removal of scale (usually by pickling) unless bright annealing is performed.

• Marking and Documentation:
  Tubes must be marked to indicate manufacture process (seamless or welded), final heat-treatment temperature (when relevant), and testing status.

Applications

ASTM A269/A269M-24 tubing is critical in industries requiring reliable austenitic stainless steel tubes for corrosion resistance and high-temperature performance. Key application areas include:

• Chemical and Petrochemical Processing:
  Used in processing lines, instrumentation, and fluid transport due to excellent corrosion resistance.

• Food and Beverage Processing:
  Widely employed in hygienic piping and fluid systems, benefiting from the cleanability of austenitic stainless steels.

• Pharmaceutical Manufacturing:
  Utilized for high-purity fluid transfer and process systems requiring sanitary and inert flow paths.

• Energy and Power Generation:
  Deployed in heat exchangers, condensers, and boiler tubing where both temperature and corrosion resistance are critical.

• General Industrial Piping:
  Suitable for a wide range of low- and high-temperature piping systems.

Related Standards

Several other ASTM and international standards are often referenced alongside ASTM A269/A269M-24:

• ASTM A262: Practices for detecting susceptibility to intergranular corrosion in austenitic stainless steels.
• ASTM A632: Specification for seamless and welded austenitic stainless steel tubing (small-diameter).
• ASTM A1016/A1016M: General requirements for steel tubes.
• ASTM A480/A480M: General requirements for flat-rolled steel plate, sheet, and strip.
• ASME B31.3: Process Piping Code for safe design and operation.
• SAE J1086: Unified numbering system for metals and alloys.

Ensuring compliance with ASTM A269/A269M-24 helps manufacturers, engineers, and procurement specialists specify and source stainless steel tubes that meet stringent quality, safety, and durability expectations in demanding service environments.

Standards Content (Sample)

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.
Designation: A269/A269M − 24
Standard Specification for
Seamless and Welded Austenitic Stainless Steel Tubing for
General Service
This standard is issued under the fixed designation A269/A269M; 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* 2. Referenced Documents
1.1 This specification covers grades of nominal-wall- 2.1 ASTM Standards:
thickness, stainless steel tubing for general corrosion-resisting A262 Practices for Detecting Susceptibility to Intergranular
and low- or high-temperature service, as designated in Table 1. Attack in Austenitic Stainless Steels
A480/A480M Specification for General Requirements for
1.2 The tubing sizes and thicknesses usually furnished to
Flat-Rolled Stainless and Heat-Resisting Steel Plate,
this specification are ⁄4 in. [6.4 mm] in inside diameter and
Sheet, and Strip
larger and 0.020 in. [0.51 mm] in nominal wall-thickness and
A632 Specification for Seamless and Welded Austenitic
heavier.
Stainless Steel Tubing (Small-Diameter) for General Ser-
1.3 Mechanical property requirements do not apply to
vice
tubing smaller than ⁄8 in. [3.2 mm] in inside diameter or 0.015
A1016/A1016M Specification for General Requirements for
in. [0.38 mm] in thickness.
Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless
Steel Tubes
NOTE 1—Additional testing requirements may apply for use in ASME
B31.3 applications. E527 Practice for Numbering Metals and Alloys in the
Unified Numbering System (UNS)
1.4 Optional supplementary requirements are provided and,
2.2 ASME Piping Code:
when one or more of these are desired, each shall be so stated
ASME B31.3 Process Piping
in the order.
2.3 Other Standard:
1.5 The values stated in either SI units or inch-pound units
SAE J1086 Practice for Numbering Metals and Alloys
are to be regarded separately as standard. Within the text, SI
(UNS)
units are shown in brackets. The values stated in each system
may not be exact equivalents; therefore, each system shall be
3. Ordering Information
used independently of the other. Combining values from the
3.1 Orders for material under this specification should
two systems may result in non-conformance with the standard.
include the following, as required, to describe the desired
The inch-pound units shall apply unless the “M” designation of
material adequately:
this specification is specified in the order.
3.1.1 Quantity (feet, metres, or number of lengths),
1.6 This international standard was developed in accor-
3.1.2 Name of material (seamless or welded tubes),
dance with internationally recognized principles on standard-
3.1.3 Grade (Table 1),
ization established in the Decision on Principles for the
3.1.4 Size (outside diameter and nominal wall thickness),
Development of International Standards, Guides and Recom-
3.1.5 Length (specific or random),
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
This specification is under the jurisdiction of ASTM Committee A01 on Steel, the ASTM website.
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee Available from American Society of Mechanical Engineers (ASME), ASME
A01.10 on Stainless and Alloy Steel Tubular Products. International Headquarters, Two Park Ave., New York, NY 10016-5990, http://
Current edition approved March 1, 2024. Published March 2024. Originally www.asme.org.
approved in 1944. Last previous edition approved in 2022 as A269/A269M – 22. Available from Society of Automotive Engineers (SAE), 400 Commonwealth
DOI: 10.1520/A0269_A0269M-24. 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
A269/A269M − 24
C
TABLE 1 Chemical Requirements %
Composition, %
Grade TP TP TP TP TP TP TP TP TP TP TP TP TP TP TP TP TP
. . . . . .
201 201LN 304 304L 304LN 316 316L 316LN . . . 317 321 347 348 XM-10 XM-11 XM-15 XM-19
UNS
S20100 S20153 S30400 S30403 S30416 S30453 S31600 31603 S31653 S31655 S31700 S31730 S32100 S34700 S34800 S21900 S21904 S38100 S20910
A
Designation
B B B B
Carbon 0.15 0.03 0.08 0.035 0.030 0.035 0.08 0.035 0.035 0.030 0.08 0.030 0.08 0.08 0.08 0.08 0.04 0.08 0.06
Manganese 5.5– 6.4– 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 8.00– 8.00– 2.00 4.0–
7.5 7.5 10.00 10.00 6.0
Phosphorus 0.060 0.045 0.045 0.045 0.045 0.045 0.045 0.045 0.045 0.045 0.045 0.040 0.045 0.045 0.045 0.045 0.045 0.030 0.045
Sulfur 0.030 0.015 0.030 0.030 0.015 0.030 0.030 0.030 0.030 0.015 0.030 0.010 0.030 0.030 0.030 0.030 0.030 0.030 0.030
Silicon 1.00 0.75 1.00 1.00 0.80– 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.50– 1.00
2.00 2.50
Nickel 3.5– 4.0– 8.0– 8.0– 9.0– 8.0– 10.0– 10.0– 10.0– 8.0– 11.0– 15.0– 9.0– 9.0– 9.0– 5.5– 5.5– 17.5– 11.5–
5.5 5.0 11.0 12.0 11.0 11.0 14.0 15.0 13.0 9.5 15.0 16.5 12.0 12.0 12.0 7.5 7.5 18.5 13.5
Chromium 16.0– 16.0– 18.0– 18.0– 17.5– 18.0– 16.0– 16.0– 16.0– 19.5– 18.0– 17.0– 17.0– 17.0– 17.0– 19.0– 19.0– 17.0– 20.5–
18.0 17.5 20.0 20.0 19.5 20.0 18.0 18.0 18.0 21.5 20.0 19.0 19.0 19.0 19.0 21.5 21.5 19.0 23.5
Molybdenum . . . . . . . . . . . . 0.40– . . . 2.00– 2.00– 2.00– 0.5– 3.0– 3.0–4.0 . . . . . . . . . . . . . . . . . . 1.50–
0.80 3.00 3.00 3.00 1.5 4.0 3.00
D
Titanium . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
E
Columbium . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 × C . . . . . . . . . 0.10–
min 0.30
1.10
max
Tantalum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.10 . . . . . . . . . . . .
F
Nitrogen 0.25 0.10– . . . . . . 0.10 0.10– . . . . . . 0.10– 0.14– . . . 0.45 . . . . . . . . . 0.15– 0.15– . . . 0.20–
0.25 0.16 0.16 0.25 0.40 0.40 0.40
Vanadium . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.10–
0.30
Copper . . . 1.00 . . . . . . . . . . . . . . . . . . . . . 1.00 . . . 4.0–5.0 . . . . . . . . . . . . . . . . . . . . .
Others . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Co 0.20 . . . . . . . . . . . .
max
A269/A269M − 24
Composition, %
Grade TP
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
XM-29
UNS
A
S24000 S31254 S31266 S31725 S31726 S31727 S32053 S30600 S32654 S34565 S35045 S35030 N08367 N08925 N08926 N08904
A
Designation
Carbon 0.08 0.020 0.030 0.035 0.035 0.030 0.030 0.018 0.020 0.030 0.06– 0.05–0.10 0.030 0.020 0.020 0.020
max 0.10
Manganese 11.5– 1.00 2.00–4.00 2.00 2.00 1.00 1.00 2.0 2.0– 5.0– 1.50 1.50 2.00 1.00 2.00 2.00
14.5 4.0 7.0
Phosphorus 0.060 0.030 0.035 0.045 0.045 0.030 0.030 0.020 0.030 0.030 0.045 0.030 0.040 0.045 0.030 0.040
Sulfur. 0.030 0.015 0.020 0.030 0.030 0.030 0.010 0.020 0.005 0.010 0.015 0.015 0.030 0.030 0.010 0.030
Silicon 1.00 0.80 1.00 1.00 1.00 1.00 1.00 3.7–4.3 0.50 1.00 1.00 0.50–2.0 1.00 0.50 0.50 1.00
Nickel 2.3– 17.5– 21.0–24.0 13.5– 14.5– 14.5– 24.0– 14.0– 21.0– 16.0– 32.0– 22.5– 23.5– 24.0–26.0 24.0– 23.0–
3.7 18.5 17.5 17.5 16.5 26.0 15.5 23.0 18.0 37.0 27.5 25.5 26.0 28.0
Chromium 17.0– 19.5– 23.0–25.0 18.0– 17.0– 17.5– 22.0– 17.0– 24.0– 23.0– 25.0– 18.5–22.5 20.0– 19.0–21.0 19.0– 19.0–
19.0 20.5 20.0 20.0 19.0 24.0 18.5 25.0 25.0 29.0 22.0 21.0 23.0
Molybdenum . 6.0– 5.2–6.2 4.0– 4.0– 3.8– 5.0– 0.20 7.0– 4.0– . . . 6.0– 6.0–7.0 6.0– 4.0–
6.5 5.0 5.0 4.5 6.0 max 8.0 5.0 7.0 7.0 5.0
Titanium . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.15– . . . . . . . . . . . . . . .
0.60
Columbium . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.10 . . . 0.25–0.75 . . . . . . . . . . . .
max
Tantalum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
F
Nitrogen 0.20– 0.18– 0.35–0.60 0.20 0.10– 0.15– 0.17– 0.45– 0.40– . . . 0.05–0.15 0.18– 0.10–0.20 0.15– 0.10
0.40 0.25 max 0.20 0.21 0.22 0.55 0.60 0.25 0.25 max
Vanadium . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Copper . . . 0.50– 1.00–2.50 . . . . . . 2.8– . . . 0.50 0.30– . . . 0.75 2.5–3.5 0.75 0.80–1.50 0.50– 1.00–
1.00 4.0 max 0.60 max 1.50 2.00
Others . . . . . . W . . . . . . . . . . . . . . . . . . . . . Al . . . . . . . . . . . . . . .
1.50–2.50 0.15–
0.60
A
New designation established in accordance with Practice E527 and SAE J1086.
B
For small diameter or thin walls, or both, where many drawing passes are required, a carbon maximum of 0.040 % is necessary in grades TP 304L, TP 304LN, 316L and 316LN. Small outside diameter tubes are defined
as those with less than 0.500 in. [12.7 mm] in outside diameter and light walls are those less than 0.049 in. [1.2 mm] in minimum wall thickness.
C
Maximum, unless otherwise indicated. Where ellipses (. . .) appear in this table, there are no requirements and analysis for the element need not be determined or reported.
D
Grade TP 321 shall have a titanium content of not less than five times the sum of the carbon and nitrogen content and not more than 0.70 %.
E
Grade TP 348 shall have a columbium plus tantalum content of not less than ten times the carbon content and not more than 1.10 %.
F
The method of analysis for nitrogen shall be a matter of agreement between the purchaser and manufacturer.

A269/A269M − 24
TABLE 2 Heat Treatment and Hardness Requirements
3.1.6 Optional requirements (heat treatment, see Section 6;
hydrostatic or nondestructive electric test, see Section 10), Austenitizing
Grade UNS Number Temperature, min or Hardness, max
3.1.7 Test report required (see Section on Inspection of
range °F [°C]
Specification A1016/A1016M),
TP201 S20100 1900 [1040] 220 HBW/230 HV
3.1.8 Specification designation, and or 96 HRB
TP201LN S20153 1900 [1040] 250 HBW/263 HV
3.1.9 Special requirements and any supplementary require-
or 100 HRB
ments selected.
TP304 S30400 1900 [1040] 192 HBW/200 HV
or 90 HRB
TP304L S30403 1900 [1040] 192 HBW/200 HV
4. General Requirements
or 90 HRB
4.1 Material furnished under this specification shall con-
. . . S30416 1900 [1040] 217 HBW/230 HV
or 95 HRB
form to the applicable requirements of the current edition of
TP304LN S30453 1900 [1040] 192 HBW/200 HV
Specification A1016/A1016M, unless otherwise provided
or 90 HRB
herein.
TP316 S31600 1900 [1040] 192 HBW/200 HV
or 90 HRB
TP316L S31603 1900 [1040] 192 HBW/200 HV
5. Manufacture
or 90 HRB
5.1 The tubes shall be made by the seamless or welded TP316N S31653 1900 [1040] 192 HBW/200 HV
or 90 HRB
process.
. . . S31655 1900 [1040] 256 HBW
or 100 HRB
5.2 At the manufacturer’s option, tubing may be furnished
TP317 S31700 1900 [1040] 192 HBW/200 HV
either hot finished or cold finished.
or 90 HRB
. . . S31730 1900 [1040] 192 HBW/200 HV
6. Heat Treatment
or 90 HRB
TP321 S32100 1900 [1040] 192 HBW/200 HV
6.1 All material shall be furnished in the solution heat-
or 90 HRB
treated condition. Except as provided in 6.2, the heat-treatment TP347 S34700 1900 [1040] 192 HBW/200 HV
or 90 HRB
procedure shall consist of heating the material to a minimum
TP348 S34800 1900 [1040] 192 HBW/200 HV
temperature or temperature range as specified for the grade in
or 90 HRB
Table 2, followed by quenching in water or rapidly cooling by TPXM-10 S21900 1900 [1040] 269 HBW/285 HV
or 25 HRC
other means. Alternatively, for seamless tubes, immediately
TPXM-11 S21904 1900 [1040] 269 HBW/285 HV
following hot forming while the temperature of the tubes is not
or 25 HRC
TPXM-15 S38100 1900 [1040] 192 HBW/200 HV
less than the specified minimum solution treatment
or 90 HRB
temperature, tubes may be individually quenched in water or
TPXM-19 S20910 1900 [1040] 269 HBW/25 HV
rapidly cooled by other means.
or 25 HRC
TPXM-29 S24000 1900 [1040] 265 HBW/270 HV
6.2 Controlled structural or special service characteristics
or 100 HRB
shall be specified as a guide for the most suitable heat . . . SS31254 2100 [1150] 220 HBW/230 HV
or 96 HRB
treatment. If the final heat treatment is at a temperature under
. . . S31266 2100 [1150] 250 HBW/263 HV
1900 °F [1040 °C] and is so specified on the order, each tube
or 100 HRB
shall be stenciled with the final heat treatment temperature in . . . S31725 1900 [1040] 192 HBW/200 HV
or 90 HRB
degrees Fahrenheit [degrees Celsius] after the suffix “HT”.
. . . S31726 1900 [1040] 192 HBW/200 HV
or 90 HRB
6.3 A solution annealing temperature above 1950 °F [1065
. . . S31727 1975–2155 192 HBW/200 HV
°C] may impair the resistance to intergranular corrosion after
[10
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: A269/A269M − 22 A269/A269M − 24
Standard Specification for
Seamless and Welded Austenitic Stainless Steel Tubing for
General Service
This standard is issued under the fixed designation A269/A269M; 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*
1.1 This specification covers grades of nominal-wall-thickness, stainless steel tubing for general corrosion-resisting and low- or
high-temperature service, as designated in Table 1.
1.2 The tubing sizes and thicknesses usually furnished to this specification are ⁄4 in. [6.4 mm] in inside diameter and larger and
0.020 in. [0.51 mm] in nominal wall-thickness and heavier.
1.3 Mechanical property requirements do not apply to tubing smaller than ⁄8 in. [3.2 mm] in inside diameter or 0.015 in. [0.38
mm] in thickness.
NOTE 1—Additional testing requirements may apply for use in ASME B31.3 applications.
1.4 Optional supplementary requirements are provided and, when one or more of these are desired, each shall be so stated in the
order.
1.5 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, 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.
1.6 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.
2. Referenced Documents
2.1 ASTM Standards:
A262 Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels
A480/A480M Specification for General Requirements for Flat-Rolled Stainless and Heat-Resisting Steel Plate, Sheet, and Strip
A632 Specification for Seamless and Welded Austenitic Stainless Steel Tubing (Small-Diameter) for General Service
This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.10
on Stainless and Alloy Steel Tubular Products.
Current edition approved Nov. 1, 2022March 1, 2024. Published December 2022March 2024. Originally approved in 1944. Last previous edition approved in 20192022
as A269/A269M – 15a (2019).A269/A269M – 22. DOI: 10.1520/A0269_A0269M-22.10.1520/A0269_A0269M-24.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*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
A269/A269M − 24
C
TABLE 1 Chemical Requirements %
Composition, %
Grade TP TP TP TP TP TP TP TP TP TP TP TP TP TP TP TP TP
. . . . . .
201 201LN 304 304L 304LN 316 316L 316LN . . . 317 321 347 348 XM-10 XM-11 XM-15 XM-19
UNS
S20100 S20153 S30400 S30403 S30416 S30453 S31600 31603 S31653 S31655 S31700 S31730 S32100 S34700 S34800 S21900 S21904 S38100 S20910
A
Designation
B B B B
Carbon 0.15 0.03 0.08 0.035 0.030 0.035 0.08 0.035 0.035 0.030 0.08 0.030 0.08 0.08 0.08 0.08 0.04 0.08 0.06
Manganese 5.5– 6.4– 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 8.00– 8.00– 2.00 4.0–
7.5 7.5 10.00 10.00 6.0
Phosphorus 0.060 0.045 0.045 0.045 0.045 0.045 0.045 0.045 0.045 0.045 0.045 0.040 0.045 0.045 0.045 0.045 0.045 0.030 0.045
Sulfur 0.030 0.015 0.030 0.030 0.015 0.030 0.030 0.030 0.030 0.015 0.030 0.010 0.030 0.030 0.030 0.030 0.030 0.030 0.030
Silicon 1.00 0.75 1.00 1.00 0.80– 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.50– 1.00
2.00 2.50
Nickel 3.5– 4.0– 8.0– 8.0– 9.0– 8.0– 10.0– 10.0– 10.0– 8.0– 11.0– 15.0– 9.0– 9.0– 9.0– 5.5– 5.5– 17.5– 11.5–
5.5 5.0 11.0 12.0 11.0 11.0 14.0 15.0 13.0 9.5 15.0 16.5 12.0 12.0 12.0 7.5 7.5 18.5 13.5
Chromium 16.0– 16.0– 18.0– 18.0– 17.5– 18.0– 16.0– 16.0– 16.0– 19.5– 18.0– 17.0– 17.0– 17.0– 17.0– 19.0– 19.0– 17.0– 20.5–
18.0 17.5 20.0 20.0 19.5 20.0 18.0 18.0 18.0 21.5 20.0 19.0 19.0 19.0 19.0 21.5 21.5 19.0 23.5
Molybdenum . . . . . . . . . . . . 0.40– . . . 2.00– 2.00– 2.00– 0.5– 3.0– 3.0–4.0 . . . . . . . . . . . . . . . . . . 1.50–
0.80 3.00 3.00 3.00 1.5 4.0 3.00
D
Titanium . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
E
Columbium . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 × C . . . . . . . . . 0.10–
min 0.30
1.10
max
Tantalum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.10 . . . . . . . . . . . .
F
Nitrogen 0.25 0.10– . . . . . . 0.10 0.10– . . . . . . 0.10– 0.14– . . . 0.45 . . . . . . . . . 0.15– 0.15– . . . 0.20–
0.25 0.16 0.16 0.25 0.40 0.40 0.40
Vanadium . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.10–
0.30
Copper . . . 1.00 . . . . . . . . . . . . . . . . . . . . . 1.00 . . . 4.0–5.0 . . . . . . . . . . . . . . . . . . . . .
Others . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Co 0.20 . . . . . . . . . . . .
max
A269/A269M − 24
Composition, %
Grade TP
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
XM-29
UNS
A
S24000 S31254 S31266 S31725 S31726 S31727 S32053 S30600 S32654 S34565 S35045 S35030 N08367 N08925 N08926 N08904
A
Designation
Carbon 0.08 0.020 0.030 0.035 0.035 0.030 0.030 0.018 0.020 0.030 0.06– 0.05–0.10 0.030 0.020 0.020 0.020
max 0.10
Manganese 11.5– 1.00 2.00–4.00 2.00 2.00 1.00 1.00 2.0 2.0– 5.0– 1.50 1.50 2.00 1.00 2.00 2.00
14.5 4.0 7.0
Phosphorus 0.060 0.030 0.035 0.045 0.045 0.030 0.030 0.020 0.030 0.030 0.045 0.030 0.040 0.045 0.030 0.040
Sulfur. 0.030 0.015 0.020 0.030 0.030 0.030 0.010 0.020 0.005 0.010 0.015 0.015 0.030 0.030 0.010 0.030
Silicon 1.00 0.80 1.00 1.00 1.00 1.00 1.00 3.7–4.3 0.50 1.00 1.00 0.50–2.0 1.00 0.50 0.50 1.00
Nickel 2.3– 17.5– 21.0–24.0 13.5– 14.5– 14.5– 24.0– 14.0– 21.0– 16.0– 32.0– 22.5– 23.5– 24.0–26.0 24.0– 23.0–
3.7 18.5 17.5 17.5 16.5 26.0 15.5 23.0 18.0 37.0 27.5 25.5 26.0 28.0
Chromium 17.0– 19.5– 23.0–25.0 18.0– 17.0– 17.5– 22.0– 17.0– 24.0– 23.0– 25.0– 18.5–22.5 20.0– 19.0–21.0 19.0– 19.0–
19.0 20.5 20.0 20.0 19.0 24.0 18.5 25.0 25.0 29.0 22.0 21.0 23.0
Molybdenum . 6.0– 5.2–6.2 4.0– 4.0– 3.8– 5.0– 0.20 7.0– 4.0– . . . 6.0– 6.0–7.0 6.0– 4.0–
6.5 5.0 5.0 4.5 6.0 max 8.0 5.0 7.0 7.0 5.0
Titanium . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.15– . . . . . . . . . . . . . . .
0.60
Columbium . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.10 . . . 0.25–0.75 . . . . . . . . . . . .
max
Tantalum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
F
Nitrogen 0.20– 0.18– 0.35–0.60 0.20 0.10– 0.15– 0.17– 0.45– 0.40– . . . 0.05–0.15 0.18– 0.10–0.20 0.15– 0.10
0.40 0.25 max 0.20 0.21 0.22 0.55 0.60 0.25 0.25 max
Vanadium . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Copper . . . 0.50– 1.00–2.50 . . . . . . 2.8– . . . 0.50 0.30– . . . 0.75 2.5–3.5 0.75 0.80–1.50 0.50– 1.00–
1.00 4.0 max 0.60 max 1.50 2.00
Others . . . . . . W . . . . . . . . . . . . . . . . . . . . . Al . . . . . . . . . . . . . . .
1.50–2.50 0.15–
0.60
A
New designation established in accordance with Practice E527 and SAE J1086.
B
For small diameter or thin walls, or both, where many drawing passes are required, a carbon maximum of 0.040 % is necessary in grades TP 304L, TP 304LN, 316L and 316LN. Small outside diameter tubes are defined
as those with less than 0.500 in. [12.7 mm] in outside diameter and light walls are those less than 0.049 in. [1.2 mm] in minimum wall thickness.
C
Maximum, unless otherwise indicated. Where ellipses (. . .) appear in this table, there are no requirements and analysis for the element need not be determined or reported.
D
Grade TP 321 shall have a titanium content of not less than five times the sum of the carbon and nitrogen content and not more than 0.70 %.
E
Grade TP 348 shall have a columbium plus tantalum content of not less than ten times the carbon content and not more than 1.10 %.
F
The method of analysis for nitrogen shall be a matter of agreement between the purchaser and manufacturer.

A269/A269M − 24
A1016/A1016M Specification for General Requirements for Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless Steel
Tubes
E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
2.2 ASME Piping Code:
ASME B31.3 Process Piping
2.3 Other Standard:
SAE J1086 Practice for Numbering Metals and Alloys (UNS)
3. Ordering Information
3.1 Orders for material under this specification should include the following, as required, to describe the desired material
adequately:
3.1.1 Quantity (feet, metres, or number of lengths),
3.1.2 Name of material (seamless or welded tubes),
3.1.3 Grade (Table 1),
3.1.4 Size (outside diameter and nominal wall thickness),
3.1.5 Length (specific or random),
3.1.6 Optional requirements (heat treatment, see Section 6; hydrostatic or nondestructive electric test, see Section 10),
3.1.7 Test report required (see Section on Inspection of Specification A1016/A1016M),
3.1.8 Specification designation, and
3.1.9 Special requirements and any supplementary requirements selected.
4. General Requirements
4.1 Material furnished under this specification shall conform to the applicable requirements of the current edition of Specification
A1016/A1016M, unless otherwise provided herein.
5. Manufacture
5.1 The tubes shall be made by the seamless or welded process.
5.2 At the manufacturer’s option, tubing may be furnished either hot finished or cold finished.
6. Heat Treatment
6.1 All material shall be furnished in the solution heat-treated condition. Except as provided in 6.2, the heat-treatment procedure
shall consist of heating the material to a minimum temperature or temperature range as specified for the grade in Table 2, followed
by quenching in water or rapidly cooling by other means. Alternatively, for seamless tubes, immediately following hot forming
while the temperature of the tubes is not less than the specified minimum solution treatment temperature, tubes may be individually
quenched in water or rapidly cooled by other means.
6.2 Controlled structural or special service characteristics shall be specified as a guide for the most suitable heat treatment. If the
final heat treatment is at a temperature under 1900 °F [1040 °C] and is so specified on the order, each tube shall be stenciled with
the final heat treatment temperature in degrees Fahrenheit [degrees Celsius] after the suffix “HT”.
Available from American Society of Mechanical Engineers (ASME), ASME International Headquarters, Two Park Ave., New York, NY 10016-5990, http://
www.asme.org.
Available from Society of Automotive Engineers (SAE), 400 Commonwealth Dr., Warrendale, PA 15096-0001, http://www.sae.org.
A269/A269M − 24
TABLE 2 Heat Treatment and Hardness Requirements
Austenitizing
Grade UNS Number Temperature, min or Hardness, max
range °F [°C]
TP201 S20100 1900 [1040] 220 HBW/230 HV
or 96 HRB
TP201LN S20153 1900 [1040] 250 HBW/263 HV
or 100 HRB
TP304 S30400 1900 [1040] 192 HBW/200 HV
or 90 HRB
TP304L S30403 1900 [1040] 192 HBW/200 HV
or 90 HRB
. . . S30416 1900 [1040] 217 HBW/230 HV
or 95 HRB
TP304LN S30453 1900 [1040] 192 HBW/200 HV
or 90 HRB
TP316 S31600 1900 [1040] 192 HBW/200 HV
or 90 HRB
TP316L S31603 1900 [1040] 192 HBW/200 HV
or 90 HRB
TP316N S31653 1900 [1040] 192 HBW/200 HV
or 90 HRB
. . . S31655 1900 [1040] 256 HBW
or 100 HRB
TP317 S31700 1900 [1040] 192 HBW/200 HV
or 90 HRB
. . . S31730 1900 [1040] 192 HBW/200 HV
or 90 HRB
TP321 S32100 1900 [1040] 192 HBW/200 HV
or 90 HRB
TP347 S34700 1900 [1040] 192 HBW/200 HV
or 90 HRB
TP348 S34800 1900 [1040] 192 HBW/200 HV
or 90 HRB
TPXM-10 S21900 1900 [1040] 269 HBW/285 HV
or 25 HRC
TPXM-11 S21904 1900 [1040] 269 HBW/285 HV
or 25 HRC
TPXM-15 S38100 1900 [1040] 192 HBW/200 HV
or 90 HRB
TPXM-19 S20910 1900 [1040] 269 HBW/25 HV
or 25 HRC
TPXM-29 S24000 1900 [1040] 265 HBW/270 HV
or 100 HRB
. . . SS31254 2100 [1150] 220 HBW/230 HV
or 96 HRB
. . . S31266 2100 [1150] 250 HBW/263 HV
or 100 HRB
. . . S31725 1900 [1040] 192 HBW/200 HV
or 90 HRB
. . . S31726 1900 [1040] 192 HBW/200 HV
or 90 HRB
. . . S31727 1975–2155 192 HBW/200 HV
[1080–1180] or 90 HRB
. . . S
...