ASTM A789/A789M-24

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: A789/A789M − 22 A789/A789M − 24
Standard Specification for
Seamless and Welded Ferritic/Austenitic Stainless Steel
Tubing for General Service
This standard is issued under the fixed designation A789/A789M; 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 average wall thickness, or, if specified on the order, minimum wall thickness, of stainless
steel tubing for services requiring general corrosion resistance, with particular emphasis on resistance to stress corrosion cracking.
These steels are susceptible to embrittlement if used for prolonged periods at elevated temperatures.
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. Within the text, the SI units are shown in brackets. 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 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:
A480/A480M Specification for General Requirements for Flat-Rolled Stainless and Heat-Resisting Steel Plate, Sheet, and Strip
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 SAE Standard:
SAE J 1086 Practice for Numbering Metals and Alloys (UNS)
3. Ordering Information
3.1 Orders for product 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),
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 March 1, 2022March 1, 2024. Published March 2022March 2024. Originally approved in 1981. Last previous edition approved in 20202022 as
A789/A789M – 20.A789/A789M – 22. DOI: 10.1520/A0789_A0789M-22.10.1520/A0789_A0789M-24.
For ASME Boiler and Pressure Vessel Code applications, see related Specification SA–789 in Section II of that Code.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
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
A789/A789M − 24
3.1.2 Name of product (seamless or welded tubes),
3.1.3 Grade (see Table 1),
3.1.4 Size (outside diameter and average wall thickness, unless minimum wall thickness is specified),
3.1.5 Length (specific or random),
3.1.6 Optional requirements (for product analysis, see Section 8; for hydrostatic or nondestructive electric test, see Section 10),
3.1.7 Test report required (see the Inspection section of Specification A1016/A1016M),
3.1.8 Specification designation, and
3.1.9 Special requirements.
4. General Requirements
4.1 Product furnished under this specification shall conform to the applicable requirements of Specification A1016/A1016M,
unless otherwise provided herein.
5. Manufacture
5.1 The tubes shall be made by the seamless or welded process with no filler metal added.
6. Heat Treatment
6.1 All tubes shall be furnished in the heat-treated condition in accordance with the procedures shown in Table 2. For seamless
A
TABLE 1 Chemical Requirements
UNS
C Mn P S Si Ni Cr Mo N Cu Others
B
Designation
S31200 0.030 2.00 0.045 0.030 1.00 5.5–6.5 24.0–26.0 1.20–2.00 0.14–0.20 . . . . . .
S31260 0.030 1.00 0.030 0.030 0.75 5.5–7.5 24.0–26.0 2.5–3.5 0.10–0.30 0.20–0.80 W 0.10–0.50
S31500 0.030 1.20–2.00 0.030 0.030 1.40–2.00 4.3–5.2 18.0–19.0 2.50–3.00 0.05–0.1 . . . . . .
S31803 0.030 2.00 0.030 0.020 1.00 4.5–6.5 21.0–23.0 2.5–3.5 0.08–0.20 . . . . . .
S32001 0.030 4.00–6.00 0.040 0.030 1.00 1.0–3.0 19.5–21.5 0.60 0.05–0.17 1.00 . . .
S32003 0.030 2.00 0.030 0.020 1.00 3.0-4.0 19.5-22.5 1.50-2.00 0.14-0.20 . . . . . .
S32101 0.040 4.0-6.0 0.040 0.030 1.00 1.35-1.70 21.0-22.0 0.10-0.80 0.20-0.25 0.10-0.80 . . .
S32202 0.030 2.00 0.040 0.010 1.00 1.00–2.80 21.5–24.0 0.45 0.18–0.26 . . . . . .
S32205 0.030 2.00 0.030 0.020 1.00 4.5–6.5 22.0–23.0 3.0–3.5 0.14–0.20 . . . . . .
S32304 0.030 2.50 0.040 0.040 1.00 3.0–5.5 21.5–24.5 0.05–0.60 0.05–0.20 0.05–0.60 . . .
S32506 0.030 1.00 0.040 0.015 0.90 5.5–7.2 24.0–26.0 3.0–3.5 0.08–0.20 . . . W 0.05–0.30
S32520 0.030 1.50 0.035 0.020 0.80 5.5–8.0 23.0–25.0 3.–5. 0.20–0.35 0.50–3.00 . . .
S32550 0.04 1.50 0.040 0.030 1.00 4.5–6.5 24.0–27.0 2.9–3.9 0.10–0.25 1.50–2.50 . . .
S32707 0.030 1.50 0.035 0.010 0.50 5.5–9.5 26.0–29.0 4.0–5.0 0.30–0.50 1.0 max Co 0.5–2.0
C
S32750 0.030 1.20 0.035 0.020 0.80 6.0–8.0 24.0–26.0 3.0–5.0 0.24–0.32 0.50 . . .
D
S32760 0.030 1.00 0.030 0.010 1.00 6.0–8.0 24.0–26.0 3.0–4.0 0.20–0.30 0.50–1.00 W 0.50–1.00
S32808 0.030 1.10 0.030 0.010 0.50 7.0–8.2 27.0–27.9 0.80–1.20 0.30–0.40 . . . W 2.10–2.50
S32900 0.08 1.00 0.040 0.030 0.75 2.5–5.0 23.0–28.0 1.00–2.00 . . . . . . . . .
S32906 0.030 0.80–1.50 0.030 0.030 0.80 5.8–7.5 28.0 –30.0 1.50–2.60 0.30–0.40 0.80 . . .
S32950 0.030 2.00 0.035 0.010 0.60 3.5–5.2 26.0–29.0 1.00–2.50 0.15–0.35 . . . . . .
S33207 0.030 1.50 0.035 0.010 0.80 6.0–9.0 29.0–33.0 3.0–5.0 0.40–0.60 1.0 . . .
S39274 0.030 1.00 0.030 0.020 0.80 6.0–8.0 24.0–26.0 2.5–3.5 0.24–0.32 0.20–0.80 W 1.50–2.50
S39277 0.025 0.80 0.025 0.002 0.80 6.5–8.0 24.0–26.0 3.00–4.00 0.23–0.33 1.20–2.00 W 0.80–1.21
S82011 0.030 2.0–3.0 0.040 0.020 1.00 1.00–2.00 20.5–23.5 0.10–1.00 0.15–0.27 0.50 . . .
S82031 0.05 2.50 0.040 0.005 0.80 2.0–4.0 19.0–22.0 0.60–1.40 0.14–0.24 1.00 . . .
S82441 0.030 2.50–4.00 0.035 0.005 0.70 3.0–4.5 23.0–25.0 1.00–2.00 0.20–0.30 0.10–0.80 . . .
S83071 0.030 0.50–1.50 0.030 0.020 0.50 6.0–8.0 29.0–31.0 3.0–4.0 0.28–0.40 0.80 . . .
S83072 0.030 0.50–1.50 0.030 0.030 0.30 6.0–8.0 28.5–30.5 0.7–1.7 0.35–0.45 0.5 W 3.0–4.0
A
Maximum, unless a range or minimum is indicated. Where ellipses (.) appear in this table, there is no minimum and analysis for the element need not be determined
or reported.
B
Designation established in accordance with Practice E527 and SAE J1086.
C
% Cr + 3.3 × % Mo + 16 × % N $ 41.
D
% Cr + 3.3 × (% Mo + 1/2 %W) + 16 × % N $ 41.
A789/A789M − 24
TABLE 2 Heat Treatment
UNS Designation Temperature °F [°C] Quench
S31200 1920–2010 rapid cooling in water
[1050–1100]
S31260 1870–2010 rapid cooling in water
[1020–1100] or by other means
S31500 1800–1900 rapid cooling in water
[980–1040] or by other means
S31803 1870–2010 rapid cooling in water
[1020–1100] or by other means
S32001 1800–1950 rapid cooling in water
[982–1066] or by other means
S32003 1850–2050 rapid cooling in water
[1010–1120] or by other means
S32101 1870 [1020] min rapid cooling in water
or by other means
S32202 1870–1975 rapid cooling in water
[1020–1080] or by other means
S32205 1870–2010 rapid cooling in water
[1020–1100] or by other means
S32304 1700–1920 rapid cooling in water
[925–1050] or by other means
S32506 1870–2050 rapid cooling in water
[1020–1120] or by other means
S32520 1975–2050 rapid cooling in water
[1080–1120] or by other means
S32550 1900 rapid cooling in water
[1040] min or by other means
S32707 1975–2050 rapid cooling in water
[1080–1120] or by other means
S32750 1880–2060 rapid cooling in water
[1025–1125] or by other means
S32760 1960–2085 rapid cooling in water
[1070–1140] or by other means
S32808 1920–2100 rapid cooling in water
[1050–1150] or by other means
S32900 1700–1750 rapid cooling in water
[925–955] or by other means
S32906 1870–2100 rapid cooling in water
[1020–1150] or by other means
S32950 1820–1880 air cool
[990–1025]
S33207 1905–2085 rapid cooling in water
[1040–1140] or by other means
S39274 1920–2060 rapid cooling in water
[1050–1125] or by other means
S39277 1975–2155 rapid cooling in water
[1080–1180] or by other means
S82011 1850–2050 rapid cooling in water
[1010–1120] or by other means
S82031 1830 [1000] min rapid cooling in water
or by other means
S82441 1830 [1000] min rapid cooling in water
or by other means
S83071 1830–2100 rapid cooling in water
[1000–1150] or by other means
S83072 1830–2100 rapid cooling in water
[1000–1150] or by other means
tubes, as an alternate to final heat treatment in a continuous furnace or batch-type furnace, 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.
7. Chemical Composition
7.1 The steel shall conform to the chemical requirements prescribed in Table 1.
8. Product Analysis
8.1 An analysis of either one billet or one length of flat-rolled stock or one tube shall be made from each heat. The chemical
composition thus determined shall conform to the requirements specified.
A789/A789M − 24
8.2 A product analysis tolerance (see the annex table on Chemical Requirements (Product Analysis Tolerances) in Specification
A480/A480M) shall apply. The product analysis tolerance is not applicable to the carbon content for material with a specified
maximum carbon of 0.04 % or less.
8.3 If the original test for product analysis fails, retests of two additional billets, lengths of flat-rolled stock, or tubes shall be made.
Both retests for the elements in question shall meet the requirements of this specification; otherwise, all remaining material in the
heat shall be rejected or, at the option of the producer, each billet or tube may be individually tested for acceptance. Billets, lengths
of flat-rolled stock, or tubes that do not meet the requirements of this specification shall be rejected.
NOTE 1—For flange and flaring requirements, the term lot applies to all tubes prior to cutting of the same nominal size and wall thickness that are produced
from the same heat of steel. When final heat treatment is in a batch-type furnace, a lot shall include only those tubes of the same size and from the same
heat that a
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