ASTM A554-21

Standard Specification for Welded Stainless Steel Mechanical Tubing

ABSTRACT
This guide covers standard specification for welded stainless steel tubing for mechanical applications where appearance, mechanical properties, or corrosion resistance is needed. The tubes shall be made from flat-rolled steel by an automatic welding process without the addition of filler metal. Tubes shall be furnished in one of the following shapes - round, square, rectangular, or special. Heat analysis shall be performed wherein several grades of steel shall conform to the required chemical composition for carbon, manganese, phosphorus, sulfur, silicon, nickel, chromium, molybdenum, titanium, columbium, and tantalum.
SCOPE
1.1 This specification covers welded austenitic, ferritic, and austenitic-ferritic duplex stainless steel mechanical tubing intended for use in ornamental, structural, exhaust, and other applications where appearance, mechanical properties, or corrosion resistance is needed. The grades covered are listed in Table 1.  
1.2 This specification covers as-welded or cold-reduced mechanical tubing in sizes to 16 in. (406.4 mm) outside dimension, and in wall thicknesses 0.020 in. (0.51 mm) and over.  
1.3 Tubes shall be furnished in one of the following shapes as specified by the purchaser: round, square, rectangular, or special.  
1.4 Supplementary requirements of an optional nature are provided and when desired shall be so stated in the order.  
1.5 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.  
1.6 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.

General Information

• Status: Published
• Publication Date: 28-Feb-2021
• ICS: 23.040.10 - Iron and steel pipes
• ICS: 23.040.40 - Metal fittings
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.10 - Stainless and Alloy Steel Tubular Products

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:A554 −21
Standard Specification for
1
Welded Stainless Steel Mechanical Tubing
This standard is issued under the fixed designation A554; 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* A790/A790M Specification for Seamless and Welded
Ferritic/Austenitic Stainless Steel Pipe
1.1 This specification covers welded austenitic, ferritic, and
A941 TerminologyRelatingtoSteel,StainlessSteel,Related
austenitic-ferritic duplex stainless steel mechanical tubing
Alloys, and Ferroalloys
intended for use in ornamental, structural, exhaust, and other
E527 Practice for Numbering Metals and Alloys in the
applications where appearance, mechanical properties, or cor-
Unified Numbering System (UNS)
rosion resistance is needed. The grades covered are listed in
2.2 Military Standards:
Table 1.
3
MIL-STD-129 Marking for Shipment and Storage
1.2 This specification covers as-welded or cold-reduced
MIL-STD-163 Steel Mill Products Preparation for Shipment
mechanical tubing in sizes to 16 in. (406.4 mm) outside 3
and Storage
dimension, and in wall thicknesses 0.020 in. (0.51 mm) and
2.3 Federal Standard:
over. 3
Fed. Std. No. 123 Marking for Shipments (Civil Agencies)
1.3 Tubes shall be furnished in one of the following shapes
2.4 SAE Standard:
4
as specified by the purchaser: round, square, rectangular, or
SAE J 1086 Numbering Metals and Alloys
special.
3. Terminology
1.4 Supplementary requirements of an optional nature are
3.1 Definitions—For definitions of terms used in this
provided and when desired shall be so stated in the order.
specification, refer to Terminology A941.
1.5 The values stated in inch-pound units are to be regarded
as standard. The values given in parentheses are mathematical
4. Ordering Information
conversions to SI units that are provided for information only
4.1 Orders for material under this specification should
and are not considered standard.
include the following, as required, to describe the desired
1.6 This international standard was developed in accor-
material adequately:
dance with internationally recognized principles on standard-
4.1.1 Quantity (feet, mass, or number of pieces),
ization established in the Decision on Principles for the
4.1.2 Name of material (welded stainless steel mechanical
Development of International Standards, Guides and Recom-
tubing),
mendations issued by the World Trade Organization Technical
4.1.3 Form (round, square, rectangular, special, see 1.3),
Barriers to Trade (TBT) Committee.
4.1.4 Dimensions:
4.1.4.1 Round-outside diameter and wall thickness for all
2. Referenced Documents
conditions (Section 9). Alternatively, for cold-reduced
2
2.1 ASTM Standards:
condition, outside diameter and inside diameter or inside
A370 Test Methods and Definitions for Mechanical Testing
diameter and wall dimensions may be specified,
of Steel Products
4.1.4.2 Square and rectangular outside dimensions and wall
A751 Test Methods and Practices for Chemical Analysis of
thickness (see 10.1),
Steel Products
4.1.4.3 Special (to be specified),
4.1.5 Length (mill lengths, cut lengths, or multiple lengths
1
This specification is under the jurisdiction ofASTM Committee A01 on Steel,
(see 9.3)),
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
4.1.6 Grade (Table 1),
A01.10 on Stainless and Alloy Steel Tubular Products.
4.1.7 Condition (see 7.1),
Current edition approved March 1, 2021. Published March 2021. Originally
approved in 1965. Last previous edition approved in 2016 as A554 – 16. DOI:
10.1520/A0554-21.
2 3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or AvailablefromStandardizationDocumentsOrderDesk,Bldg.4SectionD,700
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Robbins Ave., Philadelphia, PA 19111–5094, Attn: NPODS.
4
Standards volume information, refer to the standard’s Document Summary page on Available from SAE International (SAE), 400 Commonwealth Dr.,Warrendale,
the ASTM website. 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
1

---------------------- Page: 1 ----------------------
A554−21
2
A
TABLE 1 Chemical Requirements
Composition, %
J
UNS # Grade
Carbon Manga- Phos- Sulfur Silicon Nickel Chromium Molybdenum Titanium Columbium Nitrogen Copper Other
nese, phor
...

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: A554 − 16 A554 − 21
Standard Specification for
1
Welded Stainless Steel Mechanical Tubing
This standard is issued under the fixed designation A554; 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 welded austenitic, ferritic, and austenitic-ferritic duplex stainless steel mechanical tubing intended
for use in ornamental, structural, exhaust, and other applications where appearance, mechanical properties, or corrosion resistance
is needed. The grades covered are listed in Table 1.
1.2 This specification covers as-welded or cold-reduced mechanical tubing in sizes to 16 in. (406.4 mm) outside dimension, and
in wall thicknesses 0.020 in. (0.51 mm) and over.
1.3 Tubes shall be furnished in one of the following shapes as specified by the purchaser: round, square, rectangular, or special.
1.4 Supplementary requirements of an optional nature are provided and when desired shall be so stated in the order.
1.5 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.
1.6 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
2.1 ASTM Standards:
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A751 Test Methods and Practices for Chemical Analysis of Steel Products
A790/A790M Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe
A941 Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroalloys
E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
2.2 Military Standards:
3
MIL-STD-129 Marking for Shipment and Storage
3
MIL-STD-163 Steel Mill Products Preparation for Shipment and Storage
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 A01.10
on Stainless and Alloy Steel Tubular Products.
Current edition approved March 1, 2016March 1, 2021. Published March 2016March 2021. Originally approved in 1965. Last previous edition approved in 20152016 as
A554A554 – 16.–15a. DOI: 10.1520/A0554-16.10.1520/A0554-21.
2
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.
3
Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700 Robbins Ave., Philadelphia, PA 19111–5094, Attn: NPODS.
*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
1

---------------------- Page: 1 ----------------------
A554 − 21
2
A
TABLE 1 Chemical Requirements
Composition, %
J
UNS # Grade
Carbon Manga- Phos- Sulfur Silicon Nickel Chromium Molybdenum Titanium Columbium Nitrogen Copper Other
nese, phorus
Austenitic
MT-301 0.15 2.00 0.045 0.030 1.00 6.0–8.0 16.0–18.0 . . .
MT-302 0.15 2.00 0.045 0.030 1.00 8.0–10.0 17.0–19.0 . . .
MT-304 0.08 2.00 0.045 0.030 1.00 8.0–11.0 18.0–20.0 . . .
B
MT-304L 0.035 2.00 0.045 0.030 1.00 8.0–13.0 18.0–20.0 . . .
MT-305 0.12 2.00 0.045 0.030 1.00 10.0–13.0 17.0–19.0 . . .
MT-309S 0.08 2.00 0.045 0.030 1.00 12.0–15.0 22.0–24.0 . . . . .
C
MT-309S-Cb 0.08 2.00 0.045 0.030 1.00 12.0–15.0 22.0–24.0 . .
MT-310S 0.08 2.00 0.045 0.030 1.00 19.0–22.0 24.0–26.0 . . .
MT-316 0.08 2.00 0.045 0.030 1.00 10.0–14.0 16.0–18.0 2.0–3.0 . .
B
MT-316L 0.035 2.00 0.045 0.030 1.00 10.0–15.0 16.0–18.0 2.0–3.0 . .
S31655 . 0.030 2.00 0.045 0.015 1.00 8.0–9.5 19.5–21.5 0.50–1.50 . . 0.14–0.25 1.00 .
MT-317 0.08 2.00 0.045 0.030 1.00 11.0–14.0 18.0–20.0 3.0–4.0 . .
D
MT-321 0.08 2.00 0.045 0.030 1.00 9.0–13.0 17.0–20.0 . .
MT-330 0.15 2.00 0.040 0.030 1.00 33.0–36.0 14.0–16.
...