ASTM-A268/A268M, 2022

ASTM

A268/A268M-22 Standard Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service

Edition: 2022

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Description of ASTM-A268/A268M 2022

ASTM A268/A268M-22

Historical Standard: Standard Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service

ASTM A268/A268M

Scope

1.1 This specification2 covers a number of grades of nominal-wall-thickness, stainless steel tubing for general corrosion-resisting and high-temperature service. Most of these grades are commonly known as the “straight-chromium” types and are characterized by being ferromagnetic. Two of these grades, TP410 and UNS S 41500 (Table 1), are amenable to hardening by heat treatment, and the high-chromium, ferritic alloys are sensitive to notch-brittleness on slow cooling to ordinary temperatures. These features should be recognized in the use of these materials.

TABLE 1 Continued
Grade	TP439	. . .	. . .	TP430 Ti	TP XM-27	TP XM-33^A	18Cr-2Mo	29-4	29-4-2	26-3-3	25-4-4	...	. . .	. . .	. . .	. . .	TP468
UNS Designation	S43035	S43932	S41500^B	S43036	S44627	S44626	S44400	S44700	S44800	S44660	S44635	S44735	S32803	S40977	S43940	S42035	S46800
Element	Composition, %
C, max	0.07	0.030	0.05	0.10	0.01^A	0.06	0.025	0.010	0.010	0.030	0.025	0.030	0.015^C	0.03	0.03	0.08	0.030
Mn, max	1.00	1.00	0.5–1.0	1.00	0.40	0.75	1.00	0.30	0.30	1.00	1.00	1.00	0.5	1.50	1.00	1.00	1.00
P, max	0.040	0.040	0.03	0.040	0.02	0.040	0.040	0.025	0.025	0.040	0.040	0.040	0.020	0.040	0.040	0.045	0.040
S, max	0.030	0.030	0.03	0.030	0.02	0.020	0.030	0.020	0.020	0.030	0.030	0.030	0.005	0.015	0.015	0.030	0.030
Si, max	1.00	1.00	0.60	1.00	0.40	0.75	1.00	0.20	0.20	1.00	0.75	1.00	0.50	1.00	1.00	1.00	1.00
Ni	0.50 max	0.50	3.5–5.5	0.75 max	0.5^D max	0.50 max	1.00 max	0.15 max	2.0–2.5	1.0–3.50	3.5–4.5	1.00 max	3.0–4.0	0.30–1.00	. . .	1.0–2.5	0.50
Cr	17.00–	17.0–19.0	11.5–14.0	16.00–	25.0–27.5	25.0–27.0	17.5–19.5	28.0–30.0	28.0–30.0	25.0–28.0	24.5–26.0	28.00–	28.0– 29.0	10.50– 12.50	17.50– 18.50	13.5– 15.5	18.00– 20.00
	19.00			19.50								30.00
Mo	...	...	0.5–1.0	...	0.75–1.50	0.75–1.50	1.75–2.50	3.5–4.2	3.5–4.2	3.0–4.0	3.5–4.5	3.60–4.20	1.8–2.5	. . .	. . .	0.2–1.2	. . .
Al, max	0.15	0.15	. . .	...	...	...	...	...	...	...	...	...	. . .	. . .	. . .	. . .	. . .
Cu, max	...	...	. . .	...	0.2	0.20	...	0.15	0.15	...	...	...	. . .	. . .	. . .	. . .	. . .
N, max	0.04	0.030	. . .	...	0.015	0.040	0.035	0.020^E	0.020^E	0.040	0.035	0.045	0.020	0.030	. . .	. . .	0.030
Ti	0.20 + 4 (C		. . .	5 × C min;	...	7 × (C + N)	...	...	...	...	...	...	. . .	. . .	0.10–0.60	0.30–0.50	0.07–0.30
	+ N) min;			0.75 max		but no less
	1.10 max					than 0.20
						min; 1.00
						max

Nb^G	...		. . .	...	0.05–0.20	...	...	...	...	...	...	...	0.15– 0.50^F	. . .	(3 × %C + 0.30) min	. . .	0.10–0.60
Other		(Ti + Nb) = {0.20 + 4 × (C + N)} min.; 0.75 max					(Ti + Nb) = 0.020 + 4 × (C + N) min; 0.80 max			(Ti + Nb) = 0.20–1.00 and 6 × (C + N) min	(Ti + Nb) = 0.020 + 4 × (C + N) min; 0.80 max	(Ti + Nb) = 0.020– 1.00 and 6 × (C + N) min					(Ti + Nb) = 0.020 + 4 × (C + N) min; 0.80 max

1.2 An optional supplementary requirement is provided, and when desired, shall be so stated in the order.

1.3 The values stated in either inch-pound units or SI 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.

1.4 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.

Keywords

ferritic stainless steel; seamless steel tube; stainless steel tube; steel tube; welded steel tube;

ICS Code

ICS Number Code 23.040.10 (Iron and steel pipes)

DOI: 10.1520/A0268_A0268M-22

The following editions for this book are also available...

Year	Publisher	Type	Title	Annual Price
2003	ASTM	Model Standard	A268/A268M-03 Standard Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service	$103.58	Buy
2000	ASTM	Model Standard	A268/A268M-00a Standard Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service	$103.58	Buy
2001	ASTM	Model Standard	A268/A268M-01 Standard Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service	$103.58	Buy
2004	ASTM	Model Standard	A268/A268M-04 Standard Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service	$103.58	Buy
2005	ASTM	Model Standard	A268/A268M-05 Standard Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service	$103.58	Buy
2005	ASTM	Model Standard	A268/A268M-05a Standard Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service	$103.58	Buy
2004	ASTM	Model Standard	A268/A268M-04a Standard Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service	$103.58	Buy
2010	ASTM	Model Standard	A268/A268M-10 Standard Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service	$103.58	Buy
1996	ASTM	Model Standard	A268/A268M-96 Standard Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service	$103.58	Buy
2020	ASTM	Model Standard	A268/A268M-20 Standard Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service	$103.58	Buy
2016	ASTM	Model Standard	A268/A268M-10(2016) Standard Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service	$103.58	Buy
2024	ASTM	Model Standard	A268/A268M-24 Standard Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service	$86.11	Buy
2024	ASTM	Model Standard	A268/A268M-24 Standard Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service (Redline)	$103.58	Buy

This book also exists in the following packages...

Year	Publisher	Title		Annual Price
VAR	ASTM	ASTM Volume 01.01 Steel-Piping, Tubing, Fittings	[+]	$1,065.94	Buy
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	2003	ASTM	A105/A105M-03 Standard Specification for Carbon Steel Forgings for Piping Applications
	2005	ASTM	A105/A105M-05 Standard Specification for Carbon Steel Forgings for Piping Applications
	1998	ASTM	A105/A105M-98 Standard Specification for Carbon Steel Forgings for Piping Applications
	2004	ASTM	A106/A106M-04 Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Service
	2004	ASTM	A106/A106M-04a Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Service
	2004	ASTM	A106/A106M-04b Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Service
	2006	ASTM	A106/A106M-06 Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Service
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VAR	ASTM	ASTM Section 1 - Iron and Steel Products	[+]	$5,898.91	Buy
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	2001	ASTM	A1003/A1003M-01 Standard Specification for Steel Sheet, Carbon, Metallic- and Nonmetallic-Coated for Cold-Formed Framing Members
	2002	ASTM	A1003/A1003M-02 Standard Specification for Steel Sheet, Carbon, Metallic- and Nonmetallic-Coated for Cold-Formed Framing Members
	2002	ASTM	A1003/A1003M-02a Standard Specification for Steel Sheet, Carbon, Metallic- and Nonmetallic-Coated for Cold-Formed Framing Members
	2005	ASTM	A1003/A1003M-05 Standard Specification for Steel Sheet, Carbon, Metallic- and Nonmetallic-Coated for Cold-Formed Framing Members
	2008	ASTM	A1003/A1003M-08 Standard Specification for Steel Sheet, Carbon, Metallic- and Nonmetallic-Coated for Cold-Formed Framing Members
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	2001	ASTM	A1008/A1008M-01a Standard Specification for Steel, Sheet, Cold-Rolled, Carbon, Structural, High-Strength Low-Alloy and High-Strength Low-Alloy with Improved Formability
	2002	ASTM	A1008/A1008M-02 Standard Specification for Steel, Sheet, Cold-Rolled, Carbon, Structural, High-Strength Low-Alloy and High-Strength Low-Alloy with Improved Formability
	2003	ASTM	A1008/A1008M-03 Standard Specification for Steel, Sheet, Cold-Rolled, Carbon, Structural, High-Strength Low-Alloy and High-Strength Low-Alloy with Improved Formability
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Description of ASTM-A268/A268M 2022

ASTM A268/A268M-22

Historical Standard: Standard Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service

ASTM A268/A268M

The following editions for this book are also available...

This book also exists in the following packages...

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Description of ASTM-A268/A268M 2022

ASTM A268/A268M-22

Historical Standard: Standard Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service

ASTM A268/A268M

The following editions for this book are also available...

This book also exists in the following packages...

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