ASTM A269-10

Designation: A269 - 10

Seamless and welded pipes made of austenitic stainless steels for general purposes. Technical requirements 1

This standard is issued under the fixed designation A269. The number immediately following the designation indicates the year of original adoption or, if changed, the year of the latest version. A number in parentheses indicates the year of last reapproval. A superscript epsilon (ε) indicates an editorial change since the latest version or reapproval.

This standard has been approved for use by agencies of the United States Department of Defense.

1. Scope*

1.1 This standard applies to stainless steel pipes with a nominal wall thickness intended for use in conditions requiring corrosion resistance at low and high temperatures. For grade designations, see Table 1.

1.2 Pipes with an internal diameter of 0.25 inches (6.4 mm) or greater and with a wall thickness of 0.020 inches (0.51 mm) or greater are typically supplied to this standard.

1.3 Mechanical property requirements do not apply to pipes with an inside diameter less than 1/8 inch (3.2 mm) and a wall thickness less than 0.015 inch (0.38 mm).

NOTE 1: Additional testing requirements may apply to installations and products covered by ASME B31.3.

1.4 The standard provides for optional additional requirements. If one or more of them is desirable, each of them must be specified in the order.

1.5 Standard units are inch-pound units. Values given in parentheses are mathematical conversions to SI units and are provided for information only and are not considered standard.

2. Regulatory documentation

2.1 ASTM Standards : ²

A262 Method for Determining the Susceptibility of Austenitic Stainless Steels to Intergranular Corrosion

A370 Mechanical testing of steel products. Methods and definitions

1 This standard comes under the jurisdiction of Committee A01 on Steels, Stainless Steels, and Allied Alloys and is under the direct supervision of Subcommittee A01.10 on Stainless and Alloy Steel Tubular Products. The current edition was approved on April 1, 2010. Published in May 2010. The standard was first approved in 1944. The last previous edition was approved in 2008 under the designation A269 - 08. * A "Summary of Changes" section is provided at the end of this standard. 2 For referenced ASTM standards, visit the ASTM website (www.astm.org) or contact ASTM Customer Service at scrvice@astm.org. For information about the ASTM Standards Yearbook volume, see the Document Summary page of the ASTM website.

ASTM A269-10

A480/A480M Plate, sheet and strip, rolled from stainless and heat-resistant steel. General requirements

A632 Seamless and welded small diameter austenitic stainless steel tubes for general purposes - Specifications

A1016/A1016M Ferritic Alloy, Austenitic Alloy and Stainless Steel Tubes - General Requirements

E527 Method of Numerical Designation of Metals and Alloys (UNS)

ASME Rules

ASME B31.3 Process Piping ³

2.4 Other standards

SAE J1086 UNS Numerical Designation Practice for Metals and Alloys ⁴

Ordering information

3.1 To correctly describe the required material, orders for material according to this standard should include the following information:

3.1.1 Quantity (in feet, meters or pieces)

3.1.2 Name of material (seamless or welded pipes)

Brand (table 1)

3.1.4 Size (outside diameter and nominal wall thickness)

3.1.5 Length (measured or arbitrary)

3.1.6 Optional requirements (heat treatment, see Section 6, hydrostatic or non-destructive electrical testing, see Section 10)

3.1.7 Test report (see section on acceptance according to A1016/A1016M)

3.1.8 Designation of this standard, and

3.1.9 Special requirements and any additional requirements.

General requirements

4.1 Material supplied under this standard shall comply with the requirements of the current edition of A1016/A1016M unless otherwise specified in this standard.

Manufacturing

Pipes shall be manufactured using seamless or welded process.

At the manufacturer's choice, pipes can be supplied with a hot or cold finish.

3 Available from the American Society of Mechanical Engineers (ASME), ASME International Headquarters, Three Park Ave., New York, NY 10016-5990, www.asme.org. 4 Available from the Society of Automotive Engineers (SAE), 400 Commonwealth Dr., Warrendale, PA 15096-0001, www.sae.org.

ASTM A269-10

Table 1 - Requirements for chemical composition, %

Brand	Compound, %
	TP 201	TP 201LN	TP 304	TP 304L	TP 304LN	TP 316	TP 316L	TP316LN	TP 317	TP 321	TP 347	TP 348	TPXM-10	TPXM-11	TPXM-15	TPXM-19	TPXM-29
UNS A	S20100	S20153	S30400	S30403	S30453	S31600	S31603	S31653	S31700	S32100	S34700	S34800	S21900	S21904	S38100	S20910	S24000
C	≤0.15	≤0.03	≤0.08	≤0.035 V	≤0.035 V	≤0.08	≤0.035 V	≤0.035 V	≤0.08	≤0.08	≤0.08	≤0.08	≤0.08	≤0.04	≤0.08	≤0.06	≤0.08
Mn, max C	5.5-7.5	6.4-7.5	2.00	2.00	2.00	2.00	2.00	2.00	2.00	2.00	2.00	2.00	8.00-10.00	8.00-10.00	2.00	4.0-6.0	11.5-14.5
P, max	0,060	0.045	0.045	0.045	0.045	0.045	0.045	0.045	0.045	0.045	0.045	0.045	0.045	0.045	0,030	0.045	0,060
S, max	0,030	0,015	0,030	0,030	0,030	0,030	0,030	0,030	0,030	0,030	0,030	0,030	0,030	0,030	0,030	0,030	0,030
Si C	1.00	0.75	1.00	1.00	1.00	1.00	1.00	1.00	1.00	1.00	1.00	1.00	1.00	1.00	1.50-2.50	1.00	1.00
Ni	3.5-5.5	4.0-5.0	8.0-11.0	8.0-12.0	8.0-11.0	10.0-14.0	10.0-15.0	10.0-13.0	11.0-15.0	9.0-12.0	9.0-12.0	9.0-12.0	5.5-7.5	5.5-7.5	17.5-18.5	11.5-13.5	2.3-3.7
Cr	16.0-18.0	16.0-17.5	18.0-20.0	18.0-20.0	18.0-20.0	16.0-18.0	16.0-18.0	16.0-18.0	18.0-20.0	17.0-19.0	17.0-19.0	17.0-19.0	19.0-21.5	19.0-21.5	17.0-19.0	20.5-23.5	17.0-19.0
Mo	---	---	---	---	---	2.00-3.00	2.00-3.00	2.00-3.00	3.0-4.0	---	---	---	---	---	---	1.50-3.00	---
You	---	---	---	---	---	---	---	---	---	D	---	---	---	---	---	---	---
Nb	---	---	---	---	---	---	---	---	---	---	≥10xC ≤1.10	E	---	---	---	0.10-0.30	---
Ta, max	---	---	---	---	---	---	---	---	---	---	---	0.10	---	---	---	---	---
N F	0.25	0.10-0.25	---	---	0.10-0.16	---	---	0.10-0.16	---	---	---	---	0.15-0.40	0.15-0.40	---	0.20-0.40	0.20-0.40
V	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	0.10-0.30	---
Cu	---	1.00	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---
Others	---	---	---	---	---	---	---	---	---	---	---	Co≤ 0.20	---	---	---	---	---

ASTM A269-10

Table 1 (continued)

Brand	Compound, %
	---	---	---	---	---	---	---	---	---	---	---	---
UNS A	S31254	S31725	S31726	S31727	S32053	S30600 A	S32654	S34565	S35045	N08367	N08926	N08904
C	≤0.020	≤0.035	≤0.035	≤0.030	≤0.030	≤0.018	≤0.020	≤0.030	0.06-0.10	≤0.030	≤0.020	≤0.020
Mn, max C	1.00	2.00	2.00	1.00	1.00	2.0	2.0-4.0	5.0-7.0	1.50	2.00	2.00	2.00
P, max	0,030	0.045	0.045	0,030	0,030	0,020	0,030	0,030	0.045	0,040	0,030	0,040
S, max	0,015	0,030	0,030	0,030	0,010	0,020	0.005	0,010	0,015	0,030	0,010	0,030
Si C	0.80	1.00	1.00	1.00	1.00	3.7-4.3	0.50	1.00	1.00	1.00	0.50	1.00
Ni	17.5-18.5	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	23.5-25.5	24.0-26.0	23.0-28.0
Cr	19.5-20.5	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	20.0-22.0	19.0-21.0	19.0-23.0
Mo	6.0-6.5	4.0-5.0	4.0-5.0	3.8-4.5	5.0-6.0	≤0.20	7.0-8.0	4.0-5.0	---	6.0-7.0	6.0-7.0	4.0-5.0
You	---	---	---	---	---	---	---	---	0.15-0.60	---	---	---
Nb	---	---	---	---	---	---	---	≤0.10	---	---	---	---
Ta, max	---	---	---	---	---	---	---	---	---	---	---	---
N F	0.18-0.22	≤0.20	0.10-0.20	0.15-0.21	0.17-0.22	---	0.45-0.55	0.40-0.60	---	0.18-0.25	0.15-0.25	≤0.10
V	---	---	---	---	---	---	---	---	---	---	---	---
Cu	0.50-1.00	---	---	2.8-4.0	---	≤0.50	0.30-0.60	---	0.75	≤0.75	0.50-1.50	1.00-2.00
Others	---	---	---	---	---	---	---	---	A1 0.15-0.60	---	---	---

^A New designation in accordance with E 527 and SAE J1086.

^For small diameter, thin wall applications requiring multiple drawing passes, the carbon content limit for grades TP 304L, TP 304LN, 316L and 316LN is 0.040%. Small diameter pipe is defined as pipe with an outside diameter less than 0.500 in. (12.7 mm), and thin wall pipe is defined as pipe with a minimum wall thickness of less than 0.049 in. (1.2 mm).

^C Maximum value unless otherwise stated.

^D Brand TP 321 must have a titanium content of at least five times greater than the total content of carbon and nitrogen, but not more than 0.70% ^E

The TP 348 grade must have a total titanium and niobium content of at least 10 times the carbon content, but not more than 1.10% ^F

The method for determining nitrogen content is by agreement between the buyer and the manufacturer.

6. Heat treatment

6.1 All tubing shall be supplied in the heat treated condition. Except as provided in 6.2, heat treating shall consist of heating the material to a minimum temperature of 1900°F (1040°C) with water quenching or other rapid cooling. For exceptions, see 6.3 (Grades S31254 and S32654), 6.4 (Grade S24565), 6.8 (Grade N08367), 6.5 (Grade N08904), and 6.7 (Grade N08926). Alternatively, for seamless tubing, the tubing may be individually water quenched or rapidly cooled by other means immediately after hot working, before the tubing temperature falls below the specified minimum solution treating temperature.

6.2 The optimum heat treatment conditions shall be determined based on the specified design or special performance characteristics. If the final heat treatment temperature is below 1900°F and is specified in the order, each pipe shall be marked with that temperature and the suffix HT.

6.3 Materials of grades S31254 and S32654 shall be heat treated at a temperature not lower than 2100°F (1150°C) followed by water quenching or other rapid cooling.

6.4 Material grade S34565 shall be heat treated at 2050°F (1120°C) to 2140°F (1170°C) followed by water quenching or other rapid cooling.

6.5 Material grade T08904 shall be heat treated at a temperature not lower than 2000°F (1100°C) followed by water quenching or other rapid cooling.

6.6 For grades TP 321, TP 347, and TP 348, solution annealing temperatures above 1950°F [1065°C] may reduce intergranular corrosion resistance when exposed to sensitizing conditions. At the purchaser's direction, stabilization or re-solution annealing at a lower temperature shall be used following the initial high-temperature solution annealing. See Additional Requirement S3.

6.7 Material grade N08926 shall be heat treated at a temperature not lower than 2010°F (1100°C) followed by water quenching or other rapid cooling.

6.8 UNS N08367 material shall be solution annealed from a temperature not lower than 2025°F (1107°C) followed by rapid quenching.

6.9 Solution annealing of S35045 material consists of heating the material to a temperature of at least 2000°F (1093°C) for the required time and then cooling in still air or at a higher rate.

6.10 Materials of grades S31727 and S32053 shall be solution annealed in the temperature range of 1975 to 2155°F (1080 to 1180°C) followed by water quenching or other rapid cooling.

7. Chemical composition

7.1 The chemical composition of the steel must comply with the requirements specified in Table 1.

8. Product analysis

8.1 One billet, or one pipe, or one flat billet shall be analyzed from each heat. The chemical composition shall meet the established requirements.

8.2 The maximum deviations in the analysis of products shall comply with Table A1.1 of the A480/A480M standard. Deviations do not apply to the carbon content of materials with a specified maximum carbon content of 0.04%.

8.3 If the analysis is unsatisfactory, a repeat analysis shall be carried out on two additional blanks, flat blanks or tubes. The results of both repeat analyses for suspect elements shall meet the established requirements, otherwise all remaining material in the heat or batch shall be rejected, or, at the option of the manufacturer, each blank or tube shall be individually accepted. Blanks and tubes that do not meet the established requirements shall be rejected.

9. Mechanical tests

9.1 Expansion test (seamless pipes) . From each batch of finished pipes (see Note 2), samples taken from one end of one pipe are tested.

NOTE 2. The term "lot" refers to all tubes of the same nominal size and wall thickness, produced from the same heat of steel, before cut to size. If the final heat treatment is carried out in a batch furnace, the lot shall include only those tubes of the same size and of the same heat of material that are heat treated in the same batch. If the final heat treatment is carried out in a continuous furnace, or the material is quenched directly after hot working, the number of tubes of the same size and of the same heat of material in the lot shall be determined by the tube size in accordance with Table 2.

9.2 Flanging test (welded pipes) . From each batch of finished pipes (see Note 2) samples taken from one end of one pipe are tested.

9.3 Hardness Testing . Brinell hardness and Rockwell hardness shall be determined on specimens taken from two pipes of each lot. The term "lot" shall refer to all pipes of the same nominal diameter and wall thickness, manufactured from the same heat of steel, before cut to size. If the final heat treatment is carried out in a batch furnace, the lot shall include only those pipes of the same size and of the same heat of material that are heat treated in the same batch. If the final heat treatment is carried out in a continuous furnace, or the material is quenched directly after hot working, the lot shall include all pipes of the same size and of the same heat of material heat treated in the same furnace at the same temperature, residence time in the furnace and furnace speed; or all pipes of the same size and of the same heat of material quenched after hot working during the same production run.

Table 2 - Number of tubes in a batch heat treated in a continuous process or quenched immediately after hot deformation

Pipe size	Batch size
Outside diameter 2" or greater and wall thickness 0.200" (5.08 mm) or greater	No more than 50 pipes
1" to 2" OD or over 1" OD and wall thickness up to 0.200" (5.08mm)	No more than 75 pipes
Outside diameter 1 inch or less	No more than 125 pipes

Table 3 - Permissible deviations in dimensions

Group	Outside diameter, inches	Permissible deviations of the outside diameter, inches (mm)	Permissible deviations of wall thickness A , %	Tolerances for measured length, inches (mm) B		Thin-walled pipes C , with a nominal wall thickness less than specified, inches (mm)
				Plus	Minus
1	Before?	± 0.005 (0.13)	± 15	⅛ (3.2)	0	---
2	from ? to 1?, excl.	± 0.005 (0.13)	± 10	⅛ (3.2)	0	0.065 inches (1.65 mm)
3	from 1? to 3?, excl.	± 0.010 (0.25)	± 10	(4.8)	0	0.095 inches (2.41 mm)
4	from 3? to 5?, excl.	± 0.015 (0.38)	± 10	(4.8)	0	0.150 in (3.81 mm)
5	from 5? to 8, excl.	± 0.030 (0.76)	± 10	(4.8)	0	0.150 in (3.81 mm)
6	from 8 to 12, excl.	± 0.040 (1.01)	± 10	(4.8)	0	0.200 in (5.08 mm)
7	from 12 to 14, excl.	± 0.050 (1.26)	± 10	(4.8)	0	0.220 in (5.59 mm)

^A If pipe is ordered with a wall thickness of ? inch (19.0 mm) or greater, or with an inside diameter that is 60% or less of the outside diameter, wider wall thickness tolerances of up to ±12.5% are allowed.

For tubes with an internal diameter of less than ½ inch (12.7 mm), which cannot be drawn on a mandrel, the wall thickness deviation may be ± 15% of the specified one.

^These tolerances apply to measured lengths up to and including 24 feet (7.3 m). For lengths over 24 feet (7.3 m), the specified tolerances shall increase by ⅛ inch (3 mm) for every full or partial 10 feet (3 m), or by ½ inch (13 mm), whichever is less.

The provisions regarding ovality given in 12.2 ^apply .

9.4 When testing material from more than one heat, the requirements for expansion, flanging and hardness apply to each heat separately.

9.5 Reverse Flattening Test . Welded pipe shall be tested for reverse flattening on one specimen from every 1,500 feet (460 m) of finished pipe. Pipe in coils longer than 1,500 feet (450 m) shall be tested at both ends. The coil shall be continuous with no circumferential butt welds.

10. Hydrostatic or non-destructive electrical testing

10.1 Each pipe shall be subjected to non-destructive electrical or hydrostatic testing. The type of test shall be determined at the manufacturer's discretion, unless otherwise specified in the order.

11. Hardness requirements

11.1 Material grades TRHM-29, S34565, N08367 and N08926 shall have a hardness of no more than 256 HB/270 HV or 100 HRB. Material grades TRHM-10, TRHM-11 and TRHM-19 shall have a hardness of no more than 269 HB/285 HV or 25 HRC. Material grades S20100 and S31254

must have a hardness of no more than 220 HB/230 HV or 96 HRB. Material grades S20153 and S32654 must have a hardness of no more than 250 HB/263 HV or 100 HRB. Pipes made of material of all other grades must have a hardness of no more than 192 HB/200 HV or 90 HRB.

11.2 For pipes with a wall thickness of less than 0.065 inches (1.65 mm), it is permissible to use Rockwell or Vickers surface hardness testing. For Vickers testing, the values specified in 11.1 are valid. The surface hardness of grades TRHM-29 and S20153 shall not exceed 80 on a 30 T scale or 92 on a 15 T scale. For grades TRHM-10, TRHM-11 and TRHM-19, the surface hardness shall not exceed 46 on a 30 N scale or 73 on a 15 N scale. The hardness of the material of grades S20100 and S31254 shall not exceed 79 on a 30 T scale or 91 on a 15 T scale. The hardness of pipes made of material of all other grades shall not exceed 74 on a 30 T scale or 88 on a 15 T scale.

11.3 For pipe with an inside diameter less than ? in. (6.4 mm) or pipe with a wall thickness less than 0.020 in. (0.51 mm), hardness testing is not required (see A2.4 of A 370). Such pipe shall be subjected only to a tensile test in accordance with A 632.

12. Permissible deviations in dimensions

12.1 Deviations in the outside diameter, wall thickness and length must not exceed the values specified in Table 3.

12.2 The permissible deviations of the outside diameter according to Table 3 are insufficient to ensure possible ovality of thin-walled pipes according to the table. For such pipes, the largest and smallest diameters in one section should not differ from the nominal diameter by more than twice the permissible deviation of the outside diameter according to Table 3. However, the average diameter in this section should be within the permissible deviation.

13. Surface condition

13.1 The tubes are pickled to remove scale. If bright annealing is used, pickling is not required.

14. Product labeling

14.1 In addition to the data specified in A1016/A1016M, the marking shall include an indication whether the pipe is seamless or welded and the final heat treatment temperature in °F following the suffix HT if that temperature is less than 1900°F (1040°C).

14.2 If non-destructive electrical testing is carried out, each pipe shall be marked with the letters NDE. If a certificate is required, it shall also bear this designation.

15. Keywords

15.1 austenitic stainless steel; seamless steel tubes; stainless steel tubes; steel tubes; welded steel tubes.

ADDITIONAL REQUIREMENTS

The following additional requirements apply only if they are specified by the purchaser in the inquiry, contract or order.

S1. Tubes annealed for stress relief

S1.1 For use in certain corrosive environments, particularly chloride containing environments where stress corrosion cracking may occur, pipe grades TP 304L, TP 316L, TP 321, TP 347 and TP 348 may be ordered in a stress relief annealed condition.

S1.2 If stress relieved tubing is ordered, the tubing shall be heat treated after straightening at 1550 - 1650°F [845 - 900°C]. Cooling from this temperature range shall be accomplished either in air or by slow cooling. Mechanical straightening shall not be permitted after stress relief treatment.

S1.3 Straightness of pipes and additional details under this requirement shall be subject to agreement between the purchaser and the supplier.

S2. Pneumatic test

S2.1 Pipes shall be pneumatically tested (either underwater compressed air test or pneumatic leak test) in accordance with A1016/A1016M.

S3. Stabilizing heat treatment

S3.1 Following the solution annealing described in Section 6, grades TP 321, TP 347 and TP 348 material shall be subjected to a stabilizing heat treatment at a temperature lower than that used for the initial solution annealing. The temperature of the stabilizing heat treatment shall be agreed upon between the purchaser and seller.

S4. Intergranular corrosion test

S4.1 Where such a requirement exists, the material shall be subjected to intergranular corrosion tests carried out by the manufacturer in accordance with Standard A 262, Method E.

S4.2 For grades containing titanium or niobium, stabilising heat treatment in accordance with Additional Requirement S3 may be required and permitted to meet this requirement.

NOTE S4.1 - Method E specifies that testing of low carbon or stabilized grades is to be carried out in the sensitized condition and of other grades in the as-shipped condition.

SUMMARY OF CHANGES

Committee A01 has identified the locations of certain changes made to this standard since the last edition, A269-08, which may affect its application. (Approval date: 1 April 2010).

(1) Revised Additional Requirement S2 to account for two pneumatic testing methods in accordance with current ASTM standards.

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A. Itskovich

Director