NOTICE: This standard has either been superceded and replaced by a new version or discontinued.

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Used in USDOE-NE Standards

Designation: A 249/A 249M – 03

Standard Specification for

Welded Austenitic Steel Boiler, Superheater, Heat-
Exchanger, and Condenser Tubes1
This standard is issued under the fixed designation A 249/A 249M; 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 (e) indicates an editorial change since the last revision or reapproval.

1. Scope* responsibility of the user of this standard to establish appro-

1.1 This specification2 covers nominal-wall-thickness priate safety and health practices and determine the applica-
welded tubes made from the austenitic steels listed in Table 1, bility of regulatory limitations prior to use. A specific warning
with various grades intended for such use as boiler, super- statement is given in Supplementary Requirement S7, Note
heater, heat exchanger, or condenser tubes. S7.1.
1.2 Grades TP304H, TP309H, TP309HCb, TP310H, 2. Referenced Documents
TP310HCb, TP316H, TP321H, TP347H, and TP348H
are modifications of Grades TP304, TP309S, TP309Cb, 2.1 ASTM Standards: 3
TP310S, TP310Cb, TP316, TP321, TP347, and TP348, and are A 262 Practices for Detecting Susceptibility to Intergranu-
intended for high-temperature service such as for superheaters lar Attack in Austenitic Stainless Steels
and reheaters. A 480/A 480M Specification for General Requirements for
1.3 The tubing sizes and thicknesses usually furnished to Flat-Rolled Stainless and Heat-Resisting Steel Plate,
this specification are 1⁄8 in. [3.2 mm] in inside diameter to 5 in. Sheet, and Strip
[127 mm] in outside diameter and 0.015 to 0.320 in. [0.4 to 8.1 A 1016/A 1016M Specification for General Requirements
mm], inclusive, in wall thickness. Tubing having other dimen- for Ferritic Alloy Steel, Austenitic Alloy Steel, and Stain-
sions may be furnished, provided such tubes comply with all less Steel Tubes
other requirements of this specification. E 112 Test Methods for Determining Average Grain Size
1.4 Mechanical property requirements do not apply to E 213 Practice for Ultrasonic Examination of Metal Pipe
tubing smaller than 1⁄8 in. [3.2 mm] in inside diameter or 0.015 and Tubing
in. [0.4 mm] in thickness. E 273 Practice for Ultrasonic Examination of the Weld
1.5 Optional supplementary requirements are provided and, Zone of Welded Pipe and Tubing
when one or more of these are desired, each shall be so stated E 527 Practice for Numbering Metals and Alloys (UNS)
in the order. 3. Ordering Information
1.6 The values stated in either inch-pound units or SI units
are to be regarded separately as standard. Within the text, the 3.1 It is the responsibility of the purchaser to specify all
SI units are shown in brackets. The values stated in each requirements that are necessary for material ordered under this
system are not exact equivalents; therefore, each system must specification. Such requirements may include, but are not
be used independently of the other. Combining values from the limited to, the following:
two systems may result in nonconformance with the specifi- 3.1.1 Quantity (feet, metres, or number of lengths),
cation. The inch-pound units shall apply unless the “M” 3.1.2 Name of material (welded tubes),
designation of this specification is specified in the order. 3.1.3 Grade (Table 1),
1.7 The following safety hazards caveat pertains only to the 3.1.4 Size (outside diameter and nominal wall thickness),
test method described in the Supplementary Requirements of 3.1.5 Length (specific or random),
this specification. This standard does not purport to address all 3.1.6 Optional requirements (13.6),
of the safety concerns, if any, associated with its use. It is the 3.1.7 Test report required (see Certification Section of
Specification A 1016/A 1016M),
3.1.8 Specification designation, and
3.1.9 Special requirements and any supplementary require-
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel, ments selected.
Stainless Steel, and Related Alloys and is the direct responsibility of Subcommittee
A01.10 on Stainless and Alloy Steel Tubular Products.
3
Current edition approved Oct. 1, 2003. Published November 2003. Originally For referenced ASTM standards, visit the ASTM website, www.astm.org, or
approved in 1941. Last previous edition approved in 2002 as A 249/A 249M – 02. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
2
For ASME Boiler and Pressure Vessel Code applications see related Specifi- Standards volume information, refer to the standard’s Document Summary page on
cation SA-249 in Section II of that Code. 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.

1
 TABLE 1 Chemical Requirements, %A

Composition, %
Grade UNS Carbon Manganese Phosphorous Sulfur Silicon Chromium Nickel Molybdenum NitrogenC Copper Other
DesignationB
TP 201 S20100 0.15 5.50–7.5 0.060 0.030 1.00 16.0–18.0 3.5–5.5 ... 0.25 ... ...
TP 202 S20200 0.15 7.5–10.0 0.060 0.030 1.00 17.0–19.0 4.0–6.0 ... 0.25 ... ...
TPXM-19 S20910 0.06 4.0–6.0 0.045 0.030 1.00 20.5–23.5 11.5–13.5 1.50–3.00 0.20–0.40 ... Cb 0.10–0.30
V 0.10–0.30
TPXM-29 S24000 0.08 11.5–14.5 0.060 0.030 1.00 17.0–19.0 2.3–3.7 ... 0.20–0.40 ... ...
TP304 S30400 0.08 2.00 0.045 0.030 1.00 18.0–20.0 8.0–11.0 ... ... ... ...

2
TP304LD S30403 0.030 2.00 0.045 0.030 1.00 18.0–20.0 8.0–12.0 ... ... ... ...
TP304H S30409 0.04–0.10 2.00 0.045 0.030 1.00 18.0–20.0 8.0–11.0 ... ... ... ...
... S30415 0.04–0.06 0.80 0.045 0.030 1.00–2.00 18.0–19.0 9.0–10. ... 0.12–0.18 ... Ce
0.03–0.08
TP304N S30451 0.08 2.00 0.045 0.030 1.00 18.0–20.0 8.0–11.0 ... 0.10–0.16 ... ...
TP304LND S30453 0.030 2.00 0.045 0.030 1.00 18.0 20.0 8.0–11.0 0.10–0.16 ... ...
TP305 S30500 0.12 2.00 0.045 0.030 1.00 17.0–19.0 11.0–13.0 ... ... ... ...
A 249/A 249M – 03

... S30615 0.16–0.24 2.00 0.030 0.030 3.2–4.0 17.0–19.5 13.5–16.0 ... ... ... ...
... S30815 0.05–0.10 0.80 0.040 0.030 1.40–2.00 20.0–22.0 10.0–12.0 ... 0.14–0.20 ... Ce
0.03–0.08
TP309S S30908 0.08 2.00 0.045 0.030 1.00 22.0–24.0 12.0–15.0 ... ... ... ...
TP309H S30909 0.04–0.10 2.00 0.045 0.030 1.00 22.0–24.0 12.0–15.0 ... ... ... ...
Contact ASTM International (www.astm.org) for the latest information.
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
 TABLE 1 Continued
Composition, %
Grade UNS Carbon Manganese Phosphorous Sulfur Silicon Chromium Nickel Molybdenum NitrogenC Copper Other
DesignationB
TP309Cb S30940 0.08 2.00 0.045 0.030 1.00 22.0–24.0 12.0–16.0 ... ... ... Cb 10x
C-1.10
TP309HCb S30941 0.04–0.10 2.00 0.045 0.030 1.00 22.0–24.0 12.0–16.0 ... ... ... Cb 10x
C-1.10
TP310S S31008 0.08 2.00 0.045 0.030 1.00 24.0–26.0 19.0–22.0 ... ... ... ...
TP310H S31009 0.04–0.10 2.00 0.045 0.030 1.00 24.0–26.0 19.0–22.0 ... ... ... ...
TP310Cb S31040 0.08 2.00 0.045 0.030 1.00 14.0–26.0 18.0–22.0 ... ... ... Cb 10x

3
C-1.10
TP310HCb S31041 0.04–0.10 2.00 0.045 0.030 1.00 24.0–26.0 19.0–22.0 ... ... ... Cb 10x
C-1.10
... S31050 0.030 2.00 0.030 0.015 0.40 24.0–26.0 21.0–23.0 2.00–3.00 0.10–0.16 ... ...
... S31254 0.020 1.00 0.030 0.010 0.80 19.5–20.5 17.5–18.5 6.0–6.5 0.18–0.25 0.50–1.00 ...
TP316 S31600 0.08 2.00 0.045 0.030 1.00 16.0–18.0 10.0–14.0 2.00–3.00 ... ... ...
TP316LD S31603 0.030 2.00 0.045 0.030 1.00 16.0–18.0 10.0–14.0 2.00–3.00 ... ... ...
A 249/A 249M – 03

TP316H S31609 0.04–0.10 2.00 0.045 0.030 1.00 16.0–18.0 10.0–14.0 2.00–3.00 ... ... ...
TP316N S31651 0.08 2.00 0.045 0.030 1.00 16.0–18.0 10.0–13.0 2.00–3.00 0.10–0.16 ... ...
TP316LND S31653 0.030 2.00 0.045 0.030 1.00 16.0–18.0 10.0–13.0 2.00–3.00 0.10–0.16 ... ...
TP317 S31700 0.08 2.00 0.045 0.030 1.00 18.0–20.0 11.0–15.0 3.0–4.0 ... ... ...
TP317L S31703 0.030 2.00 0.045 0.030 1.00 18.0–20.0 11.0–15.0 3.0–4.0 ... ... ...
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NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
 TABLE 1 Continued
Composition, %
Grade UNS Carbon Manganese Phosphorous Sulfur Silicon Chromium Nickel Molybdenum NitrogenC Copper Other
DesignationB
... S31725 0.030 2.00 0.045 0.030 1.00 18.0–20.0 13.5–17.5 4.0–5.0 0.20 ... ...
... S31726 0.030 2.00 0.045 0.030 1.00 17.0–20.0 14.5–17.5 4.0–5.0 0.10–0.20 ... ...
... S32050 0.030 1.50 0.035 0.020 1.00 22.0–24.0 20.0–23.0 6.0–6.8 0.21–0.32 0.40 ...
TP321 S32100 0.08 2.00 0.045 0.030 1.00 17.0–19.0 9.0–12.0 ... 0.10 ... Ti 5(C+N)-
0.70
TP321H S32109 0.04–0.10 2.00 0.045 0.030 1.00 17.0–19.0 9.0–12.0 ... 0.10 ... Ti 5(C+N)-
0.70
... S32654 0.020 2.0–4.0 0.030 0.005 0.50 24.0–25.0 21.0–23.0 7.0–8.0 0.45–0.55 0.30–0.60 ...
... S33228 0.04–0.08 1.00 0.020 0.015 0.30 26.0–28.0 31.0–333.0 ... ... ... Cb
0.60–1.00
Ce
0.05–0.10
Al0.025
... S34565 0.030 5.0–7.0 0.030 0.010 1.00 23.0–25.0 16.0–18.0 4.0–5.0 0.40–0.60 ... Cb 0.10
TP347 S34700 0.08 2.00 0.045 0.030 1.00 17.0–19.0 9.0–12.0 ... ... ... Cb 10xC-

4
1.10
TP347H S34709 0.04–0.10 2.00 0.045 0.030 1.00 17.0–19.0 9.0–12.0 ... ... ... Cb 8xC-
1.10
TP348 S34800 0.08 2.00 0.045 0.030 1.00 17.0–19.0 9.0–12.0 ... ... ... (Cb+Ta)
10xC-1.10
Ta 0.10
Co 0.20
A 249/A 249M – 03

TP348H S34809 0.04–0.10 2.00 0.045 0.030 1.00 17.0–19.0 9.0–12.0 ... ... ... (Cb+Ta)
8xC-1.10
Ta 0.10
Co 0.20
TPXM-15 S38100 0.08 2.00 0.030 0.030 1.50–2.50 17.0–19.0 17.5–18.5 ... ... ... ...
... N08367 0.030 2.00 0.040 0.030 1.00 20.0–22.0 23.5–25.5 6.0–7.0 0.18–0.25 0.75 ...
... N08926 0.020 2.00 0.030 0.010 0.50 19.0–21.0 24.0–26.0 6.0–7.0 0.15–0.25 0.50–1.50 ...
... N08904 0.020 2.00 0.040 0.030 1.00 19.0–23.0 23.0–28.0 4.0–5.0 0.10 1.00–2.00 ...
A
Maximum, unless otherwise indicated.
B
New designation established in accordance with Practice E 527 and SAE J1086, Practice for Numbering Metals and Alloys (UNS).
Contact ASTM International (www.astm.org) for the latest information.

C
The method of analysis for nitrogen shall be a matter of agreement between the purchaser and manufacturer.
D
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 and TP 316L. Small outside diameter tubes are defined as those
less than 0.500 in. [12.7 mm] in outside diameter and light wall are those less than 0.049 in. [1.2 mm] in minimum wall thickness.
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
 NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
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A 249/A 249M – 03
4. General Requirements 8. Product Analysis
4.1 Material furnished under this specification shall con- 8.1 An analysis of either one length of flat-rolled stock or
form to the applicable requirements of the current edition of one tube shall be made for each heat. The chemical composi-
Specification A 1016/A 1016M, unless otherwise provided tion thus determined shall conform to the requirements given in
herein. Section 7.
8.2 A product analysis tolerance of Table A1.1 in Specifi-
5. Manufacture cation A 480/A 480M shall apply. The product analysis toler-
5.1 The tubes shall be made from flat-rolled steel by an ance is not applicable to the carbon content for material with a
automatic welding process with no addition of filler metal. specified maximum carbon of 0.04 % or less.
5.2 Subsequent to welding and prior to final heat treatment, 8.3 If the original test for product analysis fails, retests of
the tubes shall be cold worked either in both weld and base two additional lengths of flat-rolled stock or tubes shall be
metal or in weld metal only. The method of cold working may made. Both retests for the elements in question shall meet the
be specified by the purchaser. When cold drawn, the purchaser requirements of the specification; otherwise all remaining
may specify the minimum amount of reduction in cross- material in the heat or lot (Note 1) shall be rejected or, at the
sectional area or wall thickness, or both. option of the producer, each length of flat-rolled stock or tube
may be individually tested for acceptance. Lengths of flat-
6. Heat Treatment rolled stock or tubes that do not meet the requirements of the
6.1 All material shall be furnished in the heat-treated specification shall be rejected.
condition in accordance with the requirements of Table 2.
NOTE 1—For flattening and flange requirements, the term lot applies to
6.2 A solution annealing temperature above 1950°F
all tubes prior to cutting of the same nominal size and wall thickness
[1065°C] may impair the resistance to intergranular corrosion which are produced from the same heat of steel. When final heat treatment
after subsequent exposure to sensitizing conditions in is in a batch-type furnace, a lot shall include only those tubes of the same
TP309HCb, TP310HCb, TP321, TP321H, TP347, TP347H, size and from the same heat which are heat treated in the same furnace
TP348, and TP348H. When specified by the purchaser, a lower charge. When the final heat treatment is in a continuous furnace, the
temperature stabilization or re-solution anneal shall be used number of tubes of the same size and from the same heat in a lot shall be
subsequent to the initial high temperature solution anneal (see determined from the size of the tubes as prescribed in Table 3.
Supplementary Requirement S4). NOTE 2—For tension and hardness test requirements, the term lot
applies to all tubes prior to cutting, of the same nominal diameter and wall
7. Chemical Composition thickness which 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
7.1 The heat analysis shall conform to the requirements as the same size and the same heat which are heat treated in the same furnace
to chemical composition given in Table 1. charge. When the final heat treatment is in a continuous furnace, a lot shall

TABLE 2 Heat Treatment Requirements

Grade UNS Number Solutioning Temperature, min or range Quenching Method
A
All grades not 1900°F [1040°C]
individually listed
below
B
... S30815 1920°F [1050°C]
TP309HCb S30941 1900°F [1040°C]C B
B
TP310H S31009 1900°F [1040°C]
TP310HCb S31041 1900°F [1040°C]C B
B
S31254 2100°F [1150°C]
B
TP316H S31609 1900°F [1040°C]
TP321 S32100 1900°F [1040°C]C B

TP321H S32109 2000°F [1100°C]C B

B
S32654 2100°F [1150°C]
B
... S33228 2050°F [1120°C]
B
... S34565 2050°F [1120°C]–
B
2140°F [1170°C]
TP347 S34700 1900°F [1040°C]C B

TP347H S34709 2000°F [1100°C]C B

TP348 S34800 1900°F [1040°C]C B

TP348H S34809 2000°F [1100°C]C B

B
N08367 2025°F [1110°C]
B
N08904 2000°F [1100°C]
B
N08926 2010°F [1105°C]
A
Quenched in water or rapidly cooled by other methods, at a rate sufficient to prevent reprecipitation of carbides, as demonstrated by the capability of passing Practices
A 262, Practice E. The manufacturer is not required to run the test unless it is specified on the purchase order (See Supplementary Requirement S6). Note that Practices
A 262 requires the test to be performed on sensitized specimens in the low carbon and stabilized types and on specimens representative of the as-shipped condition of
the other types. In the case of low-carbon types containing 3 % or more molybdenum, the applicability of the sensitizing treatment prior to testing shall be a matter for
negotiation between the seller and purchaser.
B
Quenched in water or rapidly cooled by other methods.
C
A solution treating temperature above 1950°F [1065°C] may impair resistance to intergranular corrosion after subsequent exposure to sensitizing conditions in the
indicated grades. When specified by the purchaser, a lower temperature stabilization or re-solution anneal shall be used subsequent to the higher-temperature solution
anneal prescribed in this table (See Supplementary Requirement S4).

5
 NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
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A 249/A 249M – 03
TABLE 3 Number of Tubes in a Lot Heat Treated by the TABLE 4 Tensile and Hardness RequirementsA
Continuous Process Grade UNS Tensile Yield Elongation Rockwell
Size of Tube Size of Lot Designation Strength, Strength, in 2 in. or Hardness
min, ksi min, ksi 50 mm, Number,
2 in. [50.8 mm] and over in outside not more than 50 tubes [MPa] [MPa] min, % max
diameter and 0.200 in. [5.1 mm] and over
in wall thickness TP201 S20100 95 [655] 38 [260] 35 B95
Less than 2 in. [50.8 mm] but over 1 in. not more than 75 tubes TP202 S20200 90 [620] 38 [260] 35 B95
[25.4 mm] in outside diameter or over 1 in. TPXM-19 S20910 100 [690] 55 [380] 35 C25
[25.4 mm] in outside diameter and under TPXM-29 S24000 100 [690] 55 [380] 35 B100
0.200 in. [5.1 mm] in wall thickness ... S24565 115 [795] 60 [415] 35 B100
1 in. [25.4 mm] or less in outside diameter not more than 125 TP304 S30400 75 [515] 30 [205] 35 B90
tubes TP304L S30403 70 [485] 25 [170] 35 B90
TP304H S30409 75 [515] 30 [205] 35 B90
... S30415 87 [600] 42 [290] 35 B96
TP304N S30451 80 [550] 35 [240] 35 B90
include all tubes of the same size and heat, annealed in the same furnace TP304LN S30453 75 [515] 30 [205] 35 B90
TP305 S30500 75 [515] 30 [205] 35 B90
at the same temperature, time at heat, and furnace speed.
... S30615 90 [620] 40 [275] 35 B95
... S30815 87 [600] 45 [310] 35 B95
9. Tensile Requirements TP309S S30908 75 [515] 30 [205] 35 B90
9.1 The material shall conform to the tensile properties TP309H S30909 75 [515] 30 [205] 35 B90
TP309Cb S30940 75 [515] 30 [205] 35 B90
prescribed in Table 4. TP309HCb S30941 75 [515] 30 [205] 35 B90
TP310S S31008 75 [515] 30 [205] 35 B90
10. Hardness Requirements TP310H S31009 75 [515] 30 [205] 35 B90
TP310Cb S31040 75 [515] 30 [205] 35 B90
10.1 The tubes shall have a Rockwell hardness number not TP310HCb S31041 75 [515] 30 [205] 35 B90
exceeding the values specified in Table 4. ... S31050:
t # 0.25 in. 84 [580] 39 [270] 25 B95
t > 0.25 in. 78 [540] 37 [255] 25 B95
11. Reverse-Bend Test Requirement ... S31254:
11.1 A section 4 in. [100 mm] minimum in length shall be t # 0.187 in. 98 [675] 45 [310] 35 B100
[5.00 mm]
split longitudinally 90° on each side of the weld. The sample t > 0.187 in. 95 [655] 45 [300] 35 B100
shall then be opened and bent around a mandrel with a [5.00 mm]
maximum thickness of four times the wall thickness, with the TP316 S31600 75 [515] 30 [205] 35 B90
TP316L S31603 70 [485] 25 [170] 35 B90
mandrel parallel to the weld and against the original outside TP316H S31609 75 [515] 30 [205] 35 B90
surface of the tube. The weld shall be at the point of maximum TP316N S31651 80 [550] 35 [240] 35 B90
bend. There shall be no evidence of cracks, or of overlaps TP316LN S31653 75 [515] 30 [205] 35 B90
TP317 S31700 75 [515] 30 [205] 35 B90
resulting from the reduction in thickness of the weld areas by TP317L S31703 75 [515] 30 [205] 35 B90
cold working. When the geometry or size of the tubing make it ... S31725 75 [515] 30 [205] 35 B90
difficult to test the sample as a single piece, the sample may be ... S31726 80 [550] 35 [240] 35 B90
... S32050 98 [675] 48 [330] 40
sectioned into smaller pieces provided a minimum of 4 in. of TP321 S32100 75 [515] 30 [205] 35 B90
weld is subjected to reverse bending. TP321H S32109 75 [515] 30 [205] 35 B90
... S32654 109 [750] 62 [430] 35 B100
NOTE 3—The reverse bend test is not applicable when the specified ... S33228 73 [500] 27 [185] 30 B90
wall is 10 % or more of the specified outside diameter, or the wall TP347 S34700 75 [515] 30 [205] 35 B90
thickness is 0.134 in. [3.4 mm] or greater, or the outside diameter size is TP347H S34709 75 [515] 30 [205] 35 B90
TP348 S34800 75 [515] 30 [205] 35 B90
less than 0.375 in. [9.5 mm]. Under these conditions the reverse flattening
TP348H S34809 75 [515] 30 [205] 35 B90
test of Specification A 1016/A 1016M shall apply. TPXM-15 S38100 75 [515] 30 [205] 35 B90
... N08367
12. Grain Size Requirement t # 0.187 100 [690] 45 [310] 30 100
t > 0.187 95 [655] 45 [310] 30 100
12.1 The grain size of Grades TP309H, TP309HCb, ... N08904 71 [490] 31 [215] 35 B90
TP310H and TP310HCb, as determined in accordance with ... N08926 94 [650] 43 [295] 35 B100
Test Methods E 112, shall be No. 6 or coarser. A
Not applicable to tubes less than 1⁄8 in. [3.2 mm] in outside diameter or having
12.2 The grain size of Grades TP304H, TP316H, TP321H, wall thickness below 0.015 in. [0.4 mm], or both. The tensile properties of such
small diameter or thin wall tubes shall be a matter of agreement between the
TP347H and TP348H, as determined in accordance with Test manufacturer and the purchaser.
Methods E 112, shall be No. 7 or coarser.

13. Mechanical Tests and Grain Size Determinations 13.3 Flange Test—One flange test shall be made on speci-
Required mens from each end of one finished tube, not the one used for
13.1 Tension Test—One tension test shall be made on a the flattening test, from each lot (Note 1).
specimen for lots of not more than 50 tubes. Tension tests shall 13.4 Reverse-Bend Test—One reverse-bend test shall be
be made on specimens from two tubes for lots of more than 50 made on a specimen from each 1500 ft [450 m] of finished
tubes (Note 2). tubing.
13.2 Flattening Test—One flattening test shall be made on 13.5 Hardness Test—Brinell or Rockwell hardness tests
specimens from each end of one finished tube, not the one used shall be made on specimens from two tubes from each lot
for the flange test, from each lot (Note 1). (Note 2).

6
 NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
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A 249/A 249M – 03
13.6 Hydrostatic or Nondestructive Electric Test—Each 15. Workmanship, Finish, and Appearance
tube shall be subjected to either the hydrostatic or the nonde- 15.1 Finished tubes shall have smooth ends free of burrs and
structive electric test. The purchaser may specify which test is shall not deviate from straightness by more than 0.030 in. [0.8
to be used. mm] in 3 ft (900 mm] of length.
13.7 Grain Size—Grain size determinations on grades
16. Surface Condition
TP309H, TP309HCb, TP310H and TP310HCb shall be made
on the same number of tubes as prescribed for the flattening 16.1 The tubes, after final heat treatment, shall be chemi-
test. cally descaled or pickled free of scale. When bright annealing
is used, pickling or chemical descaling is not necessary.
14. Permissible Variations in Dimensions 17. Forming Operations
14.1 Dimensional tolerances other than wall thickness tol- 17.1 Tubes when inserted in the boiler shall stand expanding
erances shall be in accordance with Specification A 1016/ and beading without showing cracks or flaws. All tubes, when
A 1016M. Wall thickness tolerances shall be 610 % of nomi- properly manipulated, shall be able to stand expanding and
nal wall for all tubing sizes. beading without showing cracks and flaws, and also shall stand
14.2 The wall thickness of the weld shall not exceed the all forging, welding, and bending operations necessary for
wall thickness measured 90° from the weld by more than 6 % application without developing defects.
of the specified wall thickness or 0.004 in. [0.1 mm], which- 18. Product Marking
ever is greater. 18.1 In addition to the marking prescribed in Specification
14.2.1 Requirements of 14.2 are not applicable when any of A 1016/A 1016M, the marking for Grades TP304H, TP309H,
the following apply: TP309HCb, TP310H, TP310HCb, TP316H, TP321H, TP347H,
14.2.1.1 When the specified wall thickness exceeds 12 % of and TP348H shall also include the heat number and the
the specified diameter; heat-treatment lot identification.
14.2.1.2 When the specified wall thickness exceeds 0.165 19. Keywords
in. [4.2 mm]; 19.1 austenitic stainless steel; boiler tubes; condenser tube;
14.2.1.3 When the specified OD exceeds 3 in. [76.2 mm]; or heat exchanger tube; high temperature applications; steel tube;
14.2.1.4 When the specified minimum yield strength given superheater tubes; temperature service applications, high;
in Table 3 for the specified grade is 35 ksi [240 MPa] or greater. welded steel tube

SUPPLEMENTARY REQUIREMENTS

The following supplementary requirements shall apply only when specified by the purchaser in the
inquiry, contract, or order.

S1. Stress-Relieved Annealed Tubes S3. Air Underwater Pressure Test

S1.1 For use in certain corrosives, particularly chlorides S3.1 When specified, the tubing shall be examined by the air
where stress corrosion may occur, tubes in Grades TP304L, underwater pressure test.
TP316L, TP321, TP347, and TP348 may be specified in the
stress-relieved annealed condition. Details of these supplemen- S4. Stabilizing Heat Treatment
tal requirements shall be agreed upon by the manufacturer and
S4.1 Subsequent to the solution anneal required in Section
the purchaser.
6, Grades TP309HCb, TP310HCb, TP321, TP321H, TP347,
S1.2 When stress-relieved tubes are specified, tubes shall be
TP347H, TP348, and TP348H shall be given a stabilization
given a heat treatment at 1550 to 1650°F [845 to 900°C] after
heat treatment at a temperature lower than that used for the
roll straightening. Cooling from this temperature range may be
initial solution annealing heat treatment. The temperature of
either in air or by slow cooling. No mechanical straightening is
stabilization heat treatment shall be at a temperature as agreed
permitted after the stress-relief treatment.
upon between the purchaser and vendor.
S1.3 Straightness of the tubes shall be a matter of negotiation
between the purchaser and manufacturer.
S5. Unstraightened Tubes
S2. Minimum Wall Tubes S5.1 When the purchaser specifies tubes unstraightened
S2.1 When specified by the purchaser, tubes shall be fur- after final heat treatment (such as coils), the straightness
nished on a minimum wall basis. Such tubes shall satisfy the requirement of Section 12 shall not apply and the minimum
minimum wall thickness requirements of Specification A 1016/ yield strength of Table 3 shall be reduced by 5 ksi [35 MPa].
A 1016M rather than the nominal wall requirements of this S5.2 On the certification, and wherever the grade designa-
specification. In addition to the marking required by Section tion for unstraightened tubing appears, it shall be identified
18, the tubing shall be marked S2. with the suffix letter “U” (for example, 304-U, 321-U, etc.).

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 NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.

A 249/A 249M – 03
S6. Intergranular Corrosion Test S7.7 Immerse the samples into the solution. Add boiling
S6.1 When specified, material shall pass intergranular cor- chips and bring to a boil. Allow the chips to remain boiling
rosion tests conducted by the manufacturer in accordance with throughout the test. The time of testing shall be that which is
Practices A 262, Practice E. required to remove 40 to 60 % of the original base-metal
thickness (usually 2 h or less). If more than 60 % of the
NOTE S6.1—Practice E requires testing on the sensitized condition for base-metal thickness remains, the sample may be removed
low carbon or stabilized grades, and on the as-shipped condition for other
after 24 h.
grades.
S7.8 At the end of the test period, remove the samples from
S6.2 A stabilization heat treatment in accordance with the solution, rinse with distilled water, and dry.
Supplementary Requirement S4 may be necessary and is S7.9 After exposure to the test solution, repeat the tube-
permitted in order to meet this requirement for the grades thickness measurement as in S7.6. If the thinning is not
containing titanium or columbium, particularly in their H uniform across the width of the weld, then two sets of
versions. weld-metal measurement are required. One set of measure-
ments is to be taken along the centerline of the weld. The
S7. Weld Decay Test second set of measurements is to be taken in the thinnest area
S7.1 This test is not applicable to alloys with a nickel of the weld.
content $ 19.0 % or a molybdenum content $ 4.00 %, or both. S7.10 Calculate the corrosion ratio, R, for both sections of
S7.2 When specified by the purchase order, one sample the weld as follows in Eq 1:
from each lot of tubing (Note 2) shall be subjected to testing in Wo 2 W
a boiling mixture of 50 % reagent grade hydrochloric acid and R5 B 2B (1)
o
50 % water.
S7.3 Approximately 2-in. long samples shall be prepared where:
from a production length of tubing. Shorter, 1-in. samples may Wo = average weld-metal thickness before the test,
be used for small diameter (1/2-in. and below) tubing. Split the W = average weld-metal thickness after the test,
Bo = average base-metal thickness before the test, and
sample longitudinally to allow for easy micrometer measure-
B = average base-metal thickness after the test.
ments. The sample may be one piece which contains the weld
S7.10.1 A corrosion ratio of 1.25 or less for the thinnest
and at least 90° of base-metal to one side of the weld.
section of the weld is permissible. Other criteria, such as a ratio
Alternately, the sample may be two separate pieces with one
of 1.00 or less, may be specified upon agreement between the
containing the weld and a similar size section from the balance
producer and the purchaser.
of the tube opposite the weld consisting of 100 % base metal.
Remove all burrs and sharp edges by lightly grinding. Remove S8. Special Applications
dust and grease by cleaning with soap and water or other S8.1 For special applications, such as hydraulic expansion
suitable solvents. Then, place sample(s) in the flask. It is not of tubes into tube sheets, there shall be no dimensional
recommended to test more than four samples together, or to indication of the weld. Tubes ordered to this requirement shall
mix alloy types. bear the additional marking of NB.
S7.4 Prepare the hydrochloric acid solution by slowly add-
ing reagent grade (approximately 37 %) hydrochloric acid to S9. Additional Testing of Welded Tubing per ASME
an equal volume of distilled water. (Warning—Protect eyes Request
and use rubber gloves when handling acid. Mixing shall be S9.1 Each tube shall be subjected to an ultrasonic inspection
done under a hood and testing shall be run under a hood.) employing Practices E 273 or E 213 with the rejection criteria
S7.5 The test container shall be a 1-L Erlenmeyer flask referenced in Specification A 1016/A 1016M.
equipped with ground-glass joints and an Ahlin condenser. The S9.2 If Practice E 273 is employed, a 100 % volumetric
volume of the solution shall be approximately 700 mL. inspection of the entire length of each tube shall also be
S7.6 Measure the thickness of the tube at five locations performed using one of the nondestructive electric tests per-
along the weld area and at five locations along the base-metal mitted by Specification A 1016/A 1016M.
section. In both cases, take measurements at approximately S9.3 The test methods described in the supplement may not
equal longitudinal intervals along the section lengths. Make be capable of inspecting the end portions of tubes. This
these measurements with a sharp pointed micrometer accurate condition is referred to as end effect. This portion, as deter-
to at least 0.001 in. The micrometer must be suitable for mined by the manufacturer, shall be removed and discarded.
measuring the small features in the surface after testing. S9.4 In addition to the marking prescribed in Specification
Typical pin micrometers have tapered anvils with a tip radius A 1016/A 1016M, “S9” shall be added after the grade desig-
of less than 0.015 in. nation.

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 NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.

A 249/A 249M – 03
SUMMARY OF CHANGES

Committee A01 has identified the location of selected changes to this standard since the last issue
(A 249/A 249M – 02) that may impact the use of this standard.

(1) Clarified ordering requirements to include purchaser’s (3) Added 14.2 to provide additional requirements for weld
responsibility. thickness.
(2) Replaced unclear wording in 7.1 and 8.1.

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