ASTM A250/A250M-05(2014)
(Specification)Standard Specification for Electric-Resistance-Welded Ferritic Alloy-Steel Boiler and Superheater Tubes (Withdrawn 2017)
Standard Specification for Electric-Resistance-Welded Ferritic Alloy-Steel Boiler and Superheater Tubes (Withdrawn 2017)
ABSTRACT
This guide covers standard specification for several grades, designated T1, T1a, T1b, T2, T11, T12, and T22, of minimum-wall-thickness, electric-resistance-welded, carbon-molybdenum and chromium-molybdenum alloy-steel, boiler and superheater tubes. Product analysis shall be done wherein the material shall conform to the required chemical composition for carbon, manganese, phosphorus, sulfur, silicon, molybdenum, and chromium. The material shall conform to the required tensile properties, namely: tensile strength, yield strength, and elongation. The computed minimum elongation values for steel with decreasing wall thickness shall be given. The tubes shall have a hardness not exceeding the specified values for Brinell hardness and Rockwell hardness numbers. When the final heat treatment is in a continuous furnace, the number of tubes of the same size and from the same heat in a lot shall be determined from the given size of the tubes. Required mechanical tests such as tensile test, flattening test, flange test, reverse flattening test, hardness test, and hydrostatic or nondestructive electric tests, shall be performed on the steel specimen.
SCOPE
1.1 This specification2 covers several grades, designated T1, T1a, T1b, T2, T11, T12 and T22, of minimum-wall-thickness, electric-resistance-welded, carbon-molybdenum and chromium-molybdenum alloy-steel, boiler and superheater tubes.
1.2 The tubing sizes and thicknesses usually furnished to this specification are 1/2 to 5 in. [12.7 to 127 mm] in outside diameter and 0.035 to 0.320 in. [0.9 to 8.1 mm], inclusive, in minimum wall thickness. Tubing having other dimensions may be furnished, provided such tubes comply with all other requirements of this specification.
1.3 Mechanical property requirements do not apply to tubing smaller than 1/8 in. [3.2 mm] in inside diameter or 0.015 in. [0.4 mm] in thickness.
1.4 An optional supplementary requirement is provided for non-destructive examination for certain ASME applications.
1.5 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.
1.5.1 Within the text, the SI units are shown in brackets.
1.5.2 The inch-pound units shall apply unless the “M” designation of this specification is specified in the order.
WITHDRAWN RATIONALE
This specification covered several grades, designated T1, T1a, T1b, T2, T11, T12 and T22, of minimum-wall-thickness, electric-resistance-welded, carbon-molybdenum and chromium-molybdenum alloy-steel, boiler and superheater tubes.
Formerly under the jurisdiction of Committee A01 on Steel, Stainless Steel and Related Alloys, this specification was withdrawn in November 2017. This standard is being withdrawn without replacement due to its limited use by industry.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:A250/A250M −05 (Reapproved 2014)
Standard Specification for
Electric-Resistance-Welded Ferritic Alloy-Steel Boiler and
Superheater Tubes
This standard is issued under the fixed designationA250/A250M; 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 A1016/A1016M Specification for General Requirements for
2 Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless
1.1 Thisspecification coversseveralgrades,designatedT1,
Steel Tubes
T1a, T1b, T2, T11, T12 and T22, of minimum-wall-thickness,
E213 Practice for Ultrasonic Testing of Metal Pipe and
electric-resistance-welded, carbon-molybdenum and
Tubing
chromium-molybdenum alloy-steel, boiler and superheater
E273 Practice for Ultrasonic Testing of the Weld Zone of
tubes.
Welded Pipe and Tubing
1.2 The tubing sizes and thicknesses usually furnished to
this specification are ⁄2 to 5 in. [12.7 to 127 mm] in outside
3. Ordering Information
diameter and 0.035 to 0.320 in. [0.9 to 8.1 mm], inclusive, in
3.1 Orders for material under this specification should
minimum wall thickness.Tubing having other dimensions may
include the following, as required, to describe the desired
be furnished, provided such tubes comply with all other
material adequately:
requirements of this specification.
3.1.1 Quantity (feet, metres, or number of lengths),
1.3 Mechanical property requirements do not apply to 3.1.2 Name of material (electric-resistance-welded tubes),
tubing smaller than ⁄8 in. [3.2 mm] in inside diameter or 0.015
3.1.3 Grade (Table 1),
in. [0.4 mm] in thickness. 3.1.4 Size (outside diameter or minimum wall thickness),
3.1.5 Length (specific or random),
1.4 An optional supplementary requirement is provided for
3.1.6 Optional requirement (7.3.6),
non-destructive examination for certain ASME applications.
3.1.7 Test report required (see Certification Section of
1.5 The values stated in either SI units or inch-pound units
Specification A1016/A1016M),
are to be regarded separately as standard. The values stated in
3.1.8 Specification designation, and
each system may not be exact equivalents; therefore, each
3.1.9 Special requirements and any supplementary require-
system shall be used independently of the other. Combining
ments selected.
values from the two systems may result in non-conformance
with the standard.
4. General Requirements
1.5.1 Within the text, the SI units are shown in brackets.
4.1 Product furnished under this specification shall conform
1.5.2 The inch-pound units shall apply unless the “M”
to the applicable requirements of Specification A1016/
designation of this specification is specified in the order.
A1016M, including any supplementary requirements that are
indicated in the purchase order. Failure to comply with the
2. Referenced Documents
general requirements of Specification A1016/A1016M consti-
2.1 ASTM Standards:
tutes nonconformance with this specification. In case of con-
flicts with the requirements of this specification and Specifi-
cation A1016/A1016M, this specification shall prevail.
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
5. Materials and Manufacture
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
A01.10 on Stainless and Alloy Steel Tubular Products.
5.1 The steel shall be killed.
Current edition approved Oct. 1, 2014. Published October 2014. Originally
approved in 1941. Last previous edition approved in 2009 as A250/A250M – 05
5.2 The tubes shall be made by electric-resistance welding.
(2009). DOI: 10.1520/A0250_A0250M-05R14.
5.3 Heat Treatment
For ASME Boiler and Pressure Vessel Code applications see related Specifi-
cation SA-250 in Section II of that Code.
5.3.1 After welding, or when cold finished, after the final
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
cold-drawing pass, all tubes shall be heat treated and, except as
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
provided in 5.3.2, furnished in the full annealed, isothermal
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. annealed, normalized, or normalized and tempered condition at
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
A250/A250M−05 (2014)
TABLE 1 Chemical Requirements
Element Composition, %
Grade Grade Grade Grade Grade Grade Grade
T1 T1a T1b T2 T11 T12 T22
Carbon 0.10–0.20 0.15–0.25 0.14 max 0.10–0.20 0.05–0.15 0.05–0.15 0.15 max
Manganese 0.30–0.80 0.30–0.80 0.30–0.80 0.30–0.61 0.30–0.60 0.30–0.61 0.30–0.60
Phosphorus, max 0.025 0.025 0.025 0.025 0.025 0.030 0.025
Sulfur, max 0.025 0.025 0.025 0.020 0.020 0.020 0.020
Silicon 0.10–0.50 0.10–0.50 0.10–0.50 0.10–0.30 0.50–1.00 0.50 max 0.50 max
Molybdenum 0.44–0.65 0.44–0.65 0.44–0.65 0.44–0.65 0.44–0.65 0.44–0.65 0.87–1.13
Chromium . . . . . . . . . 0.50–0.81 1.00–1.50 0.80–1.25 1.90–2.60
E 5 48t115.00 E 5 1.87t115.00
the option of the manufacturer. If furnished in the normalized @ #
and tempered condition, the minimum tempering temperature
where:
shall be 1200 °F [650 °C], except T22 shall be tempered at
E = elongation in 2 in. [50 mm] %, and
1250 °F [676 °C] minimum.
t = actual thickness of specimen, in. [mm].
5.3.2 When grades T1, T1a, T1b, and T2 are cold finished,
7.2 Hardness Requirements—The tubes shall have a hard-
thetubesmay,attheoptionofthemanufacturer,beheattreated
after the final cold-drawing pass at a temperature of 1200 °F or ness not exceeding the values given in Table 4.
higher, provided one of the heat treatments specified in 5.3.1
7.3 Mechanical Tests Required
was applied after welding.
7.3.1 Tension Test—One tension test shall be made on a
specimen for lots of not more than 50 tubes. Tension tests shall
6. Chemical Composition
be made on specimens from two tubes for lots of more than 50
6.1 The steel shall conform to the requirements given in
tubes (See 8.2).
Table 1.
7.3.2 Flattening Test—One flattening test shall be made on
specimens from each end of one finished tube, not the one used
6.2 Product Analysis
for the flange test, from each lot (See 8.1).
6.2.1 An analysis of either one length of flat-rolled stock or
7.3.3 Flange Test—One flange test shall be made on speci-
onetubeshallbemadeoneachheat.Thechemicalcomposition
mens from each end of one finished tube, not the one used for
thus determined shall conform to the requirements given in
the flattening test, from each lot (See 8.1).
Table 1.
7.3.4 Reverse Flattening Test—One reverse flattening test
6.2.2 If the original test for product analysis fails, retests of
shall be made on a specimen from each 1500 ft [450 m] of
two additional lengths of flat-rolled stock or tubes shall be
finished tubing.
made. Both retests for the elements in question shall meet the
7.3.5 Hardness Test—Brinell and Rockwell hardness tests
requirements of the specification; otherwise all remaining
shall be made on specimens from two tubes from each lot (See
materi
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