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ASTM A250/A250M-95

(Specification)

Standard Specification for Electric-Resistance-Welded Ferritic Alloy-Steel Boiler and Superheater Tubes

Standard Specification for Electric-Resistance-Welded Ferritic Alloy-Steel Boiler and Superheater Tubes

SCOPE
1.1 This specification 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 and, when desired, shall be so stated in the order.
1.5 The values stated in either inch-pound units or SI units are to be regarded separately as the standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification. The inch-pound units shall apply unless the "M" designation of this specification is specified in the order.

General Information

Status
Historical
Publication Date
31-Dec-2000
Technical Committee
A01 - Steel, Stainless Steel and Related Alloys
Drafting Committee
A01.10 - Stainless and Alloy Steel Tubular Products
Current Stage
Ref Project

Relations

Replaced By
ASTM A250/A250M-95(2001) - Standard Specification for Electric-Resistance-Welded Ferritic Alloy-Steel Boiler and Superheater Tubes
Effective Date
01-Jan-2001

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ASTM A250/A250M-95 - Standard Specification for Electric-Resistance-Welded Ferritic Alloy-Steel Boiler and Superheater TubesASTM A250/A250M-95 - Standard Specification for Electric-Resistance-Welded Ferritic Alloy-Steel Boiler and Superheater Tubes
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ASTM A250/A250M-95 - Standard Specification for Electric-Resistance-Welded Ferritic Alloy-Steel Boiler and Superheater Tubes
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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: A 250/A 250M – 95 An American National Standard
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Specification for
Electric-Resistance-Welded Ferritic Alloy-Steel Boiler and
1
Superheater Tubes
This standard is issued under the fixed designation A 250/A 250M; 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 3. Ordering Information
2
3.1 Orders for material under this specification should
1.1 This specification covers several grades, designated T1,
include the following, as required, to describe the desired
T1a, T1b, T2, T11, T12 and T22, of minimum-wall-thickness,
material adequately:
electric-resistance-welded, carbon-molybdenum and
3.1.1 Quantity (feet, metres, or number of lengths),
chromium-molybdenum alloy-steel, boiler and superheater
3.1.2 Name of material (electric-resistance-welded tubes),
tubes.
3.1.3 Grade (Table 1),
1.2 The tubing sizes and thicknesses usually furnished to
3.1.4 Size (outside diameter or minimum wall thickness),
1
this specification are ⁄2 to 5 in. [12.7 to 127 mm] in outside
3.1.5 Length (specific or random),
diameter and 0.035 to 0.320 in. [0.9 to 8.1 mm], inclusive, in
3.1.6 Optional requirement (11.6),
minimum wall thickness. Tubing having other dimensions may
3.1.7 Test report required (see Certification Section of
be furnished, provided such tubes comply with all other
Specification A 450/A 450M),
requirements of this specification.
3.1.8 Specification designation, and
1.3 Mechanical property requirements do not apply to
3.1.9 Special requirements and any supplementary require-
1
tubing smaller than ⁄8 in. [3.2 mm] in inside diameter or 0.015
ments selected.
in. [0.4 mm] in thickness.
1.4 An optional supplementary requirement is provided and,
4. General Requirements
when desired, shall be so stated in the order.
4.1 Material furnished under this specification shall con-
1.5 The values stated in either inch-pound units or SI units
form to the applicable requirements of the current edition of
are to be regarded separately as the standard. Within the text,
Specification A 450/A 450M, unless otherwise provided
the SI units are shown in brackets. The values stated in each
herein.
system are not exact equivalents; therefore, each system must
be used independently of the other. Combining values from the 5. Manufacture
two systems may result in nonconformance with the specifi-
5.1 The steel shall be killed.
cation. The inch-pound units shall apply unless the “M”
5.2 The tubes shall be made by electric-resistance welding.
designation of this specification is specified in the order.
6. Heat Treatment
2. Referenced Documents
6.1 After welding, or when cold finished, after the final
cold-drawing pass, all tubes shall be heat treated and, except as
2.1 ASTM Standards:
provided in 6.1.1, furnished in the full annealed, isothermal
A 450/A 450M Specification for General Requirements for
3
annealed, normalized, or normalized and tempered condition at
Carbon, Ferritic Alloy, and Austenitic Alloy Steel Tubes
the option of the manufacturer. If furnished in the normalized
E 213 Practice for Ultrasonic Examination of Metal Pipe
4
and tempered condition, the minimum tempering temperature
and Tubing
shall be 1200°F [650°C], except T22 shall be tempered at
E 273 Practice for Ultrasonic Examination of Longitudinal
4
1250°F [676°C] minimum.
Welded Pipe and Tubing
6.1.1 When grades T1, T1a, T1b, and T2 are cold finished,
the tubes may, at the option of the manufacturer, be heat treated
1
This specification is under the jurisdiction of ASTM Committee A-1 on Steel,
after the final cold-drawing pass at a temperature of 1200°F or
Stainless Steel, and Related Alloys, and is the direct responsibility of Subcommittee
higher, provided one of the heat treatments specified in 6.1 was
A01.10 on Tubing.
applied after welding.
Current edition approved Sept. 10, 1995. Published December 1995. Originally
published as A 250 – 41 T. Last previous edition A 250/A 250M – 91.
2
For ASME Boiler and Pressure Vessel Code applications see related Specifi-
7. Chemical Composition
cation SA-250 in Section II of that Code.
3
7.1 The steel shall conform to the requirements as to
Annual Book of ASTM Standards, Vol 01.01.
4
Annual Book of ASTM Standards, Vol 03.03. chemical composition prescribed in Table 1.
1

---------------------- Page: 1 ----------------------
A 250/A 250M
TABLE 1 Chemical Requirements
Element Composition, %
Grade Grade Grade Grade Grade Grade Grade
T1 T1a T1b T2 T11 T12 T22
Carbon
...

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This specification covers UNS N06002, UNS N06030, UNS N06035, UNS N06022, UNS N06200, UNS N06230, UNS N06600, UNS N06617, UNS N06625, UNS N08020, UNS N08026, UNS N08024, UNS N08120, UNS N08926, UNS N08367, UNS N10242, UNS N10276, UNS N10665, UNS N10675, UNS N12160, UNS R20033, UNS N06059, UNS N06686, UNS N10629, UNS N08031, UNS N06045, UNS N06025, and UNS R30556 nickel alloy billets and bars for reforging. The products shall be hot worked from ingots by rolling, forging, extruding, hammering, or pressing. The material shall conform to the chemical composition requirements prescribed by the reference material. The chemical composition of the material shall be determined by chemical analysis in accordance with test method E1473.
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1.1 This specification covers UNS N06002, UNS N06030, UNS N06035, UNS N06022, UNS N06200, UNS N10362, UNS N06230, UNS N06600, UNS N06617, UNS N06625, UNS N08020, UNS N08026, UNS N08024, UNS N08120, UNS N08926, UNS N08367, UNS N10242, UNS N10276, UNS N10665, UNS N10675, UNS N12160, UNS R20033, UNS N06059, UNS N06686, UNS N10629, UNS N08031, UNS N06045, UNS N06025, UNS N06699, and UNS R305562 billets and bars for reforging.  
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