ASTM B668-00
(Specification)Standard Specification for UNS N08028 Seamless Pipe and Tube
Standard Specification for UNS N08028 Seamless Pipe and Tube
SCOPE
1.1 This specification covers UNS N08028 seamless cold-finished tubes intended for general corrosive service. The general requirements are covered in Specification B829.
1.2 This specification covers tubes 5/8 to 5 in. (15.9 to 127 mm), inclusive, in wall thickness. Note 1-Tubing having other dimensions may be furnished upon agreement between the manufacturer and the purchaser, provided such tubes comply with all other requirements of this specification.
1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
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Designation: B 668 – 00
Standard Specification for
UNS N08028 Seamless Pipe and Tube
This standard is issued under the fixed designation B 668; 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 5. Materials and Manufacture
1.1 This specification covers UNS N08028 seamless cold- 5.1 Pipeandtubeshallbefurnishedinthesolution-annealed
finished or hot finished pipe and tube intended for general condition.
corrosive service. The general requirements are covered in
NOTE 1—The recommended heat treatment shall consist of heating the
Specification B 829.
material to a temperature of 1975 to 2100°F (1080 to 1150°C) with
1.2 The values stated in inch-pound units are to be regarded
subsequent quenching in water or rapidly cooling by other means.
as the standard. The values given in parentheses are for
5.2 The scale shall be removed by suitable means. When
information only.
bright annealed, scale removal operations are not necessary.
2. Referenced Documents
6. Chemical Composition
2.1 ASTM Standards:
6.1 The material shall conform to the requirement pre-
B 829 Specification for General Requirements for Nickel
scribed in Table 1.
and Nickel Alloy Seamless Pipe and Tube
3. General Requirement
TABLE 1 Chemical Requirements
3.1 Material furnished under this specification shall con-
Element Composition, %
form to the applicable requirements of Specification B 829
Carbon, max 0.030
unless otherwise provided herein.
Silicon, max 1.0
Manganese, max 2.50
4. Ordering Information
Phosphorus, max 0.030
Sulfur, max 0.030
4.1 Orders for material under this specification shall include
Chromium 26.0–28.0
the following information:
Nickel 30.0–34.0
4.1.1 Alloy name or UNS number, Molybdenum 3.0–4.0
Copper 0.6–1.4
4.1.2 ASTM designation and year of issue,
A
Iron remainder
4.1.3 Dimensions—
A
Determined arithmetically by difference.
4.1.3.1 Outside diameter, minimum or average wall thick-
ness (in inches or millimetres, not gage number), and length,
4.1.3.2 Standard pipe size, schedule and length,
6.1.1 A chemical analysis shall be made on each lot of
4.1.4 Quantity (feet or metres, or number of pieces),
material as described in Specification B 829.
4.1.5 Optional requirements,
6.2 If a product (check) analysis is performed by the
4.1.6 Certification— State if certification is required,
purchaser, the material shall conform to Table 1 subject to the
4.1.7 Samples for Product (Check) Analysis—State whether
product (check) analysis variations prescribed in Specification
samples for product (check) analysis should be furnished, and
B 829.
4.1.8 Purchaser Inspection—If the purchaser wishes to
witness tests or inspection of material at the place of manu-
7. Mecha
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
An American National Standard Designation: B 668 – 00
Designation:B 668–99
Standard Specification for
UNSN08028Seamless TubesUNS N08028 Seamless Pipe and
Tube
This standard is issued under the fixed designation B 668; 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
1.1 This specification covers UNS N08028 seamless cold-finished tubesor hot finished pipe and tube intended for general
corrosive service. The general requirements are covered in Specification B 829B 829.
1.2 The values stated in inch-pound units are to be regarded as the standard.The values given in parentheses are for information
only.
2. Referenced Documents
2.1 ASTM Standards:
B 829 Specification for General Requirements for Nickel and Nickel Alloy Seamless Pipe and Tube
3. General Requirement
3.1 Material furnished under this specification shall conform to the applicable requirements of Specification B 829B 829 unless
otherwise provided herein.
4. Ordering Information
4.1 Orders for material under this specification shall include the following information:
4.1.1 Alloy name or UNS number,
4.1.2 ASTM designation and year of issue,
4.1.3 Dimensions—Outside diameter, minimum or average wall thickness (in inches or millimetres, not gage number), and
length (specific or random), —
4.1.3.1 Outside diameter, minimum or average wall thickness (in inches or millimetres, not gage number), and length,
4.1.3.2 Standard pipe size, schedule and length,
4.1.4 Quantity (feet or metres, or number of pieces),
4.1.5 Optional requirements,
4.1.6 Certification— State if certification is required,
4.1.7 Samples for Product (Check) Analysis—State whether samples for product (check) analysis should be furnished, and
4.1.8 Purchaser Inspection—If the purchaser wishes to witness tests or inspection of material at the place of manufacture, the
purchase order must so state, indicating which tests or inspections are to be witnessed.
5. Materials and Manufacture
5.1Tubes shall be made by the seamless process and shall be cold finished.
5.2Tubes shall be furnished in the solution-annealed condition.
5.1 Pipe and tube shall be furnished in the solution-annealed condition.
NOTE 1—The recommended heat treatment shall consist of heating the material to a temperature of 1975 to 2100°F (1080 to 1150°C) with subsequent
quenching in water or rapidly cooling by other means.
5.3The5.2 The scale shall be removed by suitable means. When bright annealed, scale removal operations are not necessary.
6. Chemical Composition
6.1 The material shall conform to the requirement prescribed in Table 1.
This specification is under the jurisdiction of ASTM Committee B-2 B02 on Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee B02.07 on
Refined Nickel and Cobalt and Their Alloys.
Current edition approved May 10, 1999.2000. Published July 1999.June 2000. Originally published as B 668 – 80. Last previous edition B 668 – 979.
Annua
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