ASTM B726-01
(Specification)Standard Specification for Nickel-Chromium-Molybdenum-Cobalt-Tungsten-Iron-Silicon Alloy (UNS N06333) Welded Tube
Standard Specification for Nickel-Chromium-Molybdenum-Cobalt-Tungsten-Iron-Silicon Alloy (UNS N06333) Welded Tube
SCOPE
1.1 This specification covers alloy UNS N06333 in the form of welded tube intended for heat-resisting applications and general corrosive service.
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.
1.3 The following precautionary statement pertains only to the test methods portion, Section 13, of this specification:This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to become familiar with all hazards including those identified in the appropriate Material Safety Data Sheet for this product/material as provided by the manufacturer, to establish appropriate safety and health practices, and determine the applicability of regulatory limitations prior to use.
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Designation: B 726 – 01
Standard Specification for
Nickel-Chromium-Molybdenum-Cobalt-Tungsten-Iron-Silicon
1
Alloy (UNS N06333) Welded Tube
This standard is issued under the fixed designation B 726; 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 4.1.4 Length (specific or random),
4.1.5 Quantity (feet or number of pieces),
1.1 This specification covers alloy UNS N06333 in the form
4.1.6 Certification—State if certification is required,
of welded tube intended for heat-resisting applications and
4.1.7 Samples for Product (Check) Analysis—State whether
general corrosive service.
samples should be furnished, and
1.2 The values stated in inch-pound units are to be regarded
4.1.8 Purchaser Inspection—If purchaser wishes to witness
as the standard. The values given in parentheses are for
tests or inspection of material at place of manufacture, the
information only.
purchase order must so state indicating which tests or inspec-
1.3 The following precautionary statement pertains only to
tions are to be witnessed.
the test methods portion, Section 13, of this specification: This
standard does not purport to address all of the safety concerns,
5. Materials and Manufacture
if any, associated with its use. It is the responsibility of the user
5.1 The tube shall be made from flat-rolled alloy conform-
of this standard to establish appropriate safety and health
ing to Specification B 718, by an automatic welding process
practices and determine the applicability of regulatory limita-
with no addition of filler metal.
tions prior to use.
5.2 Tube shall be furnished annealed after welding, with
2. Referenced Documents oxide removed. When the final heat treatment is performed in
a protective atmosphere, descaling is not necessary.
2.1 ASTM Standards:
B 718 Specification for Nickel-Chromium-Molybdenum-
6. Chemical Composition
Cobalt-Tungsten-Iron-Silicon Alloy (UNS N06333) Plate,
2
6.1 The material shall conform to the requirements as to
Sheet, and Strip
chemical composition specified in Table 1.
B 751 Specification for General Requirements for Nickel
2
6.2 If a product (check) analysis is performed by the
and Nickel Alloy Seamless and Welded Tube
purchaser, the material shall conform to the product (check)
3. General Requirement analysis variations in Specification B 751.
3.1 Material furnished under this specification shall con-
7. Mechanical and Other Requirements
form to the applicable requirements of Specification B 751
7.1 The mechanical properties of the material at room
unless otherwise provided herein.
temperature shall conform to those shown in Tables 2-4.
4. Ordering Information 7.2 One test is required for each lot as defined in Specifi-
cation B 751.
4.1 It is the responsibility of the purchaser to specify all
7.3 Flattening Test—A flattening test shall be made on each
requirements that are necessary for material ordered under this
end of one tube per lot. Superficial ruptures resulting from
specification. Examples of such requirements include, but are
surface imperfections shall not be cause for rejection.
not limited to, the following:
7.4 Flange Test—A flange test shall be made on each end of
4.1.1 Alloy or UNS number,
one tube per lot.
4.1.2 ASTM designation and date of issue,
7.5 Nondestructive Test Requirements:
4.1.3 Dimensions (outside or inside diameter and nominal-
7.5.1 Tubes shall be subjected to a pressure test or nonde-
wall thickness),
structive electric test at the manufacturer’s option.
7.5.1.1 Leak Test—Hydrostatic or pneumatic (air underwa-
1
This specification is under the jurisdiction of ASTM Committee B02 on
ter).
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
B02.07 on Refined Nickel and Cobalt and Their Alloys.
Current edition approved Nov. 10, 2001. Published January 2002. Originally
published as B 726 – 83. Last previous edition B 726 – 95.
2
Annual Book of ASTM Standards, Vol 02.04.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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B 726
A
TABLE 1 Chemical Requirements TABLE 4 Permissible Variations in Length
Element Composition Limits, % Outside Diameter, Cut Length, in. (mm)
in. (mm) Over Under
Carbon 0.10 max
1
Under 2 (50.8) ⁄8 (3.2) 0
Manganese 2.0 max
3
2 (50.8) and over ⁄16 (4.8) 0
Phosphorus 0.03
A
Sulfur 0.03 These permissible variations in length apply to tube before bending. They
apply to cut lengths up to and including 24 ft (7.3 m). For lengths over 24 ft (7.3 m),
Silicon 1.5 max
1
Chromium 24.0 to 27.0 and additional ov
...
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