ASTM B726-02
(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 – 02
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.
TABLE 1 Chemical Requirements
1. Scope
Element Composition Limits, %
1.1 This specification covers alloy UNS N06333 in the form
Carbon 0.10 max
of welded tube intended for heat-resisting applications and
Manganese 2.0 max
general corrosive service.
Phosphorus 0.03
1.2 The values stated in inch-pound units are to be regarded
Sulfur 0.03
Silicon 1.5 max
as the standard. The values given in parentheses are for
Chromium 24.0 to 27.0
information only.
Nickel 44.0 to 48.0
1.3 The following precautionary statement pertains only to
Molybdenum 2.5 to 4.0
Cobalt 2.5 to 4.0
the test methods portion, Section 13, of this specification: This
Tungsten 2.5 to 4.0
standard does not purport to address all of the safety concerns,
A
Iron remainder
if any, associated with its use. It is the responsibility of the user
A
Element may be determined arithmetically by difference.
of this standard to become familiar with all hazards including
those identified in the appropriate Material Safety Data Sheet
4.1.2 ASTM designation and date of issue,
for this product/material as provided by the manufacturer, to
4.1.3 Dimensions (outside or inside diameter and nominal-
establish appropriate safety and health practices, and deter-
wall thickness),
mine the applicability of regulatory limitations prior to use.
4.1.4 Length (specific or random),
4.1.5 Quantity (feet or number of pieces),
2. Referenced Documents
4.1.6 Certification—State if certification is required,
2.1 ASTM Standards:
4.1.7 Samples for Product (Check) Analysis—State whether
B 718 Specification for Nickel-Chromium-Molybdenum-
samples should be furnished, and
Cobalt-Tungsten-Iron-Silicon Alloy (UNS N06333) Plate,
4.1.8 Purchaser Inspection—If purchaser wishes to witness
2
Sheet, and Strip
tests or inspection of material at place of manufacture, the
B 751 Specification for General Requirements for Nickel
purchase order must so state indicating which tests or inspec-
2
and Nickel Alloy Welded Tube
tions are to be witnessed.
3. General Requirement
5. Materials and Manufacture
3.1 Material furnished under this specification shall con-
5.1 The tube shall be made from flat-rolled alloy conform-
form to the applicable requirements of Specification B 751
ing to Specification B 718, by an automatic welding process
unless otherwise provided herein.Table 1
with no addition of filler metal.
5.2 Tube shall be furnished annealed after welding, with
4. Ordering Information
oxide removed. When the final heat treatment is performed in
4.1 It is the responsibility of the purchaser to specify all
a protective atmosphere, descaling is not necessary.
requirements that are necessary for material ordered to this
specification. Examples of such requirements include, but are
6. Chemical Composition
not limited to, the following:
6.1 The material shall conform to the requirements as to
4.1.1 Alloy or UNS number,
chemical composition specified in Table 1.
6.2 If a product (check) analysis is performed by the
purchaser, the material shall conform to the product (check)
1
This specification is under the jurisdiction of ASTM Committee B02 on analysis variations in Specification B 751.
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
B02.07 on Refined Nickel and Cobalt and Their Alloys.
7. Mechanical and Other Requirements
Current edition approved May 10, 2002. Published July 2002. Originally
7.1 The mechanical properties of the material at room
published as B 726 – 83. Last previous edition B 726 – 01.
2
Annual Book of ASTM Standards, Vol 02.04. temperature shall conform to those shown in Tables 2-4.
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B726–02
TABLE 2 Mechanical Properties
Tensile Elongation
Yield Strength,
Strength, in 2 in. or
A
0.2 % offset, Hardness
min, psi 50 mm, or
min, psi (MPa)
(MPa) 4D,min,%
80 000 35 000 30 75 to 95
(551) (241) HRB
A
Hardness values are informative only and not to be construed as the basis for
acceptance.
TABLE 3 Permissible Variations in Outside Diameter,
Ovality, and Wall Thickness of Welded Tube
NOTE 1—(1) These permissible variations in outside diameter apply
onlytotubesasfinishedatthemillbeforesubsequentswaging,expanding,
bending, polishing, or other fabricating operations. (2)
...
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