ASTM B726-95

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.

General Information

• Status: Historical
• Publication Date: 09-May-2002
• ICS: 77.120.40 - Nickel, chromium and their alloys
• Technical Committee: B02 - Nonferrous Metals and Alloys
• Drafting Committee: B02.07 - Refined Nickel and Cobalt and Their Alloys

Relations

• Replaced By: ASTM B726-01 - Standard Specification for Nickel-Chromium-Molybdenum-Cobalt-Tungsten-Iron-Silicon Alloy (UNS N06333) Welded Tube
• Effective Date: 10-May-2002

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NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn.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: B 726 – 95
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
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 4.1.6 Certification—State if certification is required,
4.1.7 Samples for Product (Check) Analysis—State whether
1.1 This specification covers alloy UNS N06333 in the form
samples should be furnished, and
of welded tube intended for heat-resisting applications and
4.1.8 Purchaser Inspection—If purchaser wishes to witness
general corrosive service.
1.2 The values stated in inch-pound units are to be regarded tests or inspection of material at place of manufacture, the
purchase order must so state indicating which tests or inspec-
as the standard. The values given in parentheses are for
information only. tions are to be witnessed.
1.3 The following precautionary statement pertains only to
5. Materials and Manufacture
the test methods portion, Section 13, of this specification: This
standard does not purport to address all of the safety concerns,
5.1 The tube shall be made from flat-rolled alloy conform-
if any, associated with its use. It is the responsibility of the user
ing to Specification B 718, by an automatic welding process
of this standard to establish appropriate safety and health
with no addition of filler metal.
practices and determine the applicability of regulatory limita-
5.2 Tube shall be furnished annealed after welding, with
tions prior to use.
oxide removed. When the final heat treatment is performed in
a protective atmosphere, descaling is not necessary.
2. Referenced Documents
2.1 ASTM Standards:
6. Chemical Composition
B 718 Specification for Nickel-Chromium-Molybdenum-
6.1 The material shall conform to the requirements as to
Cobalt-Tungsten-Iron-Silicon Alloy (UNS N06333) Plate,
2
chemical composition specified in Table 1.
Sheet, and Strip
6.2 If a product (check) analysis is performed by the
B 751 Specification for General Requirements for Nickel
2
purchaser, the material shall conform to the product (check)
and Nickel Alloy Seamless and Welded Tube
analysis variations in Specification B 751.
3. General Requirement
7. Mechanical and Other Requirements
3.1 Material furnished under this specification shall con-
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.
7.2 One test is required for each lot as defined in Specifi-
4. Ordering Information
cation B 751.
4.1 Orders for material to this specification should include
7.3 Flattening Test—A flattening test shall be made on each
information with respect to the following:
end of one tube per lot. Superficial ruptures resulting from
4.1.1 Alloy or UNS number,
surface imperfections shall not be cause for rejection.
4.1.2 ASTM designation and date of issue,
7.4 Flange Test—A flange test shall be made on each end of
4.1.3 Dimensions (outside or inside diameter and nominal-
one tube per lot.
wall thickness),
7.5 Nondestructive Test Requirements:
4.1.4 Length (specific or random),
7.5.1 Tubes shall be subjected to a pressure test or nonde-
4.1.5 Quantity (feet or number of pieces),
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 B-2 on
ter).
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
7.5.1.2 Electric Test—Eddy current or ultrasonic.
B02.07 on Refined Nickel and Cobalt, and Alloys Containing Nickel or Cobalt or
Both as Principal Constituents.
Current edition approved Oct. 10, 1995. Published December 1995. Originally
8. Keywords
published as B 726 – 83. Last previous edition B 726 – 91.
2
Annual Book of ASTM Standards, Vol 02.04. 8.1 UNS N06333; welded tube
1

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B 726
TABLE 1 Chemical Requirements
Element Composition Limits, %
Carbon 0.10 max
Manganese 2.0 max
Phosphorus 0.03
Sulfur 0.03
Silicon 1.5 max
Chromium 24.0 to 27.0
Nickel 44.0 to 48.0
Molybdenum 2.5 to 4.0
Cobalt 2.5 to 4.0
Tungsten 2.5 to 4.0
A
Iron remainder
A
Element may be determined arithmetically by difference.
TABLE 2 Mechanical Properties
Tensile Elongation
Yield Strength,
Strength, in 2 in. or
A
0.2 % offset, Hardness
min, p
...