ASTM B723-20

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.
Designation: B723 − 00 (Reapproved 2014) B723 − 20
Standard Specification for
Nickel-Chromium-Molybdenum-Cobalt-Tungsten-Iron-Silicon
Alloy (UNS N06333) Welded Pipe
This standard is issued under the fixed designation B723; 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 Scope*
1.1 This specification covers wrought alloy UNS N06333 in the form of welded pipe intended for heat-resisting applications
and general corrosive service.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.3 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 appropriated Material Safety Data
Sheet (MSDS) for this product/material as provided by the manufacturer, to establish appropriate safety safety, health, and
healthenvironmental practices, and determine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
B775 Specification for General Requirements for Nickel and Nickel Alloy Welded Pipe
B718 Specification for Nickel-Chromium-Molybdenum-Cobalt-Tungsten-Iron-Silicon Alloy (UNS N06333) Plate, Sheet, and
Strip
3. General Requirement
3.1 Material furnished in accordance with this specification shall conform to the applicable requirements of the current edition
of Specification B775 unless otherwise provided herein.
4. Ordering Information
4.1 It is the responsibility of the purchaser to specify all requirements that are necessary for the safe and satisfactory
performance of material ordered under this specification. Examples of such requirements include, but are not limited to, the
following:
4.1.1 Alloy name or UNS number.
4.1.2 ASTM designation and year of issue.
4.1.3 Condition (temper) (Table 1).
4.1.4 Dimensions:
4.1.4.1 Nominal pipe size or outside diameter and schedule number or nominal wall thickness.
4.1.4.2 Length (specific or random).
4.1.5 Quantity (feet or metres, or number of pieces).
4.1.6 Certification—State if certification or a report of test results is required.
4.1.7 Samples for Product (Check) Analysis—State whether samples for product (check) analysis should be furnished.
This specification is under the jurisdiction of ASTM Committee 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 Oct. 1, 2014April 1, 2020. Published May 2020October 2014. . Originally approved in 1983. Last previous edition approved in 20092014 as
B723 – 00 (2009).(2014). DOI: 10.1520/B0723-00R14.10.1520/B0723-20.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
B723 − 20
TABLE 1 Chemical Requirements
Composition
Element
Limits, %
Carbon 0.10 max
Manganese 2.0 max
Phosphorus 0.03
Sulfur 0.03
Silicon 1.5 max
Chromium 24.0–27.0
Nickel 44.0–48.0
Molybdenum 2.5–4.0
Cobalt 2.5–4.0
Tungsten 2.5–4.0
A
Iron remainder
A
Element may be determined arithmetically by difference.
4.1.8 Purchaser Inspection—If purchaser wishes to witness tests or inspection of material at place of manufacture, the purchase
order must so state indicating which tests or inspections are to be witnessed.
5. Material and Manufacture
5.1 The pipe shall be made from flat-rolled alloy conforming to Specification B718, by an automatic welding process with no
addition of filler metal.
5.2 Pipe shall be furnished annealed after welding, with oxide removed. When final heat treatment is performed in a protective
atmosphere, descaling is not necessary.
6. Chemical Requirements
6.1 The material shall conform to the requirem
...