ASTM B444-23

Standard Specification for Nickel-Chromium-Molybdenum-Niobium Alloys<brk/> and Nickel-Chromium-Molybdenum-Silicon Alloy Pipe and Tube

ABSTRACT
This specification covers UNS N06625 and UNS N06852 nickel-chromium-molybdenum-columbium alloys and UNS N06219 nickel-chromium-molybdenum-silicon alloy in the form of cold-worked seamless pipe and tube. UNS N06625 products are furnished in annealed Grade 1 and solution annealed Grade 2 while UNS N06219 and UNS N06852 are in solution annealed condition only. Chemical testing shall be performed on each type of material and shall conform to the chemical composition limits specified for carbon, manganese, silicon, phosphorus, sulfur, chromium, tantalum, columbium, cobalt, molybdenum, iron, aluminum, titanium, copper, and nickel. The material shall undergo tensile testing and shall conform to the required room temperature tensile properties like tensile strength, yield strength, and elongation depending on the heat treatment used and including small diameter and light-walled tubing. Each pipe or tube shall undergo hydrostatic testing and shall conform to the allowable fiber stress and also be examined with a nondestructive electric test as prescribed.
SCOPE
1.1 This specification2 covers nickel-chromium-molybdenum-niobium alloys (UNS N06625 and UNS N06852) and nickel-chromium-molybdenum-silicon alloy (UNS N06219)3 in the form of cold-worked seamless pipe and tube. The general requirements for pipe and tube are covered by Specification B829.  
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 The following precautionary caveat pertains only to the test methods portion, Section 8, 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 Safety Data Sheet (SDS) for this product/material as provided by the manufacturer, to establish appropriate safety, health, and environmental 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.

General Information

• Status: Published
• Publication Date: 30-Jun-2023
• ICS: 77.150.40 - Nickel and chromium products
• Technical Committee: B02 - Nonferrous Metals and Alloys
• Drafting Committee: B02.07 - Refined Nickel and Cobalt and Their Alloys

Standards Content (Sample)

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.
Designation: B444 − 23
Standard Specification for
Nickel-Chromium-Molybdenum-Niobium Alloys
and Nickel-Chromium-Molybdenum-Silicon Alloy Pipe and
1
Tube
This standard is issued under the fixed designation B444; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope* 2. Referenced Documents
4
2
2.1 ASTM Standards:
1.1 This specification covers nickel-chromium-
B829 Specification for General Requirements for Nickel and
molybdenum-niobium alloys (UNS N06625 and UNS
Nickel Alloys Seamless Pipe and Tube
N06852) and nickel-chromium-molybdenum-silicon alloy
3 B880 Specification for General Requirements for Chemical
(UNS N06219) in the form of cold-worked seamless pipe and
Check Analysis Limits for Nickel, Nickel Alloys and
tube. The general requirements for pipe and tube are covered
Cobalt Alloys
by Specification B829.
B899 Terminology Relating to Non-ferrous Metals and Al-
1.2 The values stated in inch-pound units are to be regarded loys
E112 Test Methods for Determining Average Grain Size
as standard. The values given in parentheses are mathematical
G28 Test Methods for Detecting Susceptibility to Inter-
conversions to SI units that are provided for information only
granular Corrosion in Wrought, Nickel-Rich, Chromium-
and are not considered standard.
Bearing Alloys
1.3 The following precautionary caveat pertains only to the
G48 Test Methods for Pitting and Crevice Corrosion Resis-
test methods portion, Section 8, of this specification: This
tance of Stainless Steels and Related Alloys by Use of
standard does not purport to address all of the safety concerns,
Ferric Chloride Solution
if any, associated with its use. It is the responsibility of the user
3. Terminology
of this standard to become familiar with all hazards including
those identified in the appropriate Safety Data Sheet (SDS) for
3.1 Definition of Terms:
this product/material as provided by the manufacturer, to
3.1.1 The terms and definitions of Terminology B899 apply.
establish appropriate safety, health, and environmental
4. Ordering Information
practices, and determine the applicability of regulatory limi-
tations prior to use.
4.1 Orders for material to this specification shall include
information with respect to the following:
1.4 This international standard was developed in accor-
4.1.1 Alloy name or UNS number,
dance with internationally recognized principles on standard-
4.1.2 ASTM designation,
ization established in the Decision on Principles for the
4.1.3 Condition (temper) (see 5.2, 5.3, Table 1, and Annex
Development of International Standards, Guides and Recom-
A1),
mendations issued by the World Trade Organization Technical
4.1.3.1 If neither grade of N06625 is specified, Grade 1 will
Barriers to Trade (TBT) Committee.
be supplied.
4.1.4 Finish (See Appendix X1.1),
4.1.5 Dimensions:
1
This specification is under the jurisdiction of ASTM Committee B02 on
4.1.5.1 Tube—Specify outside diameter and nominal or
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
minimum wall,
B02.07 on Refined Nickel and Cobalt and Their Alloys.
4.1.5.2 Pipe—Specify standard pipe size and schedule,
Current edition approved July 1, 2023. Published July 2023. Originally approved
in 1966. Last previous edition approved in 2018 as B444 – 18. DOI: 10.1520/
B0444-23.
2 4
For ASME Boiler and Pressure Vessel Code applications see related Specifi- For referenced ASTM standards, visit the ASTM website, www.astm.org, or
cation SB-444 in Section II of that Code. contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
3
New designation established in accordance with Practice E527 and SAE Standards volume information, refer to the standard’s Document Summary page on
J 1086, Practice for Numbering Metals and Alloys (UNS). 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
1

---------------------- Page: 1 ----------------------
B444 − 23
TABLE 1 Room Temperature Tensile Properties and Heat
5.3 Alloys UNS N06219 and UNS N06852 are supplied in
A,B
Treatment
the solution annealed condition only.
Yield Elongation
Tensile Strength in
6. Chemical Composition
Strength, (0.2 % 2 in.
Condition
min, ksi offset), or 50.8 mm
6.1 The material shall conform
...

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: B444 − 18 B444 − 23
Standard Specification for
Nickel-Chromium-Molybdenum-ColumbiumNickel-
Chromium-Molybdenum-Niobium Alloys
(UNS N06625 and UNS N06852) and Nickel-Chromium-
Molybdenum-Silicon Alloy (UNS N06219) and Nickel-
1
Chromium-Molybdenum-Silicon Alloy Pipe and Tube
This standard is issued under the fixed designation B444; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope*
2
1.1 This specification covers nickel-chromium-molybdenum-columbiumnickel-chromium-molybdenum-niobium alloys (UNS
3
N06625 and UNS N06852) and nickel-chromium-molybdenum-silicon alloy (UNS N06219) in the form of cold-worked seamless
pipe and tube. The general requirements for pipe and tube are covered by Specification B829.
1.1.1 UNS N06625 products are furnished in two grades of different heat-treated conditions:
1.1.1.1 Grade 1 (annealed)—Material is normally employed in service temperatures up to 1100°F (593°C).
1.1.1.2 Grade 2 (solution annealed)—Material is normally employed in service temperatures above 1100°F (593°C) when
resistance to creep and rupture is required.
NOTE 1—Hot-working or reannealing may change properties significantly, depending on working history and temperatures.
1.1.2 Alloys UNS N06219 and UNS N06852 are supplied in the solution annealed condition only.
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 The following precautionary caveat pertains only to the test methods portion, Section 98, 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 Safety Data Sheet (SDS) for this
product/material as provided by the manufacturer, to establish appropriate safety, health, and environmental practices, and
determine the applicability of regulatory limitations prior to use.
1
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 April 1, 2018July 1, 2023. Published April 2018July 2023. Originally approved in 1966. Last previous edition approved in 20162018 as
ɛ1
B444 – 16B444 – 18. . DOI: 10.1520/B0444-18.10.1520/B0444-23.
2
For ASME Boiler and Pressure Vessel Code applications see related Specification SB-444 in Section II of that Code.
3
New designation established in accordance with Practice E527 and SAE J 1086, Practice for Numbering Metals and Alloys (UNS).
*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
1

---------------------- Page: 1 ----------------------
B444 − 23
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
4
2.1 ASTM Standards:
B829 Specification for General Requirements for Nickel and Nickel Alloys Seamless Pipe and Tube
B880 Specification for General Requirements for Chemical Check Analysis Limits for Nickel, Nickel Alloys and Cobalt Alloys
B899 Terminology Relating to Non-ferrous Metals and Alloys
E112 Test Methods for Determining Average Grain Size
G28 Test Methods for Detecting Susceptibility to Intergranular Corrosion in Wrought, Nickel-Rich, Chromium-Bearing Alloys
G48 Test Methods for Pitting and Crevice Corrosion Resistance of Stainless Steels and Related Alloys by Use of Ferric Chloride
Solution
3. General Requirement Terminology
3.1 Material furnished under this specification shall conform to the applicable requirements of Specification B829 unless otherwise
provided herein.Definition of Terms:
3.1.1 The terms and definitions of Terminology B8
...