ASTM B446-19

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: B446 − 03 (Reapproved 2014) B446 − 19
Standard Specification for
Nickel-Chromium-Molybdenum-Columbium Alloy (UNS
N06625), Nickel-Chromium-Molybdenum-Silicon Alloy (UNS
N06219), and Nickel-Chromium-Molybdenum-Tungsten Alloy
1
(UNS N06650) Rod and Bar
This standard is issued under the fixed designation B446; 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 Scope*
1.1 This specification covers nickel-chromium-molybdenum-columbium (UNS N06625), nickel-chromium-molybdenum-
2
silicon alloy (UNS N06219), and Nickel-Chromium-Molybdenum-Tungsten Alloy (UNS N06650) in the form of hot-worked rod
and bar and cold-worked rod in the conditions shown in Table 1.
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 N06650 are supplied in 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 12, of this specification:This cThis
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
(MSDS)(SDS) 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
3
2.1 ASTM Standards:
B443 Specification for Nickel-Chromium-Molybdenum-Columbium Alloy(UNS N06625) and Nickel-Chromium-Molybdenum-
SiliconAlloy (UNS N06219) Plate, Sheet, and Strip
B880 Specification for General Requirements for Chemical Check Analysis Limits for Nickel, Nickel Alloys and Cobalt Alloys
E8E8/E8M Test Methods for Tension Testing of Metallic Materials [Metric] E0008_E0008M
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E1473 Test Methods for Chemical Analysis of Nickel, Cobalt and High-Temperature Alloys
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 Oct. 1, 2014April 1, 2019. Published October 2014April 2019. Originally approved in 1966. Last previous edition approved in 20082014 as
ε1
B446– 03 (2008)(2014). . DOI: 10.1520/B0446-03R14.10.1520/B0446-19.
2
New designation Designation (UNS N06650) was established in accordance with Practice E527 and SAE J 1086, Practice for Numbering Metals and Alloys (UNS).
3
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
1

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B446 − 19
TABLE 1 Conditions for Hot-Worked Rod and Bar and Cold-
A
Worked Rod
Tensile Yield Elongation
Diameter or Distance
Strength Strength in 2 in
...

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: B446 − 19
Standard Specification for
Nickel-Chromium-Molybdenum-Columbium Alloy (UNS
N06625), Nickel-Chromium-Molybdenum-Silicon Alloy (UNS
N06219), and Nickel-Chromium-Molybdenum-Tungsten Alloy
1
(UNS N06650) Rod and Bar
This standard is issued under the fixed designation B446; 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* establish appropriate safety, health, and environmental
practices, and determine the applicability of regulatory limi-
1.1 This specification covers nickel-chromium-
tations prior to use.
molybdenum-columbium (UNS N06625), nickel-chromium-
1.4 This international standard was developed in accor-
molybdenum-silicon alloy (UNS N06219), and Nickel-
2 dance with internationally recognized principles on standard-
Chromium-Molybdenum-Tungsten Alloy (UNS N06650) in
ization established in the Decision on Principles for the
the form of hot-worked rod and bar and cold-worked rod in the
Development of International Standards, Guides and Recom-
conditions shown in Table 1.
mendations issued by the World Trade Organization Technical
1.1.1 UNS N06625 products are furnished in two grades of
Barriers to Trade (TBT) Committee.
different heat-treated conditions:
1.1.1.1 Grade 1 (Annealed)—Material is normally em-
2. Referenced Documents
ployed in service temperatures up to 1100°F (593°C).
3
2.1 ASTM Standards:
1.1.1.2 Grade 2 (Solution Annealed)—Material is normally
B443 Specification for Nickel-Chromium-Molybdenum-
employed in service temperatures above 1100°F (593°C) when
Columbium Alloy(UNS N06625) and Nickel-Chromium-
resistance to creep and rupture is required.
Molybdenum-SiliconAlloy (UNS N06219) Plate, Sheet,
NOTE 1—Hot-working or reannealing may change properties
and Strip
significantly, depending on working history and temperatures.
B880 Specification for General Requirements for Chemical
1.1.2 Alloys UNS N06219 and UNS N06650 are supplied in
Check Analysis Limits for Nickel, Nickel Alloys and
solution annealed condition only.
Cobalt Alloys
1.2 The values stated in inch-pound units are to be regarded E8/E8M Test Methods for Tension Testing of Metallic Ma-
as standard. The values given in parentheses are mathematical
terials
conversions to SI units that are provided for information only E29 Practice for Using Significant Digits in Test Data to
and are not considered standard.
Determine Conformance with Specifications
E1473 Test Methods for Chemical Analysis of Nickel, Co-
1.3 The following precautionary caveat pertains only to the
balt and High-Temperature Alloys
test methods portion, Section 12, of this specification: cThis
standard does not purport to address all of the safety concerns,
3. Terminology
if any, associated with its use. It is the responsibility of the user
of this standard to become familiar with all hazards including 3.1 Definitions of Terms Specific to This Standard:
those identified in the appropriate Safety Data Sheet (SDS) for 3.1.1 bar, n—material of rectangular (flats) or square solid
1
this product/material as provided by the manufacturer, to section up to and including 10 in. (254 mm) in width and ⁄8 in.
(3.2 mm) and over in thickness in straight lengths.
3.1.1.1 Discussion—Hot-worked rectangular bar in widths
1
This specification is under the jurisdiction of ASTM Committee B02 on
10 in. (254 mm) and under may be furnished as hot-rolled plate
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, 2019. Published April 2019. Originally
3
approved in 1966. Last previous edition approved in 2014 as B446– 03 (2014). DOI: For referenced ASTM standards, visit the ASTM website, www.astm.org, or
10.1520/B0446-19. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
2
Designation (UNS N06650) was established in accordance with Practice E527 Standards volume information, refer to the standard’s Document Summary page on
and SAE 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

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B446 − 19
TABLE 1 Conditions for Hot-Worked Rod and Bar and Cold- TABLE 4 Permissible Variations in Diameter or Distance Between
A
Worked Rod Parallel Surfaces of Hot-Worked Rod and Bar
Tensile Yield
...