ASTM B719-20

Standard Specification for Nickel-Chromium-Molybdenum-Cobalt-Tungsten-Iron-Silicon Alloy Bar

ABSTRACT
This specification covers the standard for hot-finished and cold-finished UNS N06333 alloy bars and flats proposed for use in heat resisting applications and general corrosive service. Materials shall conform to mechanical properties of the material such as tensile strength, yield strength, elongation, and hardness. Each specimen will be subjected to a chemical analysis, tension, Brinell hardness, and Rockwell hardness test.
SCOPE
1.1 This specification covers wrought alloy UNS N06333 in the form of hot-finished and cold-finished bars and flats 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 appropriate Material Safety Data Sheet (MSDS) 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: 31-Mar-2020
• 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

• Replaces: ASTM B719-00(2014) - Standard Specification for Nickel-Chromium-Molybdenum-Cobalt-Tungsten-<brk/>Iron-Silicon Alloy &#40;UNS N06333&#41; Bar
• Effective Date: 01-Apr-2020
• Refers: ASTM E18-18 - Standard Test Methods for Rockwell Hardness of Metallic Materials
• Effective Date: 01-Jul-2018
• Refers: ASTM E18-17 - Standard Test Methods for Rockwell Hardness of Metallic Materials
• Effective Date: 01-Jul-2017
• Refers: ASTM E10-14 - Standard Test Method for Brinell Hardness of Metallic Materials
• Effective Date: 01-May-2014
• Refers: ASTM E18-12 - Standard Test Methods for Rockwell Hardness of Metallic Materials
• Effective Date: 01-Dec-2012
• Refers: ASTM E10-12 - Standard Test Method for Brinell Hardness of Metallic Materials
• Effective Date: 01-Jan-2012
• Refers: ASTM E18-11 - Standard Test Methods for Rockwell Hardness of Metallic Materials
• Effective Date: 01-Nov-2011
• Refers: ASTM E10-10 - Standard Test Method for Brinell Hardness of Metallic Materials
• Effective Date: 01-Jun-2010
• Refers: ASTM E10-08 - Standard Test Method for Brinell Hardness of Metallic Materials
• Effective Date: 01-Dec-2008
• Refers: ASTM E29-08 - Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
• Effective Date: 01-Oct-2008
• Refers: ASTM E18-08a - Standard Test Methods for Rockwell Hardness of Metallic Materials <a href="#fn00002"></a>
• Effective Date: 15-May-2008
• Refers: ASTM B880-03(2008) - Standard Specification for General Requirements for Chemical Check Analysis Limits for Nickel, Nickel Alloys and Cobalt Alloys
• Effective Date: 01-Mar-2008
• Refers: ASTM E18-08 - Standard Test Methods for Rockwell Hardness of Metallic Materials
• Effective Date: 15-Jan-2008
• Refers: ASTM E18-07 - Standard Test Methods for Rockwell Hardness of Metallic Materials
• Effective Date: 01-Apr-2007
• Refers: ASTM E10-07a - Standard Test Method for Brinell Hardness of Metallic Materials
• Effective Date: 01-Apr-2007

Overview

ASTM B719-20: Standard Specification for Nickel-Chromium-Molybdenum-Cobalt-Tungsten-Iron-Silicon Alloy Bar defines the requirements for wrought alloy bars and flats made from UNS N06333. This specification covers both hot-finished and cold-finished product forms engineered for heat-resistant and general corrosive service applications. The standard details the composition, mechanical properties, dimensional tolerances, testing methods, certification, and marking requirements needed to ensure product consistency and performance.

ASTM B719-20 is published by ASTM International and is widely recognized in the metallurgical and manufacturing industries where high-performance nickel alloys are required for demanding operating conditions.

Key Topics

• Material Scope: The specification governs bars and flats produced from nickel-chromium-molybdenum-cobalt-tungsten-iron-silicon alloy (UNS N06333) for applications requiring resistance to both heat and corrosion.
• Product Forms:
  • Hot-finished and cold-finished bars in round, square, hexagonal, and octagonal sections.
  • Flats in widths up to 10 inches (254 mm).
• Mechanical Requirements:
  • Minimum tensile strength, yield strength, elongation, and informative hardness values are defined for quality assurance.
• Chemical Requirements:
  • Detailed composition limits for each alloying element including nickel, chromium, molybdenum, cobalt, tungsten, iron, silicon, and other trace elements.
• Testing and Inspection:
  • Standardized methods for chemical analysis, tension testing, Brinell and Rockwell hardness testing.
  • Product sampling and lot definitions to verify conformance.
• Dimensional Tolerances:
  • Permissible variations in size, length, straightness, and camber for both hot- and cold-finished products.
• Certification and Traceability:
  • Requirements for documentation, bundle marking, and heat number tracking.
• Safety and Compliance:
  • Users must review safety guidelines, Material Safety Data Sheets (MSDS), and comply with applicable regulations.

Applications

ASTM B719-20 is essential for specifying and ensuring the reliability of UNS N06333 alloy bar materials used in:

• Heat-Resistant Applications: This alloy's composition makes it ideal for environments with elevated temperatures, such as furnace components, heat exchangers, and energy sector equipment.
• Corrosive Environments: The alloy's inherent corrosion resistance supports use in chemical processing, petrochemical, and marine settings where aggressive agents are present.
• Manufacturing and Fabrication:
  • Structural components requiring both strength and surface integrity.
  • Parts subjected to high mechanical and thermal stresses.
• Quality Control: The standard ensures consistency and performance for end-users, fabricators, and procurement teams requiring traceable and certified nickel alloy bars.

Related Standards

When working with UNS N06333 and similar alloys, several ASTM standards provide additional requirements, reference methods, or complementary guidelines:

• ASTM B880 - Specification for general requirements on chemical analysis limits for nickel, nickel alloys, and cobalt alloys.
• ASTM E8/E8M - Test methods for tension testing of metallic materials.
• ASTM E10 - Brinell hardness testing of metallic materials.
• ASTM E18 - Rockwell hardness testing of metallic materials.
• ASTM E29 - Practice for significant digits in test data and conformity evaluation.
• ASTM E140 - Hardness conversion tables for metals.
• ASTM E1473 - Chemical analysis methodologies for nickel, cobalt, and high-temperature alloys.

By adhering to ASTM B719-20 and these related standards, manufacturers and end-users ensure the quality, performance, and traceability required for critical industrial applications involving nickel alloy bar products.

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:B719 −20
Standard Specification for
Nickel-Chromium-Molybdenum-Cobalt-Tungsten-Iron-Silicon
Alloy Bar
This standard is issued under the fixed designation B719; 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* E18 Test Methods for Rockwell Hardness of Metallic Ma-
terials
1.1 This specification covers wrought alloy UNS N06333 in
E29 Practice for Using Significant Digits in Test Data to
the form of hot-finished and cold-finished bars and flats
Determine Conformance with Specifications
intended for heat resisting applications and general corrosive
E140 Hardness Conversion Tables for Metals Relationship
service.
Among Brinell Hardness, Vickers Hardness, Rockwell
1.2 The values stated in inch-pound units are to be regarded
Hardness, Superficial Hardness, Knoop Hardness, Sclero-
as standard. The values given in parentheses are mathematical
scope Hardness, and Leeb Hardness
conversions to SI units that are provided for information only
E1473 Test Methods for Chemical Analysis of Nickel, Co-
and are not considered standard.
balt and High-Temperature Alloys
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
3. Terminology
responsibility of the user of this standard to become familiar
3.1 Definitions of Terms Specific to This Standard:
with all hazards including those identified in the appropriate
3.1.1 bars, n—material of round, hexagonal, octagonal, or
Material Safety Data Sheet (MSDS) for this product/material
square solid section, furnished in straight lengths, ⁄4 in. (6.35
as provided by the manufacturer, to establish appropriate
mm) and over in diameter or size.
safety, health, and environmental practices, and determine the
applicability of regulatory limitations prior to use. 3.1.2 flats, n—material ⁄4 to 10 in. (6.35 to 254 mm),
1.4 This international standard was developed in accor- inclusive, in width and 120 in. (3.05 mm) and over in
dance with internationally recognized principles on standard- thickness.
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
4. Ordering Information
mendations issued by the World Trade Organization Technical
4.1 It is the responsibility of the purchaser to specify all
Barriers to Trade (TBT) Committee.
requirements that are necessary for the safe and satisfactory
performance of material ordered under this specification.
2. Referenced Documents
Examples of such requirements include, but are not limited to,
2.1 ASTM Standards:
the following:
B880 Specification for General Requirements for Chemical
4.1.1 Alloy name or UNS number.
Check Analysis Limits for Nickel, Nickel Alloys and
4.1.2 Quantity.
Cobalt Alloys
4.1.3 ASTM Designation and year of issue.
E8 Test Methods for Tension Testing of Metallic Materials
[Metric] E0008_E0008M 4.1.4 Section (round, square, hexagonal, and so forth).
E10 Test Method for Brinell Hardness of Metallic Materials
4.1.5 Dimensions, including length.
4.1.6 Finish, hot or cold.
4.1.7 Certification—state if certification is required (Section
This specification is under the jurisdiction of ASTM Committee B02 on
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee 16).
B02.07 on Refined Nickel and Cobalt and Their Alloys.
4.1.8 Samples for Product (Check) Analysis—State whether
Current edition approved April 1, 2020. Published April 2020. Originally
samples shall be furnished.
approved in 1983. Last previous edition approved in 2014 as B719 – 00 (2014).
DOI: 10.1520/B0719-20.
4.1.9 Purchaser Inspection—If a purchaser wishes to wit-
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
ness tests or inspections of material at the place of
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
manufacture, the purchase order must so state indicating which
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. tests or inspections are to be witnessed.
*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
B719−20
TABLE 2 Mechanical Properties
5. Material and Manufacture
Elongation
5.1 All material shall be furnished in the annealed Tensile Yield Strength,
in 2 in. or 50
A
Strength, min 0.2 % offset, Hardness
condition, except that cold-drawn hexagons may be given a
mm, or 4D,
psi (MPa) min. psi (MPa)
min%
cold draw sizing pass subsequent to the final anneal.
80 000 (551) 35 000 (241) 30 75 to 95
HRB
NOTE 1—Hot-finished rectangular bar in widths 10 in. (254 mm) and
A
under may be furnished as hot-finished plate with sheared or cut edges.
Hardness values are informative only and not to be construed as the basis for
acceptance.
6. Chemical Requirements
6.1 The material shall conform to the requirements as to
10.2.2 Mechanical Properties—Samples of the material to
chemical composition specified in Table 1.
providetestspecimensformechanicalpropertiesshallbetaken
6.2 If a product (check) analysis is performed by the
from such locations in each lot as to be representative of that
purchaser, the material shall conform to the product (check)
lot.
analysis variations per Specification B880.
11. Number of Tests
7. Mechanical and Other Requirements
11.1 Chemical Analysis—One test per lot.
7.1 The mechanical properties of the material at room
11.2 Mechanical Properties—One test per lot.
temperature shall conform to those shown in Table 2.
12. Specimen Preparation
8. Permissible Variations in Dimensions
12.1 Tension-test specimens shall be taken from material in
8.1 All bars shall conform to the permissible variations in
the final condition and tested in the direction of fabrication.
dimensions specified in Tables 3-8, inclusive.
12.1.1 All material shall be tested in full cross-section size
when possible. When a full cross-section size test cannot be
9. Workmanship, Finish, and Appearance
performed, the largest possible round specimen in Test Meth-
9.1 The material shall be uniform in quality and condition,
ods E8 shall be used.
smooth, commercially straight, and free from injurious imper-
fections. 13. Test Methods
13.1 Determine the chemical composition, mechanical, and
10. Sampling
other properties of the material as enumerated in this
10.1 Lot Definitions:
specification, in case of disagreement, in accordance with the
10.1.1 A lot for chemical analysis shall consist of one heat.
following methods:
10.1.2 A lot for mechanical properties shall consist of
Test ASTM Designation
material from one heat of the same condition and cross section,
Chemical analysis E1473
and no more than 40 000 lb (18 100 kg) in mass.
Tension E8
10.2 Test Material Selection:
Brinell Hardness E10
Rockwell Hardness E18
10.2.1 Chemical Analysis—Representative samples from
Hardness Conversion E140
each lot shall be taken during pouring or subsequent process-
Rounding procedure E29
ing.
Requirement Rounded-Off Unit for Observed
10.2.1.1 Product (check) analysis shall be wholly the re-
or Calculated Value
sponsibility of the purchaser.
Chemical composition Nearest unit in the last right-
and tolerances hand place of figures of the
TABLE 1 Chemical Requirements (when expressed in specified limit. If two choices
decimals) are possible, as when the
Element Composition Limits, %
digits dropped are exactly a 5
Carbon 0.10 max
or a 5 followed only by zeros,
Manganese 2.0 max
choose the one ending in an
Phosphorus 0.03
even digit with zero defined as
Sulfur 0.03
an even digit.
Silicon 1.5 max
Tensile and yield Nearest 1000 psi (6.9 MPa)
Chromium 24.0–27.0
strengths
Nickel 44.0–48.0
Elongation Nearest 1 %
Molybdenum 2.5–4.0
Cobalt 2.5–4.0 14. Inspection
Tungsten 2.5–4.0
A
14.1 Inspection of the material by the purchaser shall be as
Iron remainder
A agreed upon by the purchaser and the supplier as part of the
Element may be determined arithmetically by difference.
purchase contract.
B719−20
TABLE 3 Permissible Variations in Size of Hot-Rolled Round and Square Bars
NOTE 1—Out of round is the difference between the maximum and minimum diameters of the bar, measured at the same cross section.
NOTE 2—Out of square section is the difference in the two dim
...

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: B719 − 00 (Reapproved 2014) B719 − 20
Standard Specification for
Nickel-Chromium-Molybdenum-Cobalt-Tungsten-Nickel-
Chromium-Molybdenum-Cobalt-Tungsten-Iron-Silicon
Iron-Silicon Alloy (UNS N06333) Bar
This standard is issued under the fixed designation B719; 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 hot-finished and cold-finished bars and flats 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 appropriate 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:
B880 Specification for General Requirements for Chemical Check Analysis Limits for Nickel, Nickel Alloys and Cobalt Alloys
E8 Test Methods for Tension Testing of Metallic Materials [Metric] E0008_E0008M
E10 Test Method for Brinell Hardness of Metallic Materials
E18 Test Methods for Rockwell Hardness of Metallic Materials
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E140 Hardness Conversion Tables for Metals Relationship Among Brinell Hardness, Vickers Hardness, Rockwell Hardness,
Superficial Hardness, Knoop Hardness, Scleroscope Hardness, and Leeb Hardness
E1473 Test Methods for Chemical Analysis of Nickel, Cobalt and High-Temperature Alloys
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 bars, n—material of round, hexagonal, octagonal, or square solid section, furnished in straight lengths, ⁄4 in. (6.35 mm)
and over in diameter or size.
3.1.2 flats, n—material ⁄4 to 10 in. (6.35 to 254 mm), inclusive, in width and 120 in. (3.05 mm) and over in thickness.
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:
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 October 2014April 2020. Originally approved in 1983. Last previous edition approved in 20092014 as
B719 – 00 (2009).00 (2014). DOI: 10.1520/B0719-00R14.10.1520/B0719-20.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. 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
B719 − 20
4.1.1 Alloy name or UNS number.
4.1.2 Quantity.
4.1.3 ASTM Designation and year of issue.
4.1.4 Section (round, square, hexagonal, and so forth).
4.1.5 Dimensions, including length.
4.1.6 Finish, hot or cold.
4.1.7 Certification—state if certification is required (Section 16).
4.1.8 Samples for Product (Check) Analysis—State whether samples shall be furnished.
4.1.9 Purchaser Inspection—If a purchaser wishes to witness tests or inspections of material at the place of manufacture, the
purchase order must so state indicating which tests or inspections are to be witnessed.
5. Material and Manufacture
5.1 All material shall be furnished in the annealed condition, except that cold-drawn hexagons may be given a cold draw sizing
pass subsequent to the final anneal.
NOTE 1—Hot-finished rectangular bar in widths 10 in. (254 mm) and under may be furnished as hot-finished plate with sheared or cut edges.
6. Chemical Requirements
6.1 The material shall conform to the requirements as to 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) analysis
variations per Specification B880.
7. Mechanical and Other Requirements
7.1 The mechanical properties of the material at room temperature shall conform to those shown in Table 2.
8. Permissible Variations in Dimensions
8.1 All bars shall conform to the permissible variations in dimensions specified in Tables 3-8, inclusive.
9. Workmanship, Finish, and Appearance
9.1 The material shall be uniform in quality and condition, smooth, commercially straight, and free from injurious
imperfections.
10. Sampling
10.1 Lot Definitions:
10.1.1 A lot for chemical analysis shall consist of one heat.
10.1.2 A lot for mechanical properties shall consist of material from one heat of the same condition and cross section, and no
more than 40 000 lb (18 100 kg) in mass.
10.2 Test Material Selection:
10.2.1 Chemical Analysis—Representative samples from each lot shall be taken during pouring or subsequent processing.
10.2.1.1 Product (check) analysis shall be wholly the responsibility of the purchaser.
10.2.2 Mechanical Properties—Samples of the material to provide test specimens for mechanical properties shall be taken from
such locations in each lot as to be representative of that lot.
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 24.0–27.0
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.
B719 − 20
TABLE 2 Mechanical Properties
Elongation
Tensile Yield Strength,
in 2 in. or 50
A
Strength, min 0.2 % offset, Hardness
mm, or 4D,
psi (MPa) min. psi (MPa)
min%
80 000 (551) 35 000 (241) 30 75 to 95
HRB
A
Hardness values are informative only and not to be construed as the basis for
acceptance.
11. Number of Tests
11.1 Chemical Analysis—One test per lot.
11.2 Mechanical Properties—One test per lot.
12. Specimen Preparation
12.1 Tension-test specimens shall be taken from material in the final condition and tested in the direction of fabrication.
12.1.1 All material shall be tested in full cross-section size when possible. When a full cross-section size test cannot be
performed, the largest possible round specimen in Test Methods E8 shall be used.
13. Test Methods
13.1 Determine the chemical composition, mechanical, and other properties of the material as enumerated in this specification,
in case of disagreement, in accordance with the following methods:
Test ASTM Designation
Chemical analysis E1473
Tension E8
Brinell Hardness E10
Rockwell Hardness E18
Hardness Conversion E140
Rounding procedure E29
Requirement Rounded-Off Unit for Observed
or Calculated Value
Chemical composition Nearest unit in the last right-
and tolerances hand place of figures of the
(when expressed in specified limit. If two choices
decimals) are possible, as when the
digits dropped are exactly a 5
or a 5 followed only by zeros,
choose the one ending in an
even digit with zero defined as
an even digit.
Tensile and yield Nearest 1000 psi (6.9 MPa)
strengths
Elongation Nearest 1 %
14. Inspection
14.1 Inspection of the material by the purchaser shall be as agreed upon by the purchaser and the supplier as part of the purchase
contract.
B719 − 20
TABLE 3 Permissible Variations in Size of Hot-Rolled Round and Square Bars
NOTE 1—Out of round is the differ
...