ASTM B818-03(2018)
(Specification)Standard Specification for Cobalt-Chromium-Nickel-Molybdenum-Tungsten Alloy(UNS R31233) Plate, Sheet and Strip
Standard Specification for Cobalt-Chromium-Nickel-Molybdenum-Tungsten Alloy<brk/>(UNS R31233) Plate, Sheet and Strip
ABSTRACT
This specification covers the standard for cobalt-chromium-nickelmolybdenum-tungsten alloy UNS R31233 in the form of rolled plate, sheet, and strip proposed for use in wear applications and general corrosion service. Materials should conform to mechanical properties such as tensile strength, yield strength, and elongation.
SCOPE
1.1 This specification covers cobalt-chromium-nickel-molybdenum-tungsten alloy UNS R31233 in the form of rolled plate, sheet, and strip for wear applications and general corrosion service.
1.2 The following products are covered under this specification:
1.2.1 Sheet and Strip—Hot or cold rolled, annealed and descaled unless solution-annealing is performed in an atmosphere yielding a bright finish.
1.2.2 Plate—Hot rolled, solution-annealed, and descaled.
1.3 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.
1.4 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.
1.5 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-Oct-2018
- Technical Committee
- B02 - Nonferrous Metals and Alloys
- Drafting Committee
- B02.07 - Refined Nickel and Cobalt and Their Alloys
Relations
- Effective Date
- 01-Nov-2018
- Effective Date
- 01-Nov-2017
- Effective Date
- 01-May-2012
- Effective Date
- 01-Dec-2006
- Effective Date
- 10-Oct-2002
- Effective Date
- 10-Jun-2000
- Effective Date
- 01-Nov-2018
Overview
ASTM B818-03(2018) is a standard specification developed by ASTM International for cobalt-chromium-nickel-molybdenum-tungsten alloy (UNS R31233) in rolled plate, sheet, and strip forms. This international standard provides requirements for materials designed primarily for use in wear applications and general corrosion service. The scope includes mechanical and chemical property criteria, dimensions, permissible variations, and product marking for flat-rolled alloys used in demanding industrial environments.
Key Topics
Product Forms Covered:
- Plate: Hot rolled, solution-annealed, and descaled.
- Sheet & Strip: Hot or cold rolled, annealed and descaled unless a bright finish is specified through atmosphere-controlled solution annealing.
Chemical Composition Requirements:
The alloy consists of a precise balance of cobalt (remainder), chromium (23.5-27.5%), nickel (7.0-11.0%), molybdenum (4.0-6.0%), and tungsten (1.0-3.0%) among other elements, ensuring performance in critical environments.Mechanical Properties:
- Minimum tensile strength: 130 ksi (896 MPa)
- Minimum yield strength: 55 ksi (379 MPa)
- Minimum elongation: 15% in 2 inches (50.8 mm) or 4D
Dimensional and Physical Requirements:
Precise tolerances for thickness, straightness, squareness, and flatness for each product form are specified, ensuring consistency and quality in manufacturing and application.Safety and Regulatory Guidance:
Users must address relevant safety, health, and environmental considerations, consulting the material’s Safety Data Sheet (SDS) and observing all regulatory requirements.
Applications
The UNS R31233 cobalt-chromium-nickel-molybdenum-tungsten alloy detailed in ASTM B818 is extensively used where exceptional wear resistance and corrosion protection are required. Typical application areas include:
- Aerospace components exposed to aggressive environments
- Chemical processing equipment where resistance to corrosive chemicals is critical
- Industrial valve parts, pump components, and other high-stress mechanical systems
- Medical instruments and devices requiring biocompatibility and durability
- Power generation equipment and heat exchangers demanding long service life under harsh conditions
Material supplied under this specification is suited for both fresh manufacture and maintenance replacements in sectors such as petrochemicals, refining, and heavy machinery.
Related Standards
For a comprehensive understanding of requirements and compatibility, refer to the following related ASTM standards:
- ASTM B906: Specification for General Requirements for Flat-Rolled Nickel and Nickel Alloys Plate, Sheet, and Strip
Covers general requirements applicable to the flat-rolled alloy products, complementing ASTM B818 for additional product analysis, quality assurance, and delivery specifications.
Additional adherence to international standardization principles ensures global recognition and compliance, aiding in trade and procurement across markets.
Keywords: ASTM B818, UNS R31233, cobalt-chromium-nickel-molybdenum-tungsten alloy, plate, sheet, strip, wear applications, corrosion-resistant alloys, material specification, mechanical properties, industrial standards, ASTM International.
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Frequently Asked Questions
ASTM B818-03(2018) is a technical specification published by ASTM International. Its full title is "Standard Specification for Cobalt-Chromium-Nickel-Molybdenum-Tungsten Alloy<brk/>(UNS R31233) Plate, Sheet and Strip". This standard covers: ABSTRACT This specification covers the standard for cobalt-chromium-nickelmolybdenum-tungsten alloy UNS R31233 in the form of rolled plate, sheet, and strip proposed for use in wear applications and general corrosion service. Materials should conform to mechanical properties such as tensile strength, yield strength, and elongation. SCOPE 1.1 This specification covers cobalt-chromium-nickel-molybdenum-tungsten alloy UNS R31233 in the form of rolled plate, sheet, and strip for wear applications and general corrosion service. 1.2 The following products are covered under this specification: 1.2.1 Sheet and Strip—Hot or cold rolled, annealed and descaled unless solution-annealing is performed in an atmosphere yielding a bright finish. 1.2.2 Plate—Hot rolled, solution-annealed, and descaled. 1.3 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. 1.4 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. 1.5 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.
ABSTRACT This specification covers the standard for cobalt-chromium-nickelmolybdenum-tungsten alloy UNS R31233 in the form of rolled plate, sheet, and strip proposed for use in wear applications and general corrosion service. Materials should conform to mechanical properties such as tensile strength, yield strength, and elongation. SCOPE 1.1 This specification covers cobalt-chromium-nickel-molybdenum-tungsten alloy UNS R31233 in the form of rolled plate, sheet, and strip for wear applications and general corrosion service. 1.2 The following products are covered under this specification: 1.2.1 Sheet and Strip—Hot or cold rolled, annealed and descaled unless solution-annealing is performed in an atmosphere yielding a bright finish. 1.2.2 Plate—Hot rolled, solution-annealed, and descaled. 1.3 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. 1.4 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. 1.5 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.
ASTM B818-03(2018) is classified under the following ICS (International Classification for Standards) categories: 77.150.70 - Cadmium and cobalt products. The ICS classification helps identify the subject area and facilitates finding related standards.
ASTM B818-03(2018) has the following relationships with other standards: It is inter standard links to ASTM B818-03(2013), ASTM B906-02(2017), ASTM B906-02(2012), ASTM B906-02(2006), ASTM B906-02, ASTM B906-00, ASTM B906-22. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ASTM B818-03(2018) is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
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:B818 −03 (Reapproved 2018)
Standard Specification for
Cobalt-Chromium-Nickel-Molybdenum-Tungsten Alloy
(UNS R31233) Plate, Sheet and Strip
This standard is issued under the fixed designation B818; 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 B906 Specification for General Requirements for Flat-
Rolled Nickel and Nickel Alloys Plate, Sheet, and Strip
1.1 This specification covers cobalt-chromium-nickel-
molybdenum-tungsten alloy UNS R31233 in the form of rolled
3. Terminology
plate, sheet, and strip for wear applications and general
corrosion service. 3.1 Definitions of Terms Specific to This Standard:
3.1.1 plate—material ⁄16 in. (4.76 mm) and over in thick-
1.2 The following products are covered under this specifi-
ness.
cation:
1.2.1 Sheet and Strip—Hot or cold rolled, annealed and
3.1.2 sheet and strip—material under ⁄16 in. (4.76 mm) in
descaled unless solution-annealing is performed in an atmo-
thickness.
sphere yielding a bright finish.
1.2.2 Plate—Hot rolled, solution-annealed, and descaled.
4. General Requirements
1.3 The values stated in inch-pound units are to be regarded
4.1 Material furnished under this specification shall con-
as standard. The values given in parentheses are mathematical
form to the applicable requirements of Specification B906
conversions to SI units that are provided for information only
unless otherwise provided herein.
and are not considered standard.
1.4 This standard does not purport to address all of the
5. Ordering Information
safety concerns, if any, associated with its use. It is the
5.1 It is the responsibility of the purchaser to specify all
responsibility of the user of this standard to become familiar
requirements that are necessary for material ordered under this
with all hazards including those identified in the appropriate
specification. Examples of such requirements include, but are
Safety Data Sheet (SDS) for this product/material as provided
not limited to, the following:
by the manufacturer, to establish appropriate safety, health,
5.1.1 Alloy.
and environmental practices, and determine the applicability
of regulatory limitations prior to use. 5.1.2 Dimensions—Thickness (in decimals of an inch),
1.5 This international standard was developed in accor- width, and length (inch or fraction of an inch).
dance with internationally recognized principles on standard-
5.1.3 Certification—State if a report of test results is re-
ization established in the Decision on Principles for the
quired (see Specification B906, Section 21).
Development of International Standards, Guides and Recom-
5.1.4 Optional Requirement—Plate; state how plate is to be
mendations issued by the World Trade Organization Technical
cut (see Specification B906, Table A2.3).
Barriers to Trade (TBT) Committee.
5.1.5 Purchase Inspection—State which tests or inspections
are to be witnessed (see Specification B906, Section 18).
2. Referenced Documents
5.1.6 Samples, for Product (Check) Analysis—State whether
2.1 ASTM Standards:
samples should be furnished (see Specification B906, Section
7.2.2).
This specification is under the jurisdiction of ASTM Committee B02 on
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
6. Chemical Composition
B02.07 on Refined Nickel and Cobalt and Their Alloys.
Current edition approved Nov. 1, 2018. Published November 2018. Originally
6.1 The material shall conform to the requirements as to
approved in 1991. Last previous edition approved in 2013 as B818 – 03 (2013).
chemical composition prescribed in Table 1.
DOI: 10.1520/B0818-03R18.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
6.2 If a product (check) analysis is made by the purchaser,
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
the material shall conform to the requirements specified in
Standards volume information, refer to the standard’s Document Summary page on
the ASTM webs
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