ASTM A892-09(2020)
(Guide)Standard Guide for Defining and Rating the Microstructure of High Carbon Bearing Steels
Standard Guide for Defining and Rating the Microstructure of High Carbon Bearing Steels
ABSTRACT
This guide covers the definition and rating of the microstructure of carbide structures in annealed high carbon bearing steels. Requirements for the optical metallograph apparatus and specimen preparation including polishing and etching are detailed. The description of the reference photomicrographs (graded illustrations of annealed carbides categorized by size, network, and lamellar content (shape)) that shall be used in the evaluation and the equation that shall define the rating are given.
SCOPE
1.1 This guide covers the description of carbide structures in annealed high carbon bearing steels.
1.2 Included is a guide for rating steel specimens by a graded series of photomicrographs showing the incidence of certain conditions.
1.3 The reference photomicrographs are graded illustrations of annealed carbides categorized by size, network, and lamellar content (shape).
1.4 This guide is to facilitate communication and description of microstructure. It does not establish limits of acceptability. Such limits are a matter of agreement between user and producer.
1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.6 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 establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.7 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
- 29-Feb-2020
- Technical Committee
- A01 - Steel, Stainless Steel and Related Alloys
- Drafting Committee
- A01.28 - Bearing and Power Transmission Steels
Relations
- Effective Date
- 01-Mar-2020
- Effective Date
- 01-Nov-2023
- Effective Date
- 01-Jun-2015
- Effective Date
- 01-Oct-2008
- Effective Date
- 01-Jul-2007
- Effective Date
- 01-Jul-2007
- Effective Date
- 01-May-2007
- Effective Date
- 10-Jan-2003
- Effective Date
- 10-Apr-2001
- Effective Date
- 10-Apr-2001
- Effective Date
- 01-Jan-2000
- Effective Date
- 01-Jan-2000
- Effective Date
- 10-Oct-1999
- Referred By
ASTM A295/A295M-14(2020) - Standard Specification for High-Carbon Anti-Friction Bearing Steel - Effective Date
- 01-Mar-2020
Overview
ASTM A892-09(2020), Standard Guide for Defining and Rating the Microstructure of High Carbon Bearing Steels, is an international standard developed by ASTM. This guide provides methods for describing and rating the microstructure of annealed high carbon bearing steels by examining carbide structures. The standard is essential for quality control and assurance in the production and use of bearing steels, ensuring clear communication between users and producers regarding key microstructural features.
The standard covers equipment requirements, specimen preparation, and the use of reference photomicrographs for systematic microstructural evaluation. It is widely recognized for supporting objective, repeatable assessment in the steel and bearing industries.
Key Topics
- Carbide Structure Description: Provides a framework for describing the microstructure of carbides found in annealed high carbon bearing steels, focusing on characteristics such as carbide size, network formation, and lamellar content.
- Photomicrograph Rating System: Specifies the use of a graded series of photomicrographs as reference images. These are categorized by:
- Carbide Size (CS)
- Carbide Network (CN)
- Lamellar Content (LC) There are six gradations in each category, with higher numbers indicating greater severity.
- Specimen Preparation: Details the process for preparing steel specimens, including sampling, polishing, and etching. Proper preparation following ASTM E3 and E407 ensures accurate microstructural assessment.
- Optical Metallography: Recommends evaluation at 1000× magnification to ensure sufficient resolution for analysis.
- Objective Rating Methods: Supports ratings by visual comparison with reference photomicrographs or by automatic image analysis according to ASTM E1245.
- Communication and Documentation: Facilitates consistent terminology and reporting in technical documentation and contracts between steel producers and users.
Applications
The ASTM A892-09(2020) standard is widely used in the steelmaking, bearing manufacturing, and metallurgical testing sectors. Key applications include:
- Quality Control: Ensures consistent monitoring of microstructure in high carbon bearing steels. Producers can document compliance with agreed microstructural profiles, directly supporting product reliability.
- Supplier-Client Communication: Provides a standardized language for describing microstructure, aiding negotiations and technical discussions between manufacturers and end-users.
- Research and Development: Supports metallurgical research by offering reliable benchmarks for microstructural analysis, contributing to the development of improved bearing materials.
- Failure Analysis: Helps in diagnosing service failures or performance issues related to steel microstructure by referencing agreed microstructural categories.
- Training and Education: Offers a visual and systematic foundation for training personnel in metallographic techniques and microstructural evaluation.
Value for Professionals
The use of this standard helps organizations:
- Achieve more accurate and reproducible steel assessments
- Reduce misunderstandings and disputes over material quality
- Enhance traceability and documentation in supply chains
- Support global trade by aligning with internationally recognized standardization principles
Related Standards
ASTM A892-09(2020) refers to several other important standards that support the procedures and best practices described:
- ASTM E3 - Guide for Preparation of Metallographic Specimens: Defines best practices for specimen preparation required for accurate microstructural analysis.
- ASTM E407 - Practice for Microetching Metals and Alloys: Details techniques for etching specimens to reveal microstructural features, including carbide morphology.
- ASTM E1245 - Practice for Determining the Inclusion or Second-Phase Constituent Content of Metals by Automatic Image Analysis: Provides guidelines for quantitative image analysis when counting carbide particles.
- ASTM Adjuncts (Photomicrographs for A892): A collection of reference photomicrographs used as rating benchmarks under this standard.
By integrating ASTM A892-09(2020) into metallurgical practice, organizations can align with industry best practices for microstructural rating of high carbon bearing steels, supporting quality, performance, and clear communication across the global steel industry.
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Frequently Asked Questions
ASTM A892-09(2020) is a guide published by ASTM International. Its full title is "Standard Guide for Defining and Rating the Microstructure of High Carbon Bearing Steels". This standard covers: ABSTRACT This guide covers the definition and rating of the microstructure of carbide structures in annealed high carbon bearing steels. Requirements for the optical metallograph apparatus and specimen preparation including polishing and etching are detailed. The description of the reference photomicrographs (graded illustrations of annealed carbides categorized by size, network, and lamellar content (shape)) that shall be used in the evaluation and the equation that shall define the rating are given. SCOPE 1.1 This guide covers the description of carbide structures in annealed high carbon bearing steels. 1.2 Included is a guide for rating steel specimens by a graded series of photomicrographs showing the incidence of certain conditions. 1.3 The reference photomicrographs are graded illustrations of annealed carbides categorized by size, network, and lamellar content (shape). 1.4 This guide is to facilitate communication and description of microstructure. It does not establish limits of acceptability. Such limits are a matter of agreement between user and producer. 1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.6 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 establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.7 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 guide covers the definition and rating of the microstructure of carbide structures in annealed high carbon bearing steels. Requirements for the optical metallograph apparatus and specimen preparation including polishing and etching are detailed. The description of the reference photomicrographs (graded illustrations of annealed carbides categorized by size, network, and lamellar content (shape)) that shall be used in the evaluation and the equation that shall define the rating are given. SCOPE 1.1 This guide covers the description of carbide structures in annealed high carbon bearing steels. 1.2 Included is a guide for rating steel specimens by a graded series of photomicrographs showing the incidence of certain conditions. 1.3 The reference photomicrographs are graded illustrations of annealed carbides categorized by size, network, and lamellar content (shape). 1.4 This guide is to facilitate communication and description of microstructure. It does not establish limits of acceptability. Such limits are a matter of agreement between user and producer. 1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.6 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 establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.7 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 A892-09(2020) is classified under the following ICS (International Classification for Standards) categories: 77.140.20 - Stainless steels. The ICS classification helps identify the subject area and facilitates finding related standards.
ASTM A892-09(2020) has the following relationships with other standards: It is inter standard links to ASTM A892-09(2014)e1, ASTM E407-23, ASTM E407-07(2015)e1, ASTM E1245-03(2008), ASTM E3-01(2007)e1, ASTM E3-01(2007), ASTM E407-07, ASTM E1245-03, ASTM E3-01, ASTM E3-95, ASTM E1245-00, ASTM E1245-95, ASTM E407-99, ASTM A295/A295M-14(2020). Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ASTM A892-09(2020) 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:A892 −09 (Reapproved 2020)
Standard Guide for
Defining and Rating the Microstructure of High Carbon
Bearing Steels
This standard is issued under the fixed designation A892; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope E407Practice for Microetching Metals and Alloys
E1245Practice for Determining the Inclusion or Second-
1.1 Thisguidecoversthedescriptionofcarbidestructuresin
Phase Constituent Content of Metals byAutomatic Image
annealed high carbon bearing steels.
Analysis
1.2 Included is a guide for rating steel specimens by a 3
2.2 ASTM Adjuncts:
graded series of photomicrographs showing the incidence of
Photomicrographs for Defining and Rating the Microstruc-
certain conditions.
ture of High Carbon Bearing Steels
1.3 The reference photomicrographs are graded illustrations
3. Apparatus
ofannealedcarbidescategorizedbysize,network,andlamellar
content (shape). 3.1 In order to adequately compare the structure of a
specimen with the photomicrographs, it will be necessary to
1.4 This guide is to facilitate communication and descrip-
view a properly prepared sample at 1000× magnification with
tion of microstructure. It does not establish limits of accept-
good resolution.
ability.Suchlimitsareamatterofagreementbetweenuserand
producer.
4. Specimen Preparation
1.5 The values stated in SI units are to be regarded as
4.1 Samples that represent a portion of the cross section of
standard. No other units of measurement are included in this
the material shall be prepared using the practices described in
standard.
Guide E3. The size of the sample shall be negotiated between
1.6 This standard does not purport to address all of the
the user and the producer. It may be a full cross section but
safety concerns, if any, associated with its use. It is the
should not be too large for practical handling in the polishing
responsibility of the user of this standard to establish appro-
operation.
priate safety, health, and environmental practices and deter-
4.2 The properly polished specimens shall be etched in a
mine the applicability of regulatory limitations prior to use.
suitable etchant which will clearly delineate the annealed
1.7 This international standard was developed in accor-
carbide structure of the material being examined as described
dance with internationally recognized principles on standard-
in Practice E407. Nital (2%) will frequently be an adequate
ization established in the Decision on Principles for the
etchant for routine examination. When critical or detailed
Development of International Standards, Guides and Recom-
analysis of structures is required, the recommended etchant is
mendations issued by the World Trade Organization Technical
Picral (saturated).
Barriers to Trade (TBT) Committee.
5. Description
2. Referenced Documents
5.1 The reference photomicrographs (available in ASTM
2.1 ASTM Standards:
Adjunct ADJA0892 ) are arranged into three categories, as
E3Guide for Preparation of Metallographic Specimens
follows:carbidesize(CS),carbidenetwork(CN),andlamellar
content (LC).
This guide is under the jurisdiction of Committee A01 on Steel, Stainless Steel 5.2 Six photomicrographs for each category are
...
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