ASTM A892-88(2001)

Standard Guide for Defining and Rating the Microstructure of High Carbon Bearing Steels

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 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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 31-Dec-2000
• ICS: 77.140.20 - Stainless steels
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.28 - Bearing and Power Transmission Steels

Relations

• Replaces: ASTM A892-88(1995)e1 - Standard Guide for Defining and Rating the Microstructure of High Carbon Bearing Steels
• Effective Date: 01-Jan-2001
• Replaced By: ASTM A892-06 - Standard Guide for Defining and Rating the Microstructure of High Carbon Bearing Steels
• Effective Date: 01-Sep-2006
• Referred By: ASTM A295/A295M-14(2020) - Standard Specification for High-Carbon Anti-Friction Bearing Steel
• Effective Date: 01-Jan-2001

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: A 892 – 88 (Reapproved 2001)
Standard Guide for
Defining and Rating the Microstructure of High Carbon
Bearing Steels
This standard is issued under the fixed designation A 892; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 4.2 The properly polished specimens shall be etched in a
suitable etchant which will clearly delineate the annealed
1.1 Thisguidecoversthedescriptionofcarbidestructuresin
carbide structure of the material being examined as described
annealed high carbon bearing steels.
in Test Methods E 407. Nital (2 %) will frequently be an
1.2 Included is a guide for rating steel specimens by a
adequate etchant for routine examination. When critical or
graded series of photomicrographs showing the incidence of
detailed analysis of structures is required, the recommended
certain conditions.
etchant is Picral (saturated).
1.3 The reference photomicrographs are graded illustrations
of annealed carbides categorized by size, network and lamellar
5. Description
content (shape).
5.1 The reference photomicrographs are arranged into three
1.4 This guide is to facilitate communication and descrip-
categories as follows: carbide size (CS), carbide network (CN),
tion of microstructure. It does not establish limits of accept-
and lamellar content (LC).
ability. Such limits are a matter of agreement between user and
5.2 Six photomicrographs for each category are provided
producer.
and are identified by category and number, for example,
1.5 This standard does not purport to address all of the
CS1-CS6, CN1-CN6, and LC1-LC6 as shown in Figs. 1-3.
safety concerns, if any, associated with its use. It is the
Higher numbers indicate a larger number or greater degree of
responsibility of the user of this standard to establish appro-
severity of the category being rated.
priate safety and health practices and determine the applica-
5.2.1 Actual counted number of carbides per 400 µm
bility of regulatory limitations prior to use.
determined from the carbide size series of photomicrographs is
2. Referenced Documents as follows: (Reported counts are the average of three measure-
ments.)
2.1 ASTM Standards:
2 CS1 508
E3 Methods of Preparation of Metallographic Specimens
CS2 419
E 407 Practice for Microetching Metals and Alloys
CS3 324
3. Apparatus
CS4 234
CS5 165
3.1 In order to adequately compare the structure of a
CS6 115
specimen with the photomicrographs, it will be necessary to
view a properly prepared sample at 10003 magnification with
6. Procedure for Evaluation
good resolution.
6.1 Using an optical metallograph and a magnification of
4. Specime
...