ASTM A295/A295M-05
(Specification)Standard Specification for High-Carbon Anti-Friction Bearing Steel
Standard Specification for High-Carbon Anti-Friction Bearing Steel
ABSTRACT
This specification covers high-carbon bearing-quality steel to be used in the manufacture of anti-friction bearings. Materials shall conform to chemical compositions as specified herein, and to physical size and shape as agreed upon between the manufacturer and purchaser. Steels shall exhibit fine fracture grain size when quenched from normal austenitizing temperatures. Decarburization and surface imperfections shall not exceed the limits also specified herein. When annealing is specified in the order, the steel shall adhere to hardness requirements and have a completely spheroidized microstructure, which shall accordingly be rated and reported as carbide size, carbide network, and lamellar content.
SCOPE
1.1 This specification covers high-carbon bearing-quality steel to be used in the manufacture of anti-friction bearings.
1.2 Supplementary requirements of an optional nature are provided and when desired shall be so stated in the order.
1.3 The values stated in either inch-pound units or SI units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.
General Information
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Standards Content (Sample)
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Designation: A295/A295M – 05
Standard Specification for
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High-Carbon Anti-Friction Bearing Steel
This standard is issued under the fixed designationA295/A295M; 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 Department of Defense.
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1. Scope* ISO 683, Part 17 Ball and Roller Bearing Steels
1.1 This specification covers high-carbon bearing-quality
3. Ordering Information
steel to be used in the manufacture of anti-friction bearings.
3.1 Orders for material under this specification should
1.2 Supplementary requirements of an optional nature are
include the following information:
provided and when desired shall be so stated in the order.
3.1.1 Quantity,
1.3 The values stated in either inch-pound units or SI units
3.1.2 Grade identification,
are to be regarded separately as standard. The values stated in
3.1.3 Specification designation and year of issue,
each system may not be exact equivalents; therefore, each
3.1.4 Dimensions, and
system shall be used independently of the other.
3.1.5 Supplementary requirements, if included.
2. Referenced Documents
4. Process
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2.1 ASTM Standards:
4.1 The steel shall be made by a process that is capable of
A29/A29M Specification for Steel Bars, Carbon and Alloy,
providing a high quality product meeting the requirements of
Hot-Wrought, General Requirements for
this specification.
A370 Test Methods and Definitions for Mechanical Testing
of Steel Products
5. Chemical Composition and Analysis
A751 Test Methods, Practices, andTerminology for Chemi-
5.1 Typical examples of chemical compositions are shown
cal Analysis of Steel Products
in Table 1. Other compositions may be specified.
A892 Guide for Defining and Rating the Microstructure of
5.2 An analysis of each heat of steel shall be made by the
High Carbon Bearing Steels
steel manufacturer in accordance withTest MethodsA751.The
E45 Test Methods for Determining the Inclusion Content of
chemical composition thus determined shall conform to the
Steel
requirements specified in Table 1 for the ordered grade or to
E112 Test Methods for Determining Average Grain Size
other requirements agreed upon between manufacturer and
E381 Method of Macroetch Testing Steel Bars, Billets,
purchaser.
Blooms, and Forgings
5.3 Product analysis may be made by the purchaser in
E1019 Test Methods for Determination of Carbon, Sulfur,
accordance with Test MethodsA751. Permissible variations in
Nitrogen, and Oxygen in Steel, Iron, Nickel, and Cobalt
product analysis shall be in accordance with Specification
Alloys by Various Combustion and Fusion Techniques
A29/A29M.
E1077 Test Methods for Estimating the Depth of Decarbur-
ization of Steel Specimens
6. Sizes, Shapes, and Dimensional Tolerances
2.2 Other Document:
6.1 The physical size and shape of the material shall be
agreed upon between manufacturer and purchaser.
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This specification is under the jurisdiction of ASTM Committee A01 on Steel,
6.2 Dimensional tolerances for hot-rolled or hot-rolled and
Stainless Steel and RelatedAlloys, and is the direct responsibility of Subcommittee
annealed bars, in straight lengths or coils, and cold-finished
A01.28 on Bearing Steels.
bars0.500in.[12.5mm]andlargerindiameterfurnishedunder
Current edition approved March 1, 2005. Published April 2005. Originally
thisspecificationshallconformtotherequirementsspecifiedin
approved in 1946. Last previous edition approved in 1998 as A295 – 98. DOI:
10.1520/A0295_A0295M-05.
the latest edition of Specification A29/A29M.
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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
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Standards volume information, refer to the standard’s Document Summary page on Available from International Organization for Standardization (ISO), 1 rue de
the ASTM website. Varembé, Case postale 56, CH-1211, Geneva 20, Switzerland.
*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.
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A295/A295M – 05
A,B
TABLE 1 Composition
C D
Name C Mn P (max) S (max) Si Cr Ni (max) Mo Cu (max) O (max) Al (max)
E
52100 0.93-1.05 0.25-0.45 0.025 0.015 0.15-0.35 1.35-1.60 0.25 0.10 (max) 0.30 0.0015 0.050
5195 0.90-1.03 0.75-1.00 0.025 0.015 0.15-0.35 0.70-0.90 0.25 0.10 (max) 0.30 0.0015 0.050
5090M 0.89-1.01 0.50-0.80 0.025 0.015 0.15-0.35 0.40-0.60 0.25 0.08-0.15 0.30 0.0015 0.050
1070M 0.65-0.75 0.80-1.10 0.025 0.015 0.15-0.35 0.20 (max) 0.
...
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