ASTM A1089/A1089M-14(2020)

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: A1089/A1089M −14 (Reapproved 2020)
Standard Specification for
Highly Loaded Anti-Friction Bearing Steel
This standard is issued under the fixed designation A1089/A1089M; 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 E2283 Practice for Extreme Value Analysis of Nonmetallic
Inclusions in Steel and Other Microstructural Features
1.1 This specification covers bars, billets, and blooms of
2.2 ISO Standard:
bearing-quality steel to be used in the manufacture of highly
ISO 4967 Steel–Determination of content of non-metallic
loaded anti-friction bearings.
inclusions–Micorgraphic method using standard diagrams
1.2 Supplementary requirements of an optional nature are
3. Ordering Information
provided and when desired shall be so stated in the order.
3.1 Orders for material under this specification should
1.3 The values stated in either SI units or inch-pound units
include the following information:
are to be regarded separately as standard. The values stated in
3.1.1 Quantity,
each system are not necessarily exact equivalents; therefore, to
3.1.2 Grade identification,
ensure conformance with the standard, each system shall be
3.1.3 Specification designation and year of issue,
used independently of the other, and values from the two
3.1.4 Dimensions, and
systems shall not be combined.
3.1.5 Supplementary requirements, if included.
1.4 This international standard was developed in accor-
dance with internationally recognized principles on standard-
4. Process
ization established in the Decision on Principles for the
4.1 The steel shall be made by a basic oxygen or electric
Development of International Standards, Guides and Recom-
furnace process, with vacuum degassing and suitable
mendations issued by the World Trade Organization Technical
shrouding, that provides a high quality product meeting the
Barriers to Trade (TBT) Committee.
requirements of this specification. The use of a vacuum-arc
remelt or an electro-slag remelt process is not required but is
2. Referenced Documents
not excluded.
2.1 ASTM Standards:
5. Chemical Composition and Analysis
A29/A29M SpecificationforGeneralRequirementsforSteel
Bars, Carbon and Alloy, Hot-Wrought
5.1 Thechemicalcompositionshallbeagreeduponbetween
A751 Test Methods, Practices, and Terminology for Chemi-
the manufacturer and purchaser.
cal Analysis of Steel Products
5.2 All compositions shall meet the element maximums of
E381 Method of Macroetch Testing Steel Bars, Billets,
Table 1.
Blooms, and Forgings
5.3 An analysis of each heat of steel shall be made by the
E588 Practice for Detection of Large Inclusions in Bearing
Quality Steel by the Ultrasonic Method steel manufacturer in accordance withTest Methods, Practices,
and Terminology A751. The chemical composition thus deter-
E1019 Test Methods for Determination of Carbon, Sulfur,
Nitrogen, and Oxygen in Steel, Iron, Nickel, and Cobalt mined shall conform to the requirements specified.
Alloys by Various Combustion and Inert Gas Fusion
5.4 Product analysis may be made by the purchaser in
Techniques
accordance with Test Methods, Practices, and Terminology
A751. Permissible variations in product analysis shall be in
accordance with Specification A29/A29M.
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
6. Sizes, Shapes, and Dimensional Tolerances
A01.28 on Bearing and Power Transmission Steels.
Current edition approved March 1, 2020. Published March 2020. Originally
6.1 The physical size and shape of the material shall be
approved in 2014. Last previous edition approved in 2014 as A1089/A1089M–14.
agreed upon between manufacturer and purchaser.
DOI: 10.1520/A1089_A1089M–14R20.
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 Available from International Organization for Standardization (ISO), ISO
Standards volume information, refer to the standard’s Document Summary page on Central Secretariat, BIBC II, Chemin de Blandonnet 8, CP 401, 1214 Vernier,
the ASTM website. Geneva, Switzerland, http://www.iso.org.
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A1089/A1089M − 14 (2020)
A, B
TABLE 1 Element Maximums
C D
Phosphorus Sulfur Oxygen Aluminum Copper Titanium Tin Arsenic Antimony Lead
0.015 0.015 See footnote 0.050 0.30 0.0050 0.030 0.040 0.020 0.002
A
Elements not agreed upon between the manufacturer and purchaser shall not be intentionally added to the steel.
B
Intentional additions of calcium or calcium alloys for deoxidation or inclusion shape control are not permitted unless specifically approved by the purchaser.
C
Oxygen content applies to product analysis and shall be determined in accordance with Test Methods E1019. A maximum average oxygen content of 0.0015 shall be
required for carburizing and induction hardening steels, and a maximum average content of 0.0010 shall be required for though hardening steels.
D
Total aluminum content.
6.2 Dimensional tolerances shall conform to the require- ferred to as Type A segregates) are not to be included in the
ments specified in Specification A29/A29M. For sizes and rating.Foringotcastmaterialonly,ifthesizeandweightofthe
shapes not covered by Specification A29/A29M, dimensional bars, billets, or blooms prevent the full cross section from
tolerances shall be agreed upon between manufacturer and being macroetched, an oversize quarter-section may be used as
purchaser. an alternative. The quarter-section must meet the reduction
requirement of 7.2 and contain both the surface and center of
7. Quality Tests
the original cross section before reduction.
7.1 The supplier shall be held responsible for the quality of
7.6 Inclusion Rating—The specimens shall be approxi-
the material furnished and shall make the necessary tests to
mately 10 mm by 20 mm and shall be taken from an area
ensure this quality. The supplier shall report results of the
halfway between the center and o
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