ASTM A485-03

Standard Specification for High Hardenability Antifriction Bearing Steel

ABSTRACT
This specification covers high hardenability modifications of high-carbon bearing quality steel to be used in the manufacture of antifriction bearings. The grades of steels covered here are: Grade 1, Grade 2, Grade 3, Grade 4, Grade B2, Grade B3, Grade B4, Grade B5, Grade B6, Grade B7, and Grade B8. Heat and product analyses shall be performed wherein specimens shall conform to required chemical composition of carbon, manganese, phosphorus, sulfur, silicon, chromium, nickel, titanium, copper, molybdenum, oxygen, and aluminum. The steels shall undergo normalizing followed by spheroidize annealing before heating for end quenching. Test for hardenability shall be performed wherein specimens shall conform to required Brinell and Rockwell hardness.
SCOPE
1.1 This specification covers high hardenability modifications of high-carbon bearing quality steel to be used in the manufacture of antifriction 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 inch-pound units are to be regarded as the standard.

General Information

• Status: Historical
• Publication Date: 09-Apr-2003
• 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 A485-00 - Standard Specification for High Hardenability Antifriction Bearing Steel
• Effective Date: 10-Apr-2003
• Replaced By: ASTM A485-09 - Standard Specification for High Hardenability Antifriction Bearing Steel
• Effective Date: 01-Oct-2009

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: A485 – 03
Standard Specification for
1
High Hardenability Antifriction Bearing Steel
This standard is issued under the fixed designation A485; 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.
7
1. Scope ISO 683 Part 17: Ball and Roller Bearing Steels
1.1 This specification covers high hardenability modifica-
3. Ordering Information
tions of high-carbon bearing quality steel to be used in the
3.1 Orders for material under this specification should
manufacture of antifriction bearings.
include the following information:
1.2 Supplementary requirements of an optional nature are
3.1.1 Quantity (weight or number of pieces),
provided and when desired shall be so stated in the order.
3.1.2 Grade identification,
1.3 The values stated in inch-pound units are to be regarded
3.1.3 ASTM designation and year of issue,
as the standard.
3.1.4 Dimensions,
2. Referenced Documents 3.1.5 Supplementary requirements, if included.
2
2.1 ASTM Standards:
4. Process
A29/A29M Specification for Steel Bars, Carbon and Alloy,
2
4.1 The steel shall be made by a process that is capable of
Hot-Wrought, General Requirements for
providing a high quality product meeting the requirements of
A255 Test Methods for Determining Hardenability of Steel
3
this specification.
A751 Test Methods, Practices, andTerminology for Chemi-
5. Chemical Composition and Analysis
4
cal Analysis of Steel Products
5.1 Typical examples of chemical compositions are shown
E45 Test Methods for Determining the Inclusion Content of
4 in Table 1. Other compositions may be specified.
Steel
5.2 An analysis of each heat of steel shall be made by the
E381 Method of Macroetch Testing Steel Bars, Billets,
5 steel manufacturer in accordance withTest Methods, Practices,
Blooms, and Forgings
and Terminology A751. The chemical composition thus deter-
E1019 Test Methods for Determination of Carbon, Sulfur,
mined shall conform to the requirements specified in Table 1
Nitrogen, and Oxygen in Steel, Iron, Nickel, and Cobalt
for the ordered grade or to other requirements agreed upon
4
Alloys by Various Combustion and Fusion Techniques
between manufacturer and purchaser.
E1077 Test Methods for Estimating the Depth of Decarbur-
5.3 Product analysis may be made by the purchaser in
ization of Steel Specimens
accordance with Test Methods, Practice, and Terminology
2.2 Other Standards:
A751. Permissible variations in product analysis shall be in
6
SAE J148a Grain Size Determination of Steel
accordance with Specification A29/A29M.
6. Sizes, Shapes, and Dimensional Tolerances
6.1 The physical size and shape of the material shall be
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
agreed upon between manufacturer and purchaser.
Stainless Steel and RelatedAlloys , and is the direct responsibility of Subcommittee
A01.28 on Bearing Steels. 6.2 Dimensional tolerances for hot-rolled or hot-rolled and
Current edition approved April 10, 2003. Published July 2003. Originally
annealed bars, in straight lengths or coils, and cold-finished
approved in 1963. Last previous edition approved in 2000 as A485–00. DOI:
bars furnished under this specification shall conform to the
10.1520/A0485-03.
2
requirements specified in the latest edition of Specification
Annual Book of ASTM Standards, Vol 01.05.
3
Annual Book of ASTM Standards, Vol 01.03.
A29/A29M.
4
Annual Book of ASTM Standards, Vol 03.01.
5
Annual Book of ASTM Standards, Vol 03.06.
6 7
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A485 – 03
A,B
TABLE 1 Chemical Composition
C D
Number Name C Mn P (max) S (max) Si Cr Ni (max) Ti (max) Cu (max) Mo O (max) Al (max)
1 Grade 1 0.90–1.05 0.90–1.20 0.025 0.015 0.45–0.75 0.90–1.20 0.25 0.0050 0.30 0.10 (max) 0.0015 0.050
2 Grade 2 0.85–1.00 1.40–1.70 0.025 0.015 0.50–0.80 1.40–1.80 0.25 0.0050 0.30 0.10 (max) 0.0015 0.050
3 Grade 3 0.95–1.10 0.65–0.90 0.025 0.015 0.15–0.35 1.10–1.50 0.25 0.0050 0.30 0.20–0.30 0.0015 0.050
4 Grade 4 0.95–1.10 1.05–1.35 0.025 0.015 0.15–0.35 1.10–1.50 0.25 0.0050 0.30 0.45–0.60 0.0015 0.050
E
B2 100CrMnSi4–4 0.93–1.05 0.90–1.20 0.025 0.015 0.45–0.75 0.90–1.20 .
...