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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.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
Significance and Use
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 standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A29/A29M Specification for Steel Bars, Carbon and Alloy, Hot-Wrought, General Requirements for
A255 Test Methods for Determining Hardenability of Steel
A751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products
E45 Test Methods for Determining the Inclusion Content of Steel
E381 Method of Macroetch Testing Steel Bars, Billets, Blooms, and Forgings
E1019 Test Methods for Determination of Carbon, Sulfur, Nitrogen, and Oxygen in Steel, Iron, Nickel, and Cobalt Alloys by Various Combustion and Fusion Techniques
E1077 Test Methods for Estimating the Depth of Decarburization of Steel Specimens
Other StandardsISO683Part17: Ball and Roller Bearing Steels Available from the International Organization for Standardization (ISO), 1, rue de Varemb, Case postale 56, CH-1211, Genve 20, Switzerland.
ICS Number Code 77.140.20 (Steels of high quality)
UNSPSC Code 31171500(Bearings)