ASTM A866

This specification covers the standard specification for medium carbon bearing quality steel to be used in the manufacture of anti-friction bearings. The bearings shall conform to the required chemical composition for carbon, phosphorus, manganese, sulfur, silicon, chromium, molybdenum, vanadium, copper, oxygen and aluminum. Requirement for dimensional tolerances of hot-rolled or hot-rolled and annealed bars, in straight lengths or coils, and cold-finished bars and larger in diameter furnished shall conform to the specified size, shape and tolerances. The grain size of the material shall conform to the required size, otherwise it shall be normalized and retested. Decarburization and surface imperfection shall not exceed the limit in the specified values. Material may be ordered as hot rolled or thermally treated. No hardness limits shall apply for as-hot-rolled materials.

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.

1. Scope

1.1 This specification covers medium 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 inch-pound units are to be regarded as the standard.

2. Referenced Documents

ASTM Standards
A29/A29M Specification for Steel Bars, Carbon and Alloy, Hot-Wrought and Cold-Finished, General Requirements for
A751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products
E1019 Test Methods for Determination of Carbon, Sulfur, Nitrogen, Oxygen, and Hydrogen in Steel and in Iron, Nickel, and Cobalt Alloys
E1077 Test Method for Estimating the Depth of Decarburization of Steel Specimens
E112 Test Methods for Determining Average Grain Size
E381 Test Method for Macrotech Testing, Inspection and Rating Steel Products, Comprising Bars, Billets, Blooms, and Forgings
E45 Practice for Determining the Inclusion Content of Steel
ISO Standard
ISO683Part17: Ball and Roller Bearing Steels

Index Terms

anti-friction bearings; ball/roller bearings; carbon steel; medium-carbon anti-friction bearing steel; Number Code 77.140.10 (Heat-treatable steels)

Citing ASTM Standards

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