ASTM A specification covers high-carbon bearing-quality steel to be used in the manufacture of anti-friction bearings. The most common. ASTM A 高碳耐磨轴承钢技术规范 – Designation: A – 98 Standard Speci?cation for High-Carbon Anti. ASTM A/AM Standard Specification for High-Carbon Anti-Friction Bearing Steel. standard by ASTM International, 10/01/ View all product details.

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The magnetic particle method measures bearing steel cleanliness by evaluating the total length of macro-inclusions for a stated area or per unit area. Other methods of sampling shall be as agreed upon between manufacturer and purchaser. Lamellar content of other compositions shall be as astn upon between manufacturer and purchaser.

Sample Reduction Ratio S5. A number in parentheses indicates the year of last reapproval. Decarburization and Surface Imperfections 9. This abstract is a brief summary of the referenced standard.

ASTM A / AM – 09 Standard Specification for High-Carbon Anti-Friction Bearing Steel

This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? Where a single usable plate constitutes a heat, any three random ingots may be selected.

When so included, a supplementary requirement shall have the same force as if it were in the body of the speci? Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. Last previous edition A — Decarburization shall be measured using the microscopical methods described in Test Method E Your comments will receive careful consideration at a meeting of the aztm technical committee, which you may attend.

ASTM A295, High-Carbon Bearing Steel

Combining values from the two systems may result in non-conformance with the standard. Link to Active This link will always route to the current Active version of the standard.

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The polished face shall be longitudinal to the direction of rolling.

Originally published as A — 46 T. Fields with sizes or numbers of all types of inclusions intermediate between con? Current edition approved Dec. The sum of all lengths for each specimen shall be determined and expressed as total length per area inspected. 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.

Other compositions may be speci? One ingot shall be taken at random from the? Results are commonly expressed in millimeters per square metre. The scale used for rating the specimens shall be the Jernkontoret chart described in Practice E 45, Plate I-r.

ASTM A295 Grade 52100 annealed, cold-drawn (stress-relieved) Coils

asrm Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Quality tests shown in 7. The supplier shall be required to report results of the macroetch and micro-inclusion rating tests detailed below. When annealing is specified in the order, the steel shall aetm to hardness requirements and have a completely spheroidized microstructure, which shall accordingly be rated and reported as carbide size, carbide network, and lamellar content.

Tests may be made on smaller or larger sections by agreement between manufacturer and purchaser. Decarburization and surface imperfections shall not exceed the limits also specified herein.

Atm superscript epsilon e indicates an editorial change since the last revision or reapproval. Steels shall exhibit fine fracture grain size when quenched from normal austenitizing temperatures.


A minimum 3 to 1 reduction of rolled billets or forged sections is required for strand cast products. Sizes, Shapes, and Dimensional Tolerances 6. Historical Version s – view previous versions of standard.

When two usable plates constitute a heat, two of the sample ingots shall be selected from the second usable plate poured. Permissible variations in product analysis shall be in accordance with Speci? Materials shall conform to chemical compositions as specified herein, and to physical size and shape as 2a95 upon between the manufacturer and purchaser. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown atm.

ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Chemical Composition and Analysis 5. A — 98 Standard Speci?

ASTM A, High-Carbon Anti-Friction Bearing Steel – Special Steel

At least one sample shall be taken from each strand. All tests and inspections shall be made at the place of manufacture, unless otherwise agreed to. Magnetic Particle Method S3. Intentional additions of calcium or calcium alloys for deoxidation or inclusion shape control are not permitted unless speci?

The chemical composition thus determined shall conform to the requirements speci? The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. This specification covers high-carbon bearing-quality steel to be used in the manufacture of anti-friction bearings.