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 scale used for rating the specimens shall be the Jernkontoret chart described in Practice E 45, Plate I-r. Decarburization and surface imperfections shall not exceed the limits also specified herein.
ASTM A295, High-Carbon Bearing Steel
The sum of all lengths for each specimen shall be determined and expressed as total length per area inspected. Other methods of sampling shall be as agreed upon between manufacturer and purchaser.
Intentional additions of calcium or calcium alloys for deoxidation or inclusion shape control are not permitted unless speci? A minimum 3 to 1 reduction of rolled billets or forged sections is required for strand cast products. Link to Active This link will always route to the current Active version of the standard. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. Sulfur Requirement for Machinability S4.
The polished face shall be longitudinal to the direction of rolling. When annealing is specified in the order, the steel shall adhere to hardness requirements and have a completely spheroidized microstructure, which shall accordingly be rated and reported as carbide size, carbide network, and lamellar content.
When so included, a supplementary requirement shall have the same force as if it were in the body of the speci?
It is informational x295 and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. Results are commonly expressed in millimeters per square metre. Decarburization and Surface Imperfections 9. Originally published as A — 46 T.
ASTM A – 98 Standard Specification for High-Carbon Anti-Friction Bearing Steel
This abstract is a brief summary of the referenced standard. Fields with sizes or numbers of all types of inclusions intermediate between con?
Tests may be made on smaller or larger sections by agreement between manufacturer and purchaser. Combining values from the two systems may result in non-conformance with the standard. D Oxygen content applies to product analysis and shall be determined in accordance with Test Method E When two usable plates constitute a heat, two of the sample ingots shall be selected from the second usable plate poured.
The chemical composition thus determined shall conform to the requirements speci? Sample Reduction Ratio S5. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.
This standard is subject to revision at any time by the responsible technical committee and must be reviewed every?
Last previous edition A — Sizes, Shapes, and Dimensional Tolerances 6. Current edition approved Dec. Special requirements agreed to at the time of purchase shall be noted on the certi? The supplier shall be required to report results of the macroetch and micro-inclusion rating tests detailed below.
ASTM A, High-Carbon Anti-Friction Bearing Steel – Special Steel
Quality tests shown in 7. Historical Version s – view previous versions of standard. Permissible variations in product analysis shall be in accordance with Speci? Asym number in parentheses indicates the year of last reapproval.
Steels shall exhibit fine fracture grain size when quenched from normal austenitizing temperatures. Two thirds of all specimens and at least one from each ingot tested, or from the? One ingot shall be taken at random from the? Where a single usable plate constitutes a heat, any three random ingots may be selected. Magnetic Particle Method S3. A superscript epsilon e indicates an editorial change since the last revision or reapproval. This standard has been approved for use by agencies of the Department of Defense.
Other zstm may be speci? At least one sample shall be taken from each strand. Lamellar content of other compositions shall be as agreed upon between manufacturer and purchaser.
ASTM A295 Grade 52100 annealed, cold-drawn (stress-relieved) Coils
A — 98 Standard Speci? 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 below. 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.
Chemical Composition and Analysis 5. The magnetic particle method measures bearing steel cleanliness by evaluating the total length of ast, for a stated area or per unit area. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.