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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Chemical Composition and Analysis 5. Special requirements agreed to at the time of purchase shall be noted on the certi? A number in parentheses indicates the year of last reapproval. When two usable plates constitute a heat, two of the sample ingots shall be selected from the second usable plate poured. 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 atsm.
Tests may be made on smaller or larger sections by agreement between manufacturer and purchaser. When so included, a supplementary requirement shall have the same force as if it were in the body of the wstm A superscript epsilon e indicates an editorial change since the last revision or reapproval.
Sizes, Astk, and Dimensional Tolerances 6. Fields with sizes or numbers of all types of inclusions intermediate between con? Historical Version s – view previous versions of standard. Sample Reduction Ratio S5. The values stated in ast, system may not be exact equivalents; therefore, each system shall be used independently of the other.
ASTM A, High-Carbon Anti-Friction Bearing Steel – Special Steel
Other compositions may be speci? Quality tests shown in 7. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
Magnetic Particle Method S3. The scale used for rating the specimens shall be the Jernkontoret chart described in Practice E 45, Plate I-r.
Qstm sum of all lengths for each specimen shall be determined and expressed as total length per area inspected. Combining values from the two systems may result in non-conformance with the standard. Steels shall exhibit fine fracture grain size when quenched from normal austenitizing temperatures. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every?
Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
Two thirds of all specimens and at least one from each ingot tested, or from the? The polished face shall be longitudinal to the direction of rolling. a2955
ASTM A295, High-Carbon Bearing Steel
Originally published as A — 46 T. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. It is informational only and not an official asym of the standard; the full text of the standard itself must be referred to for its use and application. A — 98 Standard Speci? Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
This specification covers high-carbon bearing-quality steel to be used in the manufacture of anti-friction bearings. Current edition approved Dec. Results are commonly expressed in millimeters per square metre. At least one sample shall be taken from each strand. When annealing is specified in the order, the steel shall adhere to hardness z295 and have a completely spheroidized microstructure, which shall accordingly be rated and reported as carbide size, carbide network, and lamellar content.
Permissible variations in product analysis shall be in accordance with Speci? Sulfur Requirement for Machinability S4.
The chemical composition thus determined shall conform to the requirements speci? Where a single usable plate constitutes a heat, any three random ingots may be selected. Other methods of sampling shall be as agreed upon between manufacturer and purchaser.
ASTM A295 Grade 52100 annealed, cold-drawn (stress-relieved) Coils
Lamellar content of other compositions shall be as agreed upon between manufacturer and purchaser. This abstract is a brief summary of the referenced standard. Last previous edition A — ASTM International takes no position respecting ast, validity of any patent rights asserted in connection with any item mentioned in this standard.
Decarburization shall be measured using the microscopical methods described in Test Method E 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.