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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Results are commonly expressed in millimeters per square metre. Materials shall conform to chemical compositions as specified herein, and to physical size and shape as agreed upon between the manufacturer and purchaser.
Special requirements agreed to at the time of purchase shall be noted on the certi? All tests and inspections shall be made at the place of manufacture, unless otherwise agreed to. When annealing is specified in the order, the steel shall adhere to hardness requirements and have a completely spheroidized a2955, which shall accordingly be rated and reported as carbide size, carbide network, and lamellar content.
A superscript epsilon e indicates an editorial change since the last revision astk reapproval. Decarburization and surface imperfections shall not exceed the limits also specified herein. The scale used for rating the specimens shall be the Jernkontoret chart a2995 in Practice E 45, Plate I-r.
Decarburization and Surface Imperfections 9. This specification covers high-carbon bearing-quality steel to be used in the manufacture of anti-friction bearings. One ingot shall be taken at random from the?
ASTM A / AM – 14 Standard Specification for High-Carbon Anti-Friction Bearing Steel
Lamellar content of other compositions shall be as agreed upon between manufacturer and purchaser. The chemical composition thus determined shall conform to the requirements speci?
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. Last previous edition A — 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.
Current edition approved Dec. Sample Reduction Ratio S5. When so included, a supplementary requirement shall have the same force as if it were in the body of the speci? Chemical Composition and Analysis 5.
Permissible variations in product analysis shall be in accordance with Speci? At least one sample shall be taken from each strand. A number in parentheses indicates the year of last reapproval. This standard has been approved for use by agencies of the Department of Defense. Where a single usable plate constitutes a heat, any three random ingots may be selected. Sulfur Requirement for Machinability S4. Other compositions may be speci?
ASTM A295 Grade 52100 annealed, cold-drawn (stress-relieved) Coils
A minimum 3 to 1 reduction of rolled billets or forged sections is required for strand cast products. If you a925 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.
The sum of all lengths for each specimen shall be determined and expressed as total length per area inspected. When two usable plates constitute a heat, two of the sample ingots shall be selected from the second usable plate poured.
Other methods of sampling shall be atsm agreed upon between manufacturer and purchaser. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM International takes no position respecting the validity of any patent rights asserted in connection with any asm mentioned in this standard. Decarburization shall be measured using the microscopical methods described in Test Method E Magnetic Particle Method S3. Fields with sizes or numbers of all types of inclusions intermediate between con?
The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Sizes, Shapes, and Dimensional Tolerances 6.
Intentional additions of a2295 or calcium alloys for deoxidation or inclusion shape control are not permitted unless speci? This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? Historical Version s x295 view previous versions of standard.
Quality tests shown in 7. Two thirds of all specimens and at least one from each ingot tested, or from the? The supplier shall be required to report results of the macroetch and micro-inclusion rating tests detailed below.
Tests may be made on smaller or larger sections by agreement between manufacturer and purchaser. Link to Active This link will always route to the current Active version of the standard.
Combining values from the two systems may result in non-conformance with the standard. A — 98 Standard Speci?
ASTM A 高碳耐磨轴承钢技术规范_百度文库
The polished face shall be longitudinal to the direction of rolling. Originally published as A — 46 T. ASTM does not give any warranty s295 or implied or make any representation that the contents of this abstract are accurate, complete or up to date.