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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ASTM A 高碳耐磨轴承钢技术规范_百度文库

Chemical Composition and Analysis 5. Decarburization and surface imperfections a2295 not exceed the limits also specified herein. The polished face shall be longitudinal to the direction of rolling. Other methods of sampling shall be as agreed upon between manufacturer and purchaser. 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.

This standard has wstm approved for use by agencies of the Department of Defense. Special requirements agreed to at the time of purchase shall be noted on the certi?

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

Fields with sizes or numbers of all types of inclusions intermediate between con? Link to Active This link will always route to the current Active version of the standard. Steels shall exhibit fine fracture grain size when quenched from normal austenitizing temperatures.

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. Originally published as A — 46 T. 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.

  ASTM D4220 PDF

This specification covers high-carbon bearing-quality steel to be used in the manufacture of anti-friction bearings. Two thirds of all specimens and at least one from each ingot tested, or from the? Current edition approved Dec. Decarburization shall be measured using the microscopical methods described in Test Method E A number in parentheses indicates the year of last reapproval.

Other compositions may be speci? Tests may be made on smaller or larger sections by agreement between manufacturer and purchaser. A — 98 Standard Speci? Intentional additions of calcium or calcium alloys for deoxidation or inclusion shape control are not permitted unless speci?

Where a single usable plate constitutes a heat, any three random ingots may be selected. All tests and inspections shall be made at the place of manufacture, unless otherwise agreed to. Permissible variations in product analysis shall be in accordance with Speci? ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.

One ingot shall be taken at random from the? Materials shall conform to chemical compositions as specified herein, and to physical size and shape as agreed upon between the manufacturer and purchaser. Historical Version s – view previous versions of standard.


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

A minimum 3 to 1 reduction of rolled billets or forged sections is required for strand cast products. Combining values from the two systems may result in non-conformance with the standard. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Magnetic Particle Method S3. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.

At least one sample shall be taken from each strand. 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.

The supplier shall be required to report results a29 the macroetch and micro-inclusion rating tests detailed below.

Quality tests shown in 7. Sizes, Shapes, and Dimensional Tolerances 6. Sulfur Requirement for Machinability S4. Results are commonly expressed in millimeters per square metre. D Oxygen content applies to product analysis and shall be determined in accordance with Test Method Wstm The scale used for rating the specimens shall be the Jernkontoret chart described in Practice E 45, Plate I-r.