ASTM A295-14(R2020) pdf free download

ASTM A295-14(R2020) pdf free download.Standard Specification for High-Carbon Anti-Friction Bearing Steel
6. Sizes, Shapes, and Dimensional Tolerances
6.1 The physical size and shape of the material shall be agreed upon between manufacturer and purchaser. 6.2 Dimensional tolerances for hot-rolled or hot-rolled and annealed bars, in straight lengths or coils, and cold-finished bars 0.500 in. [12.5 mm] and larger in diameter furnished under this specification shall conform to the requirements specified in the latest edition of Specification A29/A29M. 6.3 Dimensional tolerances for cold-finished coils for ball and roller material shall be as shown in Table 2. 6.4 Coil tolerances also apply to cold-finished straight lengths under 0.500 in. [12.5 mm] in diameter.
7. Quality Tests
7.1 The supplier shall be held responsible for the quality of the material furnished and shall make the necessary tests to ensure this quality. The supplier shall be required to report results of the micro-inclusion rating tests detailed below. Quality tests shown in 7.2 and 7.3 are based upon procedures established in Test Methods E45. 7.2 Sampling—Samples taken in accordance with the fol- lowing paragraphs shall be obtained from 4 in. by 4 in. [100 mm by 100 mm] rolled billets or forged sections. Tests may be made on smaller or larger sections by agreement between manufacturer and purchaser. A minimum 3 to 1 reduction of rolled billets or forged sections is required for strand cast products. 7.2.1 For top poured products, a minimum of six samples representing the top and bottom of the first, middle, and last usable ingots shall be examined. 7.2.2 For bottom poured products, a minimum of six samples shall be examined and they shall represent the top and bottom of three ingots. One ingot shall be taken at random from the first usable plate poured, one ingot, at random, from the usable plate poured nearest to the middle of the heat, and one ingot, at random, from the last usable plate poured. When two usable plates constitute a heat, two of the sample ingots shall be selected from the second usable plate poured. 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. 7.2.3 For strand cast products, a minimum of six samples representing the first, middle, and last portion of the heat cast shall be examined. At least one sample shall be taken from each strand. 7.3 Inclusion Rating—The specimens shall be 3 ⁄ 8 in. by 3 ⁄ 4 in. [10 mm by 20 mm] and shall be taken from an area halfway between the center and outside of the billet. The polished face shall be longitudinal to the direction of rolling. The scale used for rating the specimens shall be the Jernkontoret chart described in Test Methods E45, Plate I-A. Fields with sizes or numbers of all types of inclusions intermediate between configurations shown on the chart shall be classified as the lesser of the rating number. The worst field of each inclusion type from each specimen shall be recorded as the rating for the specimen. Two thirds of all specimens and at least one from each ingot tested, or from the first, middle, and last portion of the strands tested, as well as the average ofall specimens, shall not exceed the rating specified in Table 3. If specifically ordered and certified to Supplementary Requirement S4, Type A inclusion ratings shall not exceed 3.0 thin and 2.0 heavy. See S4.1.
8. Grain Size
8.1 The steels covered by this specification shall have the capability of showing a fine fracture grain size (approximately ASTM No. 8 in accordance with Test Methods E112) when quenched from normal austenitizing temperatures not exceed- ing 1550 °F [840 °C].
9. Decarburization and Surface Imperfections
9.1 Decarburization and surface imperfections shall not exceed the limits specified in Tables 4 and 5. Decarburization shall be measured using the microscopical methods described in Test Methods E1077.