Home>ASTM Standards>ASTM A541-05(R2020) pdf free download

ASTM A541-05(R2020) pdf free download

ASTM A541-05(R2020) pdf free download.Standard Specification for Quenched and Tempered Carbon and Alloy Steel Forgings for Pressure Vessel Components
4. Chemical Composition
4.1 Heat Analysis—The heat analysis obtained from sam- pling in accordance with Specification A788/A788M shall comply with Table 1 except that the additional features of Supplementary Requirements S8, S9, S10, S12, and S15 shall also apply as individually specified in the ordering information. 4.2 Product Analysis—The manufacturer shall use the prod- uct analysis provision of Specification A788/A788M to obtain a product analysis from a forging representing each heat or multiple heat. The permissible variations of Table 1 of Speci- fication A788/A788M do not apply to carbon, phosphorus, silicon, and sulphur for all classes, vanadium for Grade 1C, and columbium and calcium for Grades 22V and 3VCb. Boron is not subject to product analysis. The purchaser may also make this determination in accordance with Specification A788/ A788M.
5. Heat Treatment for Mechanical Properties
5.1 After complete austenitization, the forgings shall be quenched in a suitable liquid medium by spraying or immer- sion. For Grade 22V forgings, the minimum austenitizing temperature shall be 1650 °F [900 °C]. Quenching shall be followed by tempering at a subcritical temperature and holding at this temperature for a minimum time of 1 ⁄ 2 h/in. [25 mm] of maximum section thickness. Minimum tempering temperatures shall be:5.2 For Classes 1, 1A, 2, 2A, 3, or 3A, a multiple stage austenitizing procedure may be used whereby the forging is first fully austenitized and liquid quenched, followed by reheating within the intercritical temperature range to partially reaustenitize, and again liquid quenched. On completion of the austenitizing/quenching cycles, the forgings shall be tempered at a subcritical temperature as described in 5.1.
6. Mechanical Properties
6.1 General Requirements—The forgings shall conform to the requirements ofTable 2. The forgings shall also conform to the requirements of Table 3 unless either Supplementary Requirement S6 or S13 is specified, in which case the requirements of those sections shall apply. The largest obtain- able tension test specimen as specified in Fig. 4 of Test Methods and Definitions A370 shall be used. Impact speci- mens shall be Charpy V-notch, as shown in Fig. 10 of Test Methods and Definitions A370. The usage of subsize impact specimens due to material limitations must have prior pur- chaser approval. 6.2 Sampling—The longitudinal axis and mid-length of tension and impact test specimens shall be positioned in accordance with one of the following methods as specified by the purchaser: 6.2.1 Method 1—This method shall always be used when the maximum quenched thickness does not exceed 2 in. [50 mm]. Specimens shall be located in the production forging or test forging (as described in Method 4) at mid-thickness and at least 2 in. from other quenched surfaces.6.2.2 Method 2—t by 2t, where t is the distance from the area of significant loading (see 3.1) to the nearest quenched surface. However, the specimens shall not be nearer to one quenched surface than 3 ⁄ 4 in. [20 mm] and to the second quenched surface than 1 1 ⁄ 2 in. [40 mm]. When this method of testing is employed, forgings are usually manufactured in accordance with a purchaser-approved drawing showing pre- quenched dimensions and the location of mechanical test specimens.6.2.4 Method 4—Test specimens shall be taken from a representative separate test forging or bar made from the same heat of steel, which shall receive substantially the same reduction and type of hot working as the production forgings that it represents, except that a longitudinally forged bar may be used to represent a rolled ring of similar cross section. It shall be of the same nominal thickness as the as-quenched production forgings and shall be heat treated in the same furnace charge and under the same conditions as the production forgings. Test specimens shall be removed using the 1 ⁄ 4 T by T procedure referenced in Method 3 with the same limitation on forging thickness as in 6.2.3. This method shall be limited to forgings with a rough machined weight of not more than 1000 lb [450 kg]. 6.3 Metal Buffers—The required distances from quenched surfaces may be obtained with metal buffers instead of integral extensions. Buffer material may be carbon or low-alloy steel, and shall be joined to the forging with a partial penetration weld that seals the buffered surface. Specimens shall be located at least 1 ⁄ 2 in. [13 mm] from the buffered surface ofthe forging. Buffers shall be removed and the welded areas subjected to magnetic particle test to ensure freedom from cracks unless the welded areas are completely removed by subsequent machin- ing.

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