Asme Section II a-2 Sa-592 Sa-592m | Heat Treating | Forging

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SA 592 2007
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  2007 SECTION II, PART A SA-592/SA-592M SPECIFICATION FOR HIGH-STRENGTH QUENCHEDAND TEMPERED LOW-ALLOY STEEL FORGEDFITTINGS AND PARTS FOR PRESSURE VESSELS SA-592/SA-592M [Identical with ASTM Specification A 592/A 592M-89 (R94)   1 .] 1. Scope1.1  This specification covers high-strength quenchedand tempered low-alloy steel forged fittings and parts forpressurevessels.Themaximumthicknessofforgingsunderthis specification shall be 1 1  ⁄  2  in. [38 mm] for Grade A,and 3 3  ⁄  4  in. [95 mm] for Grades E and F  ( 4 in. [102 mm]maximum as heat treated ) . NOTE—ThesegradesaresimilartocorrespondinggradesinSpecificationA 517/A 517M. 1.2  Welding technique is of fundamental importanceand it is presupposed that welding procedures will be inaccordance with approved methods for the class of mate-rial used. 1.3  The values stated in either inch-pound units or SI[metric] units are to be regarded separately as the standard;within the text and tables, the SI units are shown in [brack-ets]. The values stated in each system are not exact equiva-lents; therefore, each system must be used independentlyof the other. Combining values from the two systems mayresult in nonconformance with the specification. 1.4  Unless the order specifiesthe applicable “M” speci-fication designation, the material shall be furnished to theinch-pound units. 2. Referenced Documents2.1  ASTM Standards: A 370 Test Methods and Definitions for Mechanical Test-ing of Steel ProductsA 517/A 517M Specification for Pressure Vessel Plates,Alloy Steel, High-Strength, Quenched and TemperedA 788 Specification for Steel Forgings, General Require-mentsE 112 Methods for Determining the Average Grain Size 1143 3. Ordering Information and GeneralRequirements3.1  In addition to the ordering information required bySpecification A 788, the purchaser shall include with theinquiry and order a detailed drawing, a sketch, or writtendescription of the forging. 3.2  Materialsuppliedtothisspecificationshallconformto the requirements of Specification A 788, which outlinesadditional ordering information, manufacturing require-ments,testing andretesting methodsand procedures,mark-ing, certification, product analysis variations, andadditional supplementary requirements. 3.3  If the requirements of this specification are in con-flict with the requirements of Specification A 788, therequirements of this specification shall prevail. 4. Materials and Manufacture4.1  MeltingProcess —   The steel shall bemadein accor-dance with the Melting Process Section of SpecificationA 788. 4.2  Grain Size —   The steel shall be fully killed, finegrained  ( ASTM No. 5 or finer ) , as determined in accor-dance with Test Methods E 112, Plate IV. 4.3  Discard —   Sufficient discard shall be made fromeach ingot to ensure freedom from piping and excessivesegregation. 4.4  The finished product shall be a hot-worked forgingas defined by Specification A 788, and shall be forged asclosely as practicable to the finished shape and size. 5. Heat Treatment5.1  After forging and before reheating, the forgingsshall be cooled to provide substantially complete transfor-mation of austenite. Heat treatment for properties shall Copyright ASME International Provided by IHS under license with ASME Licensee=Occidental Chemical Corp New sub account/5910419101 Not for Resale, 08/13/2007 15:37:06 MDT No reproduction or networking permitted without license from IHS --``,`,,```,``,,`,`,``,`,```,,,-`-`,,`,,`,`,,`---  SA-592/SA-592M 2007 SECTION II, PART A consist of heating the forgings to not less than 1650°F[900°C], quenching in a liquid medium, and tempering at1150°F [620°C] minimum, with a holding time of 1 h/in.[1 h ⁄ 25 mm] minimum, but in no case less than  1  ⁄  2  h.Forgings with sections over 2 1  ⁄  2  to 4 in. [65 to 100 mm]inclusive, shall be liquid quenched from a temperature notless than 1750°F [955°C] prior to the above treatment forproperties. 6. Chemical Requirements6.1  Heat Analysis —   The heat analysis obtained fromsampling in accordance with Specification A 788 shallcomply with Table 1. 6.2  Product Analysis —   The purchaser may use theproduct analysis provision of Specification A 788 to obtaina product analysis from a forging representing each heator multiple heat. 7. Mechanical Requirements7.1  The forgings as represented by tension tests shallconform to the requirements prescribed in Table 2. CharpyV-notch impact specimens shall have a lateral expansionopposite the notch of not less than 0.015 in.  ( 15 mils ) [0.38 mm]. In addition, the values of energy absorptionin foot-pounds  ( or joules )  and the fracture appearance inpercent shear shall be recorded and reported for infor-mation. 7.2  Sampling: 7.2.1  Samplesfor mechanical test specimensshall beremoved after the quenching and tempering heat treatment.The purchaser shall specify any additional thermal treat-ments that shall be given to the test specimens in additionto the heat treatment specified in 5.1.  ( This is intended tosimulate thermal treatments which may subsequently beperformed by the fabricator. ) 7.2.2  Samplesshall beremoved so that thetest speci-mens will have their major axes parallel to the directionof major working of the forging. 7.2.3  Test specimens may be machined from a pro-duction forging, or prolongation thereof, or from specialforged blocks suitably worked and heat treated with theproduction forgings. Such special blocks shall be obtainedfrom the ingot, slab, or billet and be reduced by forgingin a manner similar to that for the products to be repre-sented. The maximum reduction for a special test block shall not exceed the minimum reduction of the forgingsrepresented, and its thickness shall not be less than themaximum thickness of the forgings represented. If a forg-ing is tested, the tests must represent the maximum sectionthickness in the lot. All test specimens shall be located atthe mid-plane of the thickness and at least T   from any 1144 second surface of the production forging or test block.  ( T  equals the maximum thickness of the forging. ) 7.3  Number of Tests and Retests: 7.3.1  Number of Tests: 7.3.1.1  Oneroom-temperaturetensiontestandoneset of three Charpy V-notch specimens shall be made torepresent the maximum section from each heat in eachheat-treatment charge. Impact tests shall be conducted atthe temperature specified on the order, but no higher than32°F [0°C]. 7.3.1.2  One grain size test shall be made fromeach heat. 7.3.2  Retests of Tension Specimens —   If the results of tension tests do not conform to the requirements specified,retests are permitted, as outlined in 7.3.2.1, 7.3.2.2, and7.3.2.3. 7.3.2.1  If the percentage of elongation of a tensiontest specimen is less than that prescribed in Table 2, andanypartofthefractureisoutsidethemiddlehalfofthegagelength, indicated by scribe marks on the test specimens, asingle retest shall be allowed. 7.3.2.2  If a test specimen fails to meet the mini-mum specified requirements due to a flaw, other than arupture, crack, or flake, a single retest shall be allowed. 7.3.2.3  In the case of failure of the mechanicaltest specimens to conform to the minimum specifiedrequirements, the manufacturer may reheat treat the forg-ings. Testing after reheat treatment shall consist of the fullnumber of specimens taken from locations complying withthe specification or order. 7.3.3  Retests of Impact Specimens: 7.3.3.1  If thelateralexpansion valuefor onespeci-men is below 0.015 in. [0.38 mm] but not below 0.010 in.[0.25 mm] and the average equals or exceeds 0.015 in.[0.38 mm], a retest of three additional specimens may bemade. Each of the three retest specimens must equal orexceed the specified minimum value of 0.015 in.[0.38 mm]. 7.3.3.2  If the required lateral expansion values arenot obtained in the retest, or if the values in the initial testare below the required values for retest, no further retestsare permitted unless the forgings are reheat treated. Afterreheat treatment, a set of three specimens shall be testedand each must equal or exceed the specified minimumvalue of 0.015 in. [0.38 mm]. 7.4  Test Methods —   Tension and impact tests shall bemade in accordance with the latest issue of Test Methodsand Definitions A 370. Tension specimens shall be thestandard 0.500-in. [12.5-mm] round by 2-in. [50-mm] gagelength [see Fig. 5 {Suggested Types of Ends for Standard Copyright ASME International Provided by IHS under license with ASME Licensee=Occidental Chemical Corp New sub account/5910419101 Not for Resale, 08/13/2007 15:37:06 MDT No reproduction or networking permitted without license from IHS --``,`,,```,``,,`,`,``,`,```,,,-`-`,,`,,`,`,,`---  2007 SECTION II, PART A SA-592/SA-592M Round Tension Test Specimens), Test Methods and Defi-nitions A 370]. In case of sections too small to accommo-date this standard specimen, the largest practicable smallsize specimen shown in Fig. 4 shall be used. The impactspecimens shall be the Charpy V-notch, as shown in Fig.10 (Charpy (Simple-Beam) Impact Test) of Test Methodsand Definitions A 370. 8. Repair Welding8.1  Repair welding of forgings may be permitted butonly at the option of the purchaser. Such repair welds shallbe made in accordance with Section IX of the ASMEBoiler and Pressure Vessel Code. 1145 9. Product Marking9.1  Each forging shall be identified in accordance withthe Marking Section of Specification A 788. 10. Test Reports10.1  The certification requirements of SpecificationA 788 shall apply. 11. Keywords11.1  high-strength low-alloy steel; pipe fittings—steel;pressure vessel service; quenched and tempered steel; steelforgings—alloy Copyright ASME International Provided by IHS under license with ASME Licensee=Occidental Chemical Corp New sub account/5910419101 Not for Resale, 08/13/2007 15:37:06 MDT No reproduction or networking permitted without license from IHS  SA-592/SA-592M 2007 SECTION II, PART A TABLE 1CHEMICAL REQUIREMENTS Composition, %Element Grade A A Grade E A Grade F A CarbonHeat 0.15–0.21 0.12–0.20 0.10–0.20Product 0.13–0.23 0.10–0.22 0.08–0.22ManganeseHeat 0.80–1.10 0.40–0.70 0.60–1.00Product 0.75–1.15 0.37–0.74 0.55–1.05Phosphorus, max .025 .025 .025Sulfur, max .025 .025 .025SiliconHeat 0.40–0.80 0.20–0.35 0.15–0.35Product 0.35–0.86 0.18–0.37 0.13–0.37NickelHeat . . . . . . 0.70–1.00Product . . . . . . 0.67–1.03ChromiumHeat 0.50–0.80 1.40–2.00 0.40–0.65Product 0.46–0.84 1.34–2.06 0.36–0.79MolybdenumHeat 0.18–0.28 0.40–0.60 0.40–0.60Product 0.15–0.31 0.36–0.64 0.36–0.64VanadiumHeat . . .  B  0.03–0.08Product . . . . . . 0.02–0.09TitaniumHeat . . . 0.04–0.10 . . .Product . . . 0.03–0.11 . . .ZirconiumHeat 0.05–0.15 . . . . . .Product 0.04–0.16 . . . . . .CopperHeat . . . 0.20–0.40 0.15–0.50Product . . . 0.17–0.43 0.12–0.53Boron 0.0025 max 0.0015–0.005 0.002–0.006 A Similar to Specification A 517/A 517M Grades A, E, and F, respectively. B  May be substituted for part or all of titanium content on a one for one basis. TABLE 2TENSILE REQUIREMENTS Over 2 1  /  2  in. to 4 in.Up to 2 1  /  2  in. [65 to 100 mm],[65 mm], incl incl Tensile strength, psi (MPa) 115 000 to 135 000 105 000 to 135 000[795 to 930] [725 to 930]Yield strength (0.2% offset), min, 100 000 [690] 90 000 [620]psi [MPa]Elongationin2in.[50mm],min,% 18 17Reduction of area, min, % 45 40 1146 Copyright ASME International Provided by IHS under license with ASME Licensee=Occidental Chemical Corp New sub account/5910419101 Not for Resale, 08/13/2007 15:37:06 MDT No reproduction or networking permitted without license from IHS --` `   ,`   ,  ,` ` `   ,` `   ,  ,`   ,`   ,` `   ,`   ,` ` `   ,  ,  ,-` -`   ,  ,`   ,  ,`   ,`   ,  ,` ---
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