ASTM A488 A488M-2018 Standard Practice for Steel Castings Welding Qualifications of Procedures and Personnel.pdf

1、Designation: A488/A488M 18Standard Practice forSteel Castings, Welding, Qualifications of Procedures andPersonnel1This standard is issued under the fixed designation A488/A488M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the y

2、ear of last revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S. Department of Defense.1. Scope*1.1 This practice covers the

3、 qualification of procedures,welders, and operators for the fabrication and repair of steelcastings by electric arc welding.1.1.1 Qualifications of a procedure and either or both theoperator or welder under Section IX of the ASME Boiler andPressure Vessel Code shall automatically qualify the procedu

4、reand either or both the operator or welder under this practice.P-number designations in the ASME grouping of base metalsfor qualification may be different than the category numberslisted in Table 1. Refer to Appendix X1 for a comparison ofASTM category numbers with the corresponding ASMEP-number de

5、signations.1.2 Each manufacturer or contractor is responsible for thewelding done by his organization and shall conduct the testsrequired to qualify his welding procedures, welders, andoperators.1.3 Each manufacturer or contractor shall maintain a recordof welding procedure qualification tests (Fig.

6、 1), welder oroperator performance qualification tests (Fig. 2), and weldingprocedure specification (Fig. 3), which shall be made availableto the purchasers representative on request.1.4 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. The values sta

7、ted ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of the other. Combiningvalues from the two systems may result in nonconformancewith the standard.1.4.1 SI UnitsWithin the text, the SI units are shown inbrackets.1.5 This standard does not purport to ad

8、dress all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety, health, and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.6 This international standard was dev

9、eloped in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Do

10、cuments2.1 ASTM Standards:2A27/A27M Specification for Steel Castings, Carbon, forGeneral ApplicationA128/A128M Specification for Steel Castings, AusteniticManganeseA148/A148M Specification for Steel Castings, HighStrength, for Structural PurposesA216/A216M Specification for Steel Castings, Carbon, S

11、uit-able for Fusion Welding, for High-Temperature ServiceA217/A217M Specification for Steel Castings, MartensiticStainless and Alloy, for Pressure-Containing Parts, Suit-able for High-Temperature ServiceA297/A297M Specification for Steel Castings, Iron-Chromium and Iron-Chromium-Nickel, Heat Resista

12、nt,for General ApplicationA351/A351M Specification for Castings, Austenitic, forPressure-Containing PartsA352/A352M Specification for Steel Castings, Ferritic andMartensitic, for Pressure-Containing Parts, Suitable forLow-Temperature ServiceA356/A356M Specification for Steel Castings, Carbon, LowAll

13、oy, and Stainless Steel, Heavy-Walled for Steam Tur-binesA370 Test Methods and Definitions for Mechanical Testingof Steel Products1This practice is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.18 on Casti

14、ngs.Current edition approved July 1, 2018. Published July 2018. Originally approvedin 1963. Last previous edition approved in 2017 as A488/A488M 17. DOI:10.1520/A0488_A0488M-18.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. F

15、or Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis i

16、nternational standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT)

17、 Committee.1TABLE 1 Categories of Base MaterialsCategoryNumberMaterial DescriptionASTMSpecificationGrades1 Carbon steel (carbon less than0.35 %, tensile strength lessA27/A27M All gradesthan or equal to 70 ksi 485 MPa) A216/A216M WCA, WCBA352/A352M LCB, LCAA356/A356M 1A732/A732M 1A, 2AA757/A757M A1QA

18、958/A958M SC 1020, SC 1025, SC 1030, CLASSES 65/35,70/362 Carbon steel (tensile strengthgreater than 70 ksi 485 MPa).A148/A148M 80-40Carbon-manganese steel (tensilestrength equal to or greater than70 ksi 485 MPa).A216/A216M WCCbut less than 90 ksi 620 MPa). A352/A352M LCCA732/A732M 2Q, 3AA757/A757M

19、A2QA958/A958M SC 1030, SC 1040, SC 1045, CLASSES 80/40,80/503 Carbon and carbon-manganesesteel (tensile strength equal to orA732/A732M 3Q, 4A, 4Q, 5Ngreater than 90 ksi 620 MPa). A958/A958M SC 1045, CLASSES 90/60, 105/85, 115/954 Low-alloy steel (annealed,normalized, or normalized andtempered.A148/A

20、148M 80-50Tensile strength less than 85 ksi585 MPa).A217/A217M WC1, WC4, WC5, WC6, WC9A352/A352M LC1, LC2, LC3, LC4A356/A356M 2, 5, 6, 8A389/A389M C23, C24A487/A487M 11A, 12A, 16AA757/A757M B2N, B3N, B4NA958/A958M SC 4130, SC 4140, SC 8620, SC 8625, SC 8630,CLASSES 65/35, 70/36, 80/40, 80/505 Low-al

21、loy steel (annealed,normalized, or normalized andtempered.A148/A148M 90-60, 105-85Tensile strength equal to or greaterthan 85 ksi 585 MPa).A217/A217M C5, C12, C12A, WC11A356/A356M 9, 10, 12A487/A487M 1A, 1C, 2A, 2C, 4A, 4C, 6A, 8A, 9A, 9C, 10A,13AA732/A732M 6N, 15AA757/A757M D1N1, D1N2, D1N3, E2N1,

22、E2N2, E2N3A958/A958M SC 4340, CLASSES 90/60, 105/856 Low-alloy steel (quenched andtempered)A148/A148M 90-60, 105-85, 115-95, 130-115, 135-125,150-135, 160-145, 165-150, 165-150L, 210-180,210-180L, 260-210, 260-210LA352/A352M LC2-1, LC1, LC2, LC3, LC4, LC9A487/A487M 1B, 1C, 2B, 2C, 4B, 4C, 4D, 4E, 6B

23、, 7A, 8B, 8C,9A, 9B, 9C, 9D, 9E, 10B, 11B, 12B, 13B, 14AA732/A732M 7Q, 8Q, 9Q, 10Q, 11Q, 12Q, 13Q, 14QA757/A757M B2Q, B3Q, B4Q, C1Q, D1Q1, D1Q2, D1Q3, E1Q,E2Q1, E2Q2, E2Q3A958/A958M SC 4140, SC 4130, SC 4340, SC 8620, SC 8625,SC 8630, CLASSES 115/95, 130/115, 135/125,150/135, 160/145, 165/150, 210/1

24、807 Ferritic stainless steel A743/A743M CB-30, CC-508 Martensitic stainless steel A217/A217M CA-15A352/A352M CA6NMA356/A356M CA6NMA487/A487M CA15-A, CA15-B, CA15-C, CA15-D, CA15M-A,CA6NM-A, CA6NM-BA488/A488M 182A389/A389M Specification for Steel Castings, Alloy, Spe-cially Heat-Treated, for Pressure

25、-Containing Parts, Suit-able for High-Temperature ServiceA447/A447M Specification for Steel Castings, Chromium-Nickel-Iron Alloy (25-12 Class), for High-TemperatureServiceA487/A487M Specification for Steel Castings Suitable forPressure ServiceA494/A494M Specification for Castings, Nickel and NickelA

26、lloyA732/A732M Specification for Castings, Investment, Car-bon and Low Alloy Steel for General Application, andCobalt Alloy for High Strength at Elevated TemperaturesA743/A743M Specification for Castings, Iron-Chromium,Iron-Chromium-Nickel, Corrosion Resistant, for GeneralApplicationA744/A744M Speci

27、fication for Castings, Iron-Chromium-Nickel, Corrosion Resistant, for Severe ServiceA747/A747M Specification for Steel Castings, Stainless,Precipitation HardeningA757/A757M Specification for Steel Castings, Ferritic andMartensitic, for Pressure-Containing and OtherApplications, for Low-Temperature S

28、erviceA872/A872M Specification for Centrifugally Cast Ferritic/Austenitic Stainless Steel Pipe for Corrosive Environ-mentsA890/A890M Specification for Castings, Iron-Chromium-Nickel-Molybdenum Corrosion-Resistant, Duplex(Austenitic/Ferritic) for General ApplicationA958/A958M Specification for Steel

29、Castings, Carbon andAlloy, with Tensile Requirements, Chemical Require-ments Similar to Standard Wrought GradesA990/A990M Specification for Castings, Iron-Nickel-Chromium and Nickel Alloys, Specially Controlled forPressure-Retaining Parts for Corrosive ServiceA995/A995M Specification for Castings, A

30、ustenitic-FerriticTABLE 1 ContinuedCategoryNumberMaterial DescriptionASTMSpecificationGradesA743/A743M CA-15, CA-15M, CA6NM, CA-40, CA6N, CB6A757/A757M E3N9 Low-carbon austenitic stainlesssteel (carbon equal to or less than0.03 %)A351/A351M CF-3, CF-3A, CF-3M, CF-3MA, CF-3MN,CK-3MCUN, CG3M, CN3MNA74

31、3/A743M CF-3, CF-3M, CF-3MN, CK-3MCUN, CN-3M,CG3M, CN3MNA744/A744M CF-3, CF-3M, CK-3MCUN, CG3M, CN3MN10 Unstabilized austenitic stainlesssteel (carbon greater than 0.03 %)A351/A351M CF-8, CF-8A, CF-8M, CF-10, CF-10M, CG-8M,CH-8, CH-10, CH-20, CG6MMN, CF10SMNN,CE20NA447/A447M Type IA743/A743M CF-8, C

32、G-12, CF-20, CF-8M, CF-16F,CF10SMNN, CH-20, CG-8M, CE-30, CG6MMN,CH10, CF16FaA744/A744M CF-8, CF-8M, CG-8M11 Stabilized austenitic stainless steel A297/A297M HG10MNMA351/A351M CF-8C, CF-10MC, CK-20, HK-30, HK-40, HT-30,CN-7M, CT-15CA447/A447M Type IIA743/A743M CF-8C, CN-7M, CN-7MS, CK-20A744/A744M C

33、F-8C, CN-7M, CN-7MS12 Duplex (austenitic-ferritic) stainlesssteelA872/A872M J93183, J93550A890/A890M 1A, 1B, 2A, 3A, 4A, 5A, 6AA995/A995M 1B, 2A, 3A, 4A, 5A, 6A13 Precipitation-hardened austeniticstainless steelA747/A747M CB7CU-1, CB7CU-214 Nickel-base alloys A494/A494M CW-12MW, CY-40 Class 1, CY-40

34、 Class 2,CZ-100, M-35-1, M-35-2, M-30C, N-12MV, N-7M,CW-6M, CW-2M, CW-6MC, CX-2MW, CU5MCUCA990/A990M CW2M15 Steel Castings, Austenitic Manga-neseA128/A128M A, B-1, B-2, B-3, B-4, C, D, E-1, E-2, FA488/A488M 183FIG. 1 Report Form 1A488/A488M 184FIG. 2 Report Form 2A488/A488M 185REPORT FORM 3RECOMMEND

35、ED FORM FOR WELDING PROCEDURE SPECIFICATION1. TitleWelding ofAsteel castings.AIndicate general material description, such as carbon, Cr-Mo, 12 Cr, etc.2. Specification No. Rev.Date3. Scope3.1 Procedure Specification No. covers the welding ofAsteel castings using theBwelding process.AIndicate general

36、 material description in the Title.BIndicate specific welding process, such as shielded metal arc, etc.4. Base Material4.1 The base material shall conform to the specification forAwhich is found in materials category numberB.AInsert reference to ASTM designation or indicate chemical analysis andphys

37、ical properties.BIndicate category number from Table 1.4.2 Base material shall be in theAheat treated condition beforewelding.AIndicate heat treatment before welding.5. Filler Metal5.1 The filler metal shall conform to ANSI/AWS SpecificationAwhich is found in weld metal analysis group AB.AIndicate a

38、ppropriate American Welding Society specification number andfiller metal classification (e.g., A5.1 E7018).BIndicate A Number from Table 4.5.2 Flux for submerged arc welding shall conform to the following nominalcomposition:A.AIndicate chemical composition or trade designation.5.3 Shielding gas for

39、gas shielded arc welding shall conform to thefollowing nominal composition:A.AIndicate the single gas or proportional parts of mixed gases and flow rates.6. Preparation of Base Material6.1 Metal removal shall be performed byA.AIndicate method of metal removal, such as chipping, grinding, carbon arcc

40、utting, frame cutting, etc. Also indicate whether preheat is required duringmetal removal.6.2 Configuration of the weld preparation for partial penetration weldsshall conform to the following geometry:A.AIndicate minimum root radius and minimum side wall angle.6.3 Configuration of the weld preparati

41、on for full penetration welds shallconform to the following geometry:A.AIndicate minimum side wall angle.6.4 Backing plates shall be used for welding full penetration welds.Backing plates shall be made fromAsteel and shall fit the back ofthe cavity with a minimum gap ofB.AIndicate material of backin

42、g plate.BIndicate dimension of maximum gap.6.5 Surfaces of the weld preparation shall be cleaned of all oil, grease,dirt, scale, slag, shot blasting grit, or any foreign material which maybe harmful to the quality of the weld. Surfaces of backing plateswhen used shall also meet the same cleanliness

43、requirements.6.6 All surfaces of the weld preparation shall be inspected asfollows:A.AIndicate type of inspection.7. Preheat7.1 Preheat and interpass temperature shall be maintained in the rangefromAtoBduringC.AIndicate minimum temperature.BIndicate maximum temperature.CIndicate if preheat maintenan

44、ce is during welding or until postweld heattreatment is performed.7.2 Preheat for tack welding of backing plates is the same as requiredfor welding.7.3 Minimum temperature before applying heat shall beA.AIndicate temperature.7.4 Local preheating to the temperatures indicated may be performedso that

45、the heated area completely surrounds the weld preparation for aminimum distance ofAin any direction.AIndicate minimum distance for local preheating.8. Welding Position8.1 Welds shall be made in theAposition.AIndicate position or positions in which the welding will be performed. SeeFig. 4.9. Electric

46、al Characteristics9.1 The current used shall beA. The base material shall be attachedto theBwelding electrode lead.AIndicate whether direct or alternating current. If direct, state whethernon-pulsed or pulsed. If pulsed, state frequency.BIndicate whether electrode positive (EP) or electrode negative

47、 (EN) outputterminal of power supply is used.ElectrodeWireDiameterAAmperageARangeAVoltageAAIndicate for each diameter of electrode, the amperage, the range ofamperage permitted, and the voltage requirements. For welding processesusing wire, indicate wire diameter, wire feed speed, and current requir

48、ements.9.2 Electrodes subject to moisture absorption must be stored and handledto maintain dryness according to the following:A.AWhere applicable, indicate electrode care instructions.10. Welding Details10.1 The width of any pass of welding shall not exceedAtimesthe size of the filler metal used.AIn

49、dicate the number for controlling the maximum width.10.2 Craters shall be properly filled before each interruption of the arc.10.3 Slag or flux shall be removed on any bead before depositing thenext successive bead.10.4 Interpass inspection shall be performed according to the following:A.AIndicate degree of interpass inspection required.10.5 Peening shall be performed according to the following:A.AIndicate the degree of peening required. Indicate any limits on peeningfirst and last layers.11. Post-Weld Heat Treatment11.1 Post-weld heat treatment shall consist o