ASTM A915 A915M-2008(2013) Standard Specification for Steel Castings Carbon and Alloy Chemical Requirements Similar to Standard Wrought Grades《化学要求同锻件类似的碳素钢和合金钢标准规格》.pdf

1、Designation: A915/A915M 08 (Reapproved 2013)Standard Specification forSteel Castings, Carbon, and Alloy, Chemical RequirementsSimilar to Standard Wrought Grades1This standard is issued under the fixed designation A915/A915M; the number immediately following the designation indicates the yearof origi

2、nal adoption or, in the case of revision, the year 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.1. Scope1.1 This specification covers carbon and low alloy steelcastings hav

3、ing chemical analyses similar to that of thestandard wrought grades.1.2 Several grades are covered and are designated bychemical composition shown in Table 1.1.3 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. The values stated ineach system may not

4、 be exact equivalents; therefore, eachsystem shall be used independently of the other. Combiningvalues from the two systems may result in non-conformancewith the standard.1.3.1 Within the text, the SI units are shown in brackets.1.3.2 Inch-pound units are applicable for material ordered toSpecificat

5、ion A915 and SI units for material ordered toSpecification A915M.2. Referenced Documents2.1 ASTM Standards:2A370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA781/A781M Specification for Castings, Steel and Alloy,Common Requirements, for General Industrial Use3. Ordering Infor

6、mation3.1 Orders for material under this specification shouldinclude the following information:3.1.1 Quantity,3.1.2 Specification, including year, date, and grade,3.1.3 Description of the casting by pattern number ordrawing. Dimensional tolerances shall be included on thecasting drawing,3.1.4 Option

7、s in the specification, and3.1.5 Supplementary requirements desired, including stan-dards of acceptance.4. Heat Treatment4.1 Grades SC 1020 and SC 1025 may be supplied unheattreated or heat treated as described in 4.2.4.2 Castings shall be heat treated either by full annealing,normalizing, normalizi

8、ng and tempering, or quenching andtempering. Unless otherwise specified in the inquiry, contract,or order, the castings may be heat treated by any of these heattreatments or combination of these heat treatments at the optionof the manufacturer.4.3 Heat treatment shall be performed after the castings

9、have been allowed to cool below the transformation range.4.4 The furnace temperature for heat treating shall beeffectively controlled by the use of recording-type pyrometers.5. Chemical Composition5.1 The steel shall conform to the requirements of chemicalcomposition as prescribed in Table 1.5.2 The

10、 product analysis tolerances given in SpecificationA781/A781M shall apply to all product analysis performed oncastings supplied to this specification.6. General Conditions for Delivery6.1 Material furnished to this specification shall conform tothe applicable requirements of Specification A781/A781M

11、,including the supplementary requirements indicated on thepurchasers order.7. Repair by Welding7.1 Weld repairs shall be inspected to the same qualitystandards used to inspect the castings. When castings areproduced with Supplementary Requirement S1 specified, weldrepairs shall be inspected by magne

12、tic particle examination tothe same standards used to inspect the castings. When castingsare produced with Supplementary Requirement S2 specified,weld repairs in which the depth of the cavity prepared forrepair welding exceeds 20 % of the wall thickness or 1 in. 25mm, whichever is smaller, or in whi

13、ch the cavity prepared for1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.18 on Castings.Current edition approved April 1, 2013. Published April 2013. Originallyapproved in 1993. Last

14、previous edition approved in 2008 as A915/A915M 08.DOI: 10.1520/A0915_A0915M-08R13.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary pa

15、ge onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1welding is greater than approximately 10 in.265 cm2, shall beradiographed to the same standards used to inspect the cast-ings.7.2 Weld repairs shall be considered m

16、ajor when the depthof the cavity prepared for welding exceeds 20 % of the wallthickness or 1 in. 25 mm, whichever is smaller, or when theextent of the cavity exceeds 10 in.265 cm2. Castingsproduced from Grades SC 1020, SC 1025, or SC 1030 whichcontain major weld repairs shall receive a postweld heat

17、treatment. Castings produced from any of the other grades shallreceive a postweld heat treatment regardless of weld repairsize. Postweld heat treatment shall consist of a thermal stressrelief or a complete reheat treatment. The postweld heattreatment shall be in accordance with the qualified weldpro

18、cedure used.8. Rejection and Rehearing8.1 Subsequent to acceptance at the manufacturers works,material which is found to be unacceptable as determined byrequirements specified in the order may be rejected by thepurchaser. The manufacturer should be notified of such rejec-tion. If the manufacturer is

19、 dissatisfied with the results of anytests performed by the purchaser, he may make claim for arehearing.9. Keywords9.1 alloy steel; carbon steel; steel castingsSUPPLEMENTARY REQUIREMENTSThe following supplementary requirements shall not apply unless specified in the purchase order. Alist of standard

20、ized supplementary requirements for use at the option of the purchaser is included inSpecification A781/A781M. Those which are ordinarily considered suitable for use with thisspecification are given below together with additional supplementary requirements that are applicableonly to this specificati

21、on. Other supplementary requirements enumerated in Specification A781/A781M may be used with this specification upon agreement between the manufacturer and purchaser.S1. Magnetic particle examination.S2. Radiographic examination.S3. Liquid penetrant examination.S4. Ultrasonic examination.S5. Examina

22、tion of weld preparation.S6. Certification.S7. Prior approval of major weld repairs.S8. Marking.S9. Charpy impact test.S10. Hardness test.S12. Test report.S13. Unspecified elements.S14. Tension test from casting.S15. Alternate tension test coupons.TABLE 1 Chemical Composition (weight, percent)Grade

23、C Mn P, max S, max Si Ni Cr MoSC 1020(J02003)0.18/0.23 0.40/0.80 0.040 0.040 0.30/0.60 . . . . . . . . .SC 1025(J02508)0.22/0.28 0.40/0.80 0.040 0.040 0.30/0.60 . . . . . . . . .SC 1030(J03012)0.28/0.34 0.50/0.90 0.040 0.040 0.30/0.60 . . . . . . . . .SC 1040(J04003)0.37/0.44 0.50/0.90 0.040 0.040 0

24、.30/0.60 . . . . . . . . .SC 1045(J04502)0.43/0.50 0.50/0.90 0.040 0.040 0.30/0.60 . . . . . . . . .SC 4130(J13502)0.28/0.33 0.40/0.80 0.035 0.040 0.30/0.60 . . . 0.80/1.10 0.15/0.25SC 4140(J14045)0.38/0.43 0.70/1.10 0.035 0.040 0.30/0.60 . . . 0.80/1.10 0.15/0.25SC 4330(J23259)0.28/0.33 0.60/0.90 0

25、.035 0.040 0.30/0.60 1.65/2.00 0.70/0.90 0.20/0.30SC 4340(J24053)0.38/0.43 0.60/0.90 0.035 0.040 0.30/0.60 1.65/2.00 0.70/0.90 0.20/0.30SC 8620(J12095)0.18/0.23 0.60/1.00 0.035 0.040 0.30/0.60 0.40/0.70 0.40/0.60 0.15/0.25SC 8625(J12595)0.23/0.28 0.60/1.00 0.035 0.040 0.30/0.60 0.40/0.70 0.40/0.60 0

26、.15/0.25SC 8630(J13095)0.28/0.33 0.60/1.00 0.035 0.040 0.30/0.60 0.40/0.70 0.40/0.60 0.15/0.25A915/A915M 08 (2013)2S50. Tension test.S50.1 Tensile properties shall be determined from materialrepresenting each heat. The bar from which the test specimenis taken shall be heat treated in production furn

27、aces to the sameprocedure as the castings it represents. The results shallconform to requirements agreed upon between the manufac-turer and purchaser.S50.2 Test bars shall be poured in separately cast keelblocks similar to Fig. 1 in Specification A781/A781M.S50.3 Tension test specimens may be cut fr

28、om heat treatedcastings, or from as-cast castings if no heat treatment isspecified for the castings, instead of from test bars, whenagreed upon between the manufacturer and the purchaser.S50.4 Test specimens shall be machined to the form anddimensions of the standard round 2-in. 50-mm gage lengthspe

29、cimen shown in Fig. 4 of Test Methods and DefinitionsA370, and shall be tested in accordance with Test Methods andDefinitions A370.S50.5 If the results of the mechanical tests for any heat, lot,or casting do not conform to the requirements agreed upon,retests are permitted as outlined in Test Method

30、s and Defini-tions A370. At the manufacturers option, castings may bereheat-treated and retested. When castings are reheat-treated,they may not be reaustenitized more than three times withoutthe approval of the purchaser. Testing after reheat treatmentshall consist of the full number of specimens ta

31、ken fromlocations complying with the specification or order.S50.6 If any test specimen shows defective machining ordevelops flaws, it may be discarded and another specimensubstituted from the same heat.ASTM International takes no position respecting the validity of any patent rights asserted in conn

32、ection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the respons

33、ible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful c

34、onsideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 10

35、0 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).A915/A915M 08 (2013)3