1、Designation: A915/A915M 08 (Reapproved 2018)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 those 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 no
4、t be exact equivalents; therefore, eachsystem shall be used independently of the other. Combiningvalues from the two systems may result in nonconformancewith 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.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mend
6、ations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.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 Industr
7、ial Use3. Ordering Information3.1 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 thecast
8、ing drawing,3.1.4 Options 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 annealin
9、g,normalizing, normalizing 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 perf
10、ormed after the castingshave 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 presc
11、ribed in Table 1.5.2 The 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
12、Specification A781/A781M,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 sha
13、ll be inspected by magnetic particle examination to1This 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 Sept. 1, 2018. Published September 2018. Orig
14、inallyapproved in 1993. Last previous edition approved in 2013 as A915/A915M 08(2013). DOI: 10.1520/A0915_A0915M-08R18.2For 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
15、to the standards Document Summary page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established
16、 in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1the same standards used to inspect the castings. When castingsare produced with Supplementary Requirement S2 sp
17、ecified,weld repairs in which the depth of the cavity prepared forrepair welding exceeds 20 % of the wall thickness or 1 in.25 mm, whichever is smaller, or in which the cavity preparedfor welding is greater than approximately 10 in.265 cm2,shall be radiographed to the same standards used to inspect
18、thecastings.7.2 Weld repairs shall be considered major 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 Grade SC 1020, SC 1025, or SC 1030 thatcontain
19、major weld repairs shall receive a post-weld heattreatment. Castings produced from any of the other grades shallreceive a post-weld heat treatment regardless of weld repairsize. Post-weld heat treatment shall consist of a thermal stressrelief or a complete reheat treatment. The post-weld heattreatme
20、nt shall be in accordance with the qualified weldprocedure used.8. Rejection and Rehearing8.1 Subsequent to acceptance at the manufacturers works,material that is found to be unacceptable as determined byrequirements specified in the order may be rejected by thepurchaser. The manufacturer should be
21、notified of such rejec-tion. If the manufacturer is 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
22、 specified in the purchase order. Alist of standardized 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 requi
23、rements that are applicableonly to this specification. Other supplementary requirements enumerated in Specification A781/A781M may be used with this specification upon agreement between the manufacturer and purchaser.TABLE 1 Chemical Composition (weight, percent)Grade C Mn P, max S, max Si Ni Cr MoS
24、C 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 0.30/0.60 . . . . . . . . .SC 10
25、45(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 0.035 0.040 0.30/0.60 1.65/2.00
26、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 0.15/0.25SC 8630(J13095)0.28/0.3
27、3 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 (2018)2S1. Magnetic Particle ExaminationS2. Radiographic ExaminationS3. Liquid Penetrant ExaminationS4. Ultrasonic ExaminationS5. Examination of Weld PreparationS6. CertificationS7. Prior Approval of Major Weld RepairsS8. M
28、arkingS9. Charpy Impact TestS10. Hardness TestS12. Test ReportS13. Unspecified ElementsS14. Tension Test from CastingS15. Alternate Tension Test CouponsS50. Tension TestS50.1 Tensile properties shall be determined from materialrepresenting each heat. The bar from which the test specimenis taken shal
29、l be heat treated in production furnaces 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
30、Tension test specimens may be cut from 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 stand
31、ard round 2-in. 50-mm gage lengthspecimen 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
32、permitted as outlined in Test Methods and Defini-tions A370. At the manufacturers option, castings may bereheat treated and retested. When castings are reheat treated,they may not be re-austenitized more than three times withoutthe approval of the purchaser. Testing after reheat treatmentshall consi
33、st of the full number of specimens taken 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
34、of any patent rights asserted in connection 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 t
35、o revision at any time by the responsible 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.
36、 Your comments will receive careful consideration 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
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