1、Designation: A 915/A 915M 93 (Reapproved 2003)Standard Specification forSteel Castings, Carbon, and Alloy, Chemical RequirementsSimilar to Standard Wrought Grades1This standard is issued under the fixed designation A 915/A 915M; the number immediately following the designation indicates the yearof o
2、riginal 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 (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers carbon and low alloy steelcasting
3、s having 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 inch-pound units or SI unitsare to be regarded separately as standard. Within the text, theSI units are s
4、hown in brackets. The values stated in eachsystem are not exact equivalents; therefore, each system mustbe used independently of the other. Combining values from thetwo systems may result in nonconformance with the specifi-cation. Inch-pound units are applicable for material ordered toSpecification
5、A 915 and SI units for material ordered toSpecification A 915M.2. Referenced Documents2.1 ASTM Standards:A 370 Test Methods and Definitions for Mechanical Testingof Steel Products2A 781/A 781M Specification for Castings, Steel and Alloy,Common Requirements, for General Industrial Use33. Ordering Inf
6、ormation3.1 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 Opti
7、ons 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, normali
8、zing 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 castin
9、gshave 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 T
10、he product analysis tolerances given in SpecificationA 781/A 781M 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 A 781/
11、A 781M,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
12、 magnetic particle examination tothe same standards used to inspect the castings. When castingsare produced with Supplementary Requirement S2specified,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 i
13、n which the cavity prepared forwelding is greater than approximately 10 in.265 cm2, shall beradiographed to the same standards used to inspect the cast-ings.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel, and Related Alloys and is the direct responsibili
14、ty of SubcommitteeA01.18 on Castings.Current edition approved April 10, 2003. Published April 2003. Originallyapproved in 1993. Last previous edition approved in 1998 as A 915/A 915M 93(1998).2Annual Book of ASTM Standards, Vol 01.03.3Annual Book of ASTM Standards, Vol 01.02.1Copyright ASTM Internat
15、ional, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.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
16、.265 cm2. Castingsproduced from Grades SC 1020, SC 1025, or SC 1030 whichcontain major weld repairs shall receive a postweld heattreatment. Castings produced from any of the other grades shallreceive a postweld heat treatment regardless of weld repairsize. Postweld heat treatment shall consist of a
17、thermal stressrelief or a complete reheat treatment. The postweld heattreatment shall be in accordance with the qualified weldprocedure used.8. Rejection and Rehearing8.1 Subsequent to acceptance at the manufacturers works,material which is found to be unacceptable as determined byrequirements speci
18、fied in the order may be rejected by thepurchaser. The manufacturer should be 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 castingsSUPPLEMENTA
19、RY REQUIREMENTSThe following supplementary requirements shall not apply unless specified in the purchase order. Alist of standardized supplementary requirements for use at the option of the purchaser is included inSpecification A 781/A 781M. Those which are ordinarily considered suitable for use wit
20、h thisspecification are given below together with additional supplementary requirements that are applicableonly to this specification. Other supplementary requirements enumerated in Specification A 781/A 781M may be used with this specification upon agreement between the manufacturer and purchaser.S
21、1. Magnetic particle examination.S2. Radiographic examination.S3. Liquid penetrant examination.S4. Ultrasonic examination.S5. Examination 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. Unspeci
22、fied elements.S14. Tension test from casting.S15. Alternate tension test coupons.S50. 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 furnaces to the sameprocedure as the c
23、astings it represents. The results shallconform to requirements agreed upon between the manufac-turer and purchaser.TABLE 1 Chemical Composition (weight, percent)Grade 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 0.4
24、0/0.80 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 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.
25、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 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/
26、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)0.28/0.33 0.60/1.00 0.035 0.040 0.30/0.60 0.40/0.70 0.40/0.60 0.15/0.25A 915/A 915M 93 (2003)2S50.2 Test bars
27、 shall be poured in separately cast keelblocks similar to Fig. 1 in Specification A 781/A 781M.S50.3 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 manufac
28、turer and the purchaser.S50.4 Test specimens shall be machined to the form anddimensions of the standard round 2-in. 50-mm gage lengthspecimen shown in Fig. 6 of Test Methods and DefinitionsA 370, and shall be tested in accordance with Test Methods andDefinitions A 370.S50.5 If the results of the me
29、chanical tests for any heat, lot,or casting do not conform to the requirements agreed upon,retests are permitted as outlined in Test Methods and Defini-tions A 370. At the manufacturers option, castings may bereheat-treated and retested. When castings are reheat-treated,they may not be reaustenitize
30、d more than three times withoutthe approval of the purchaser. Testing after reheat treatmentshall consist 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 anoth
31、er specimensubstituted from the same heat.ASTM International takes no position respecting the validity 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 t
32、he riskof infringement of such rights, are entirely their own responsibility.This standard is subject to 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
33、of this standard or for additional standardsand should be addressed to ASTM International Headquarters. 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 shoul
34、dmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 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).A 915/A 915M 93 (2003)3
