1、Designation: A 915/A 915M 08Standard 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 original adoption o
2、r, 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. Scope*1.1 This specification covers carbon and low alloy steelcastings having chemical
3、 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 shown in brackets.
4、 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 A 915 and SI unit
5、s for material ordered toSpecification A 915M.2. Referenced Documents2.1 ASTM Standards:2A 370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA 781/A 781M Specification for Castings, Steel and Alloy,Common Requirements, for General Industrial Use3. Ordering Information3.1 Orders
6、 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 Options in the specifi
7、cation, 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, normalizing and tempering
8、, 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 castingshave been allowe
9、d 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 product analysi
10、s 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/A 781M,including t
11、he 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 magnetic particle
12、 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 which the cavit
13、y 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 responsibility of Subcommittee
14、A01.18 on Castings.Current edition approved March 1, 2008. Published March 2008. Originallyapproved in 1993. Last previous edition approved in 2003 as A 915/A 915M 93(2003).2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For A
15、nnual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.7.2 Wel
16、d 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 Grades SC 1020, SC 1025, or SC 1030 whichcontain major weld repair
17、s 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 thermal stressrelief or a complete reheat treatment. The postweld heattreatment shall be in accord
18、ance 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 specified in the order may be rejected by thepurchaser. The manufacturer should be notified of such rej
19、ec-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 specified in the pu
20、rchase 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 with thisspecification are given below together with additional supplementary requirements that are a
21、pplicableonly 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.S1. Magnetic particle examination.S2. Radiographic examination.S3. Liquid penetrant examination.S4.
22、 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. Unspecified elements.S14. Tension test from casting.S15. Alternate tension test coupons.S50. Tension test
23、.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 castings it represents. The results shallconform to requirements agreed upon between the manufac-tu
24、rer 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 0.40/0.80 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/
25、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 0.40/0.80 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
26、.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 0.20/0.30SC 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(
27、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 082S50.2 Test bars shall be poured in separately cast keelblocks similar to Fig. 1 in Specification A 781/A 781M.S50.3 Tens
28、ion 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 standard
29、round 2-in. 50-mm gage lengthspecimen shown in Fig. 4 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 mechanical tests for any heat, lot,or casting do not conform to the requirements agreed upon,retests are pe
30、rmitted 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 reaustenitized more than three times withoutthe approval of the purchaser. Testing after reheat treatmentshall consist
31、 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.SUMMARY OF CHANGESCommittee A01 has identified the location of
32、selected changes to this standard since the last issue(A 915/A 915M-93(2003) that may impact the use of this standard. (Approved March 1, 2008.)(1) Changed Fig. 6 to Fig. 4 in S50.4.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item
33、 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 responsible technical commi
34、ttee 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 consideration at a me
35、eting 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, 100 Barr Harbor Drive,
36、 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 083
