ASTM A ASTM A Designation: A — 83 Reapproved Standard Speci? A number in parentheses indicates the year of last reapproval. A superscript epsilon?
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ASTM A ASTM A Designation: A — 83 Reapproved Standard Speci? A number in parentheses indicates the year of last reapproval.
A superscript epsilon? This standard has been approved for use by agencies of the Department of Defense. Scope 1. It contains some carbides and sufficient alloy content to produce an austenitic structure.
The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. Referenced Documents 2. Ordering Information 3.
Current edition approved May 1, Published August Originally approved in Last previous edition approved in as A - 83 The last approved version of this historical standard is referenced on www. Manufacture 4. These include cupolas, air furnaces, electric furnaces, crucible furnaces, etc. Otherwise, the austenite, which is super-saturated with respect to carbon, may reject carbon during service and produce dimensional changes.
Magnetic Properties 5. The maximum magnetic permeability value shall be agreed upon between the manufacturer and the purchaser. NOTE 1—A convenient shop test for differentiating the various types of austenitic ductile iron is based on the fact that a ground face of either the test bar or the castings of Types D-2 and D-2C will not attract a small steel horseshoe-type magnet which is normally attracted to steel Alnico magnet should not be used.
This nonmagnetic test is a convenient qualitative test only for Types D-2 and D-2C and shall not be used as a basis for acceptance.
Workmanship, Finish, and Appearance 8. The castings shall be free of injurious defects. Surfaces of the castings shall be free of burnt-on sand and shall be reasonably smooth. Runners, risers,? In other respects, the castings shall conform to whatever points may be speci? Test Bars 9. A modi? These test specimens shall be made to the dimensions shown in Fig. Test bars shall be left in the mold until they have cooled to a black appearance. If castings are to be heat treated, test bars shall be included in the same furnace load.
Number of Tests Chemical Requirements 6. This speci? Sampling shall be conducted in accordance with Practice E 59 and chemical analyses in accordance with Test Methods E and E Test Methods E 30 should only be used for analyzing those elements for which speci?
Drillings shall not be used because of attendant loss of graphite. Mechanical Requirements 7. Not intentionally added.
If any tension test shows obvious foundry or machining defects, another specimen may be cut from the same test bar or from another test bar representing the same metal.
If the retest specimen fails to conform to this speci? Tension Test Specimens In these cases, either of the test specimens shown in Fig. The location and orientation of such tension test specimens cut from castings shall be speci? Additional Tests Responsibility for Inspection Except as otherwise speci? The purchaser reserves the right to perform any of the inspections set forth in the speci?
Each certi? Packaging and Package Marking Packing and marking shall also be adequate to ensure acceptance and safe delivery by the carrier for the mode of transportation employed. Keywords The reduced section shall have a gradual taper from the ends toward the center, with the ends 0.
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ASTM A439 Type D-2 (S-NiCr 20 2, F43000) Cast Iron
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ASTM A439 Grade Type D-2 As-Cast or Heat-Treated
Cited properties are appropriate for the stress relieved condition. F is the UNS number. The graph bars on the material properties cards below compare ASTM A type D-2 to: cast irons top , all iron alloys middle , and the entire database bottom. A full bar means this is the highest value in the relevant set. Ranges represent what is permitted under applicable standards. Below is a simple format for citing this page as a source. If you belong to an institution that sets its own citation guidelines, use those instead.