Offering fast and affordable ASTM A Jominy End Quench Test of Hardenability along with heat treating and metallurgy expertise. This standard is issued under the fixed designation A ; the number 1 These test methods are under the jurisdiction of ASTM Committee A01 on. Steel. ASTM A Determining Hardenability of Steel – Designation: A – 99 An American National S.
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It is astm a quantitatively, usually by noting the extent or depth of hardening of a standard size and shape of test specimen in a standardized astm a As the voice of the U. This standard is also available to be included in Standards Subscriptions.
ASTM A – Standard Test Methods for Determining Hardenability of Steel
Index of Hardenability 8. Active view astk version of standard. We have no amendments or corrections for this standard. Please first log in with a verified email before subscribing to alerts. Historical Version s – view previous versions of standard Translated Version s: The two test methods include the quantitative end-quench or Jominy Test and a method for calculating the a55 of steel from the chemical composition based on the original work by M.
A graphite or metal mold may be used to form an overlength specimen 1.
In production testing slightly longer times up to 35 min may be used without appreciably affecting results. The Certified Material Test Report shall state the method a55 hardenability a525. It is measured quantitatively, usually by noting the extent or depth of hardening of a standard size and shape of test specimen in a standardized quench.
The specimen shall be machined from a bar previously normalized in accordance with 6. If the specimen is not cold when removed from the? This may be accomplished by heating the specimen in a vertical position in a container with an easily removable cover containing a layer of cast-iron chips aa255 the bottom face of the specimen resting on the chips.
The previous thermal history of the specimen tested shall always be recorded.
This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? If the standard hardenability curve is needed, then the insert test specimen shown in Fig. A facsimile of the standard ASTM hardenability chart3 on which asgm hardenability curves have been plotted is shown in Fig.
An anvil providing a means of very accurately measuring the distance from the quenched end is essential.
Plating and Coating Testing. For comparison of this test method to others, or for steel compositions outside the mentioned grades, the user should refer to other articles concerned with calculating hardenability. It is measured quantitatively, usually by noting the extent or depth of hardening of a standard size and shape of test specimen in a standardized quench.
A — 99 Determinin It has been found that with reasonable operating care and a well-built? Carbon multiplying factor 5 0. A525 edition approved March 10, Resting the specimen in a V-block is not permitted. Subscription pricing is determined by: For simplicity, the DI should be rounded to the nearest 0.
ASTM A255 PDF DOWNLOAD
Examples of this method are J 4? After the quench, warm the assembly in boiling water to melt the Woods metal and remove the specimen. This test astm a assures that the aatm a you are asrm is going to respond correctly to heat treatment. Maintain a condition of still air around the specimen during cooling.
Normalizing may be waived by agreement between the supplier and the user. Tempering of the normalized sample to improve machinability is permitted.
Etch in solution No. Already Subscribed to this document. The variations between spacings should be even smaller. The sheath shall preferably be made from a plain low-carbon steel.