tailieunhanh - Standard Test Methods for Determining Hardenability of Steel

"Standard Test Methods for Determining Hardenability of Steel" cover the identification and description of test methods for determining the hardenability of steels. The two test methods include the quantitative end-quench or Jominy Test and a method for calculating the hardenability of steel from the chemical composition based on the original work by M. A. Grossman. | Designation A255 10 Reapproved 2014 Standard Test Methods for Determining Hardenability of Steel1 This standard is issued under the fixed designation A255 the number immediately following the designation indicates the year of original 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. This standard has been approved for use by agencies of the . Department of Defense. 1. Scope responsibility of the user of this standard to establish appro- These test methods cover the identification and descrip- priate safety and health practices and determine the applica- tion of test methods for determining the hardenability of steels. bility of regulatory limitations prior to use. The two test methods include the quantitative end-quench or Jominy Test and a method for calculating the hardenability of 2. Referenced Documents steel from the chemical composition based on the original work ASTM Standards 2 by M. A. Grossman. E18 Test Methods for Rockwell Hardness of Metallic Ma- The selection of the test method to be used for deter- terials mining the hardenability of a given steel shall be agreed upon E112 Test Methods for Determining Average Grain Size between the supplier and user. The Certified Material Test ASTM Adjuncts Report shall state the method of hardenability determination. ASTM Hardenability Chart3 The calculation method described in these test methods is applicable only to the range of chemical compositions that END-QUENCH OR JOMINY TEST follow Element Range 3. Description Carbon This test method covers the procedure for determining Manganese the hardenability of steel by the end-quench or Jominy test. The Silicon test consists of water quenching one end of a cylindrical test Nickel max Chromium max specimen in. in diameter and measuring