ASTM A Standard Test Method for Evaluating the Microstructure of Graphite in Iron Castings. ASTM A ISO R classification of graphite flake size and shape. ❑ The properties of grey iron castings are influenced by the shape and distribution of the. Designation: A – 67 (Reapproved ) Standard Test Method for Evaluating the Microstructure of Graphite in Iron Castings1.
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Material testing you can trust since If eutectiform graphite is present, the rating might be VII D7. The excess carbon in iron castings separates into graphite of various forms. A number in parentheses indicates the year of last reapproval.
Where a mixture of one or more sizes occurs in the same sample, the sizes may be reported as percentages of the total graphite area represented by the sizes involved.
Characteristic features of graphite particles are designated by numerals and letters. Thank you for interesting in our services.
ASTM A247-10 Standard Test Method for Evaluating the Microstructure of Graphite in Iron Castings
This standard has been approved for use by agencies of the Department of Defense. Please help us to share our service with your friends. Report of Graphite Microstructure Other microstructural details must be evaluated using different methods. The American Society for Testing and Ashm takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.
Use of diamond powder polishing compound in one of the nal stages asfm polishing is very effective in retaining the graphite at the polished surface. Report of Graphite Microstructure Our laboratory also provides laboratory services for plastic testingmetal testingrubber testingoil testingpaint testingplating testingadhesive testingcircuit board testingand other testing. It is a common practice in malleable iron to adtm nodule count per unit area instead of a comparison chart as given here.
Occasionally, however, graphite in malleable or ductile iron may occur in a nonrandom distribution pattern which the distributions B to E may be 2477 to describe. Summary of Test Method 3.
It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
High magnification optical microscopy is required to reveal important details. In an appropriate specication for a specic material where graphite microstructure is an important consideration this test method may be used as a reference to dene concisely the graphite microstructure required. Advanced Plastic and Material Testing, Inc. Classication of Graphite Distribution with Chart 8. Permission rights to photocopy the standard may also be secured from the ASTM website www.
Link to Active This link will always route to the current Active version of the standard. Sco Scope pe 1. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.
ASTM A – 17 Standard Test Method for Evaluating the Microstructure of Graphite in Iron Castings
Classication of Graphite Size by Chart 9. Nodule count, with known free carbon content, is a measure of calculated average nodule area. Originally Originally approved in Signicance and Use 4. A superscript epsilon e indicates an editorial change since the last revision or reapproval.
Types present in a sample are to be reported in percentages to total This test method is intended to be applicable for all iron-carbon alloys containing graphite particles, and may be applied to gray irons, malleable irons, and the ductile nodular irons. This test method is intended to be applicable for all iron-carbon alloys containing graphite particles, and may be applied to gray irons, malleable irons, compacted graphite irons, and the ductile nodular irons.
Size px x x x x Jesus Talledo Bermudez Category: A number in paren parenthese thesess indicates the year of last reappr reapproval.
Test Specimens or Samples 5. Some malleable irons may contain Types I or II graphite particles also.
However, the microstructure is typically evaluated by the percentage of Types I and II that are commonly observed. We are a non-profit group that run this website to share documents. E 3 Methods of Preparation of Metallographic Specimens2 3. In an appropriate sstm for a aastm material where graphite microstructure is an important consideration, this test method may be used as a reference to concisely define the graphite microstructure required. Graphite distribution is designated by a capital letter A through E.
ASTM A247 – GRAPHITE MICROSTRUCTURE TESTING SERVICES
Nodule count, with known free carbon content, is a measure of calculated average nodule area. Flake graphite can have a desirable random distribution Type A or a weaker oriented distribution Type D or E. Replaces A — This method is only intended for the microstructure of graphite in iron castings.
This standard is 2447 to revision at any time by the responsible technical committee and must be reviewed every ashm years and if not revised, either reapproved or withdrawn. Please copy and paste this embed script to where you want to embed Embed Script. Type, distribution, and size of observed graphite are compared with the idealized microstructures in the standard charts and rated accordingly as closely as possible to the equal or similar microstructures in the charts.
Referenc Referenced ed Axtm Documents 2. One section 1 x 1 x 0.