ASTM 247 PDF

ASTM 247 PDF

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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Usually visual comparison with the chart is adequate to dene the size class.

ASTM A247 – GRAPHITE MICROSTRUCTURE TESTING SERVICES

Replaces A — Nodule asttm, with known free carbon content, is a measure of calculated average nodule area. Graphite size is designated by an Arabic numeral 1 through 8. Any convenient magnication that clearly reveals the graphite form may be used.

Size px x x x x Where a mixture of one or more sizes occurs in asym same sample, the sizes may be reported as percentages of the total graphite area represented by the sizes involved. This standard has been approved for use by agencies of the Department of Defense. Referenc Referenced ed Documents Documents 2.

However, the microstructure is typically evaluated by the percentage of Types I and II that are commonly observed. Occasionally, however, graphite in malleable or ductile iron may occur in a nonrandom distribution pattern which the distributions B to E may be used to describe. Occasionally, however, graphite in malleable or ductile iron may occur in a nonrandom distribution pattern which the distributions B to E may be used to describe. Iron castings with graphite flakes gray iron are not as strong or impact resistant as those with round nodular graphite ductile iron.

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This standard has been approved for use by agencies of the Department of Defense.

ASTM A247-10 Standard Test Method for Evaluating the Microstructure of Graphite in Iron Castings

High magnification optical microscopy is required to reveal important details. At exactly diameters magnication the maximum dimension of the graphite particles for the various size classes are shown in Table 1.

It is the responsibility of the user of this standard to establish appropriate safety and health asmt and determine the applicability of regulatory limitations prior to use. It is the responsibility of the user of this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Types present in a sample are to be reported in percentages to total This method is only intended for the microstructure of graphite in iron castings.

Published Published April Please fill this form, we will try to respond as soon as possible. Classication of Graphite Size by Chart 9. Summ Summary ary of Test Test Method 3. 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.

In an appropriate specification for a specific material where graphite microstructure is an important consideration, this test method may be used as a reference to concisely define the graphite microstructure required.

Some malleable irons may contain Types I or II graphite particles also. Thank you for interesting in our services. Other microstructural details must be evaluated using different methods. Wstm testing you can trust axtm Please copy and paste this embed script to where you want to embed Embed Script.

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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.

ASTM A – 17 Standard Test Method for Evaluating the Microstructure of Graphite in Iron Castings

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. No other units of measurement are included in this standard. Graphite distribution is designated by a capital letter A through E.

Current Curre nt editio edition n appro approved ved March 1, Jesus Talledo Bermudez Category: 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, and the ductile nodular irons. Copyright ASTM Standard Test Method for Evaluating ashm Microstructure of Graphite in Iron Castings1 This standard is issued under the xed designation A ; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision.