ASTM A – GRAPHITE MICROSTRUCTURE TESTING SERVICES – ASTM A is a method of evaluating the microstructure of graphite in iron castings. Designation: A – 67 (Reapproved ) Standard Test Method for Evaluating the Microstructure of Graphite in Iron Castings1. ASTM A Standard Test Method for Evaluating the Microstructure of Graphite in Iron Castings – Download as PDF File .pdf), Text File .txt) or read online.

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One section 1 x 1 x 0. Link to Active This link will astm a247 route to the current Active version of the standard.

No other units of measurement are included in this standard. It does not indicate, except in ast, very broad way, the origin of the graphite or the suitability of the iron-carbon alloy for a particular service. The excess carbon in iron castings astm a247 into graphite of various forms.

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.


This method is only intended astm a247 the microstructure of graphite in iron castings. Advanced Plastic and Astm a247 Testing, Inc.

Graphite microstructure results are presented in the form of a microscopic image with a results table classifying the graphite. Our laboratory also provides laboratory services for plastic testingmetal testingrubber testingoil astm a247paint testingplating testingastm a247 testingcircuit board testingastm a247 other testing.

Iron castings with graphite flakes gray iron are not as strong or impact resistant as those with round nodular graphite ductile iron.

Referenced Documents purchase separately The documents listed below are sstm within the subject standard but are not provided as part of the standard. Astm a247 testing you can trust since Other microstructural details must be evaluated using different methods.


High astm a247 optical microscopy is required to reveal important details. It is the responsibility of the user of this standard to establish appropriate safety and astm a247 practices and determine the applicability of regulatory limitations prior to use. In an appropriate specification for a specific material where graphite microstructure is an important consideration, this test method may s247 used as a reference to concisely define the graphite microstructure required.


The size astm a247 graphite particles can range from very small Size 8 to relatively large Size 1. Good microstructural results require significant astm a247 to obtain a mirror finish with no scratches or edge a47 prior to etching.

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

ASTM A is a method of evaluating astm a247 microstructure of graphite in iron castings. ASTM A provides images used astm a247 classify the form, distribution, and size of the graphite in an iron casting. Graphite microstructure is useful in predicting the strength and impact resistance of an iron casting at specific locations.

Ashm Version s – view previous asrm of standard. Flake graphite can have a desirable random distribution Type A or a weaker oriented distribution Type D or E.