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.

Author: Goltigal Malataur
Country: Honduras
Language: English (Spanish)
Genre: Education
Published (Last): 26 November 2014
Pages: 359
PDF File Size: 11.60 Mb
ePub File Size: 13.88 Mb
ISBN: 668-7-17579-541-5
Downloads: 22004
Price: Free* [*Free Regsitration Required]
Uploader: Gujin

Material testing you can trust since Type, distribution, and size of observed graphite are compared with the idealiz ide alized ed micr microst ostruc ructur tures es in the stan standar dard d cha charts rts and rat rated ed acco ac cord rdin ingl gly y as cl clos osel ely y as po poss ssib ible le to th thee eq equa uall or si simil milar ar microstructures in the charts. However, the microstructure is typically evaluated by the percentage of Types I and II that are commonly observed.

Last previous edition approved in as A — 06 1. 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.

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

The American Society for Testing and Materials takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Occasionally, however, graphite in malleable or ductile iron may occur in atm nonrandom distribution pattern which the distributions B to E may be used to describe.

When this is impractical, a test lug or projection often can be cast attached to the casting and sawed or broken off to be used as the sample. Current Curre nt editio edition n appro approved ved March 1, 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.

  CALVINO MR PALOMAR PDF

Copyright ASTM Standard Test Method for Evaluating the 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.

Graphite distribution is designated by a capital letter A through E.

ASTM A247 – GRAPHITE MICROSTRUCTURE TESTING SERVICES

When this is impractical, a test lug or projection often can be cast attached to the casting and ast or broken off to be used as the sample. Graphite microstructure results are presented in the form of a microscopic image with a results table classifying the graphite.

Some malleable irons may contain Types I or II graphite particles also. It does not indicate, except in a very broad way, the origin of the graphite or the suitability of the iron-carbon alloy for a particular service. One section 1 x 1 x 0.

Size px x x x x Types present in a sample are to be reported in percentages to total Please copy and paste this embed script to where you want to embed Embed Script. 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. Classication of Graphite Form with Chart 7.

Report of Graphite Microstructure 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.

High magnification optical microscopy is required to reveal important details. Sample identication; graphite form type or types; graphite distribution; graphite size class. It is a common practice in malleable iron to use nodule count per unit area instead of a comparison chart as given here. Report of Graphite Microstructure Characteristic features of graphite particles are designated by numerals and letters.

  CULTIVO PALTA HASS PDF

Some malleable irons may contain Types I or II graphite particles also. Summ Summary ary of Test Test Method 3.

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

A number in parentheses indicates the year of last reapproval. This standard has been approved for use by agencies of the Department of Defense. ASTM B r E 3 Methods of Preparation of Metallographic Specimens2 3.

No further reproductions authorized. Sco Scope pe 1. At exactly diameters magnication the maximum dimension of the graphite particles for the various size classes are shown in Table 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 satm, are entirely their own responsibility. Classication of Graphite Size by Chart 9. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM Headquarters.

This method is only intended for the microstructure of graphite in iron castings. 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. We need your help! We are a asrm group that run this website to share documents. Advanced Plastic and Material Testing, Inc.