This document provides a method for the evaluation of the resistance to hydrogen embrittlement (i.e. hydrogen delayed fracture) using constant loading test with hydrogen pre-charged specimens. The amount of hydrogen content absorbed in the specimens is analysed quantitatively by thermal desorption analysis such as gas chromatography, mass spectrometry and so on. In the case of hydrogen continuous charging such as hydrogen absorption in aqueous solution at free corrosion potential, hydrogen absor...view more

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    • Standard
      11 pages
      English language

This document specifies a micrographic method of determining apparent ferritic or austenitic grain size in steels. It describes the methods of revealing grain boundaries and of estimating the mean grain size of specimens with unimodal size distribution. Although grains are three-dimensional in shape, the metallographic sectioning plane can cut through a grain at any point from a grain corner, to the maximum diameter of the grain, thus producing a range of apparent grain sizes on the two-dimensio...view more

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    • Standard
      21 pages
      English language
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    • Standard
      21 pages
      French language

ISO 3887:2017 defines the decarburization and specifies three methods of measuring the depth of decarburization of steel products.

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    • Standard
      13 pages
      English language
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    • Standard
      13 pages
      French language

ISO 18203:2016 specifies a method of measuring the case hardening depth, surface hardening depth, nitriding hardness depth and total thickness of surface hardening depth obtained, e.g. thermal (flame and induction hardening, electron beam hardening, laser beam hardening, etc.) or thermochemical (carbonitriding, carburizing and hardening, hardening and nitriding, etc.) treatment.

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    • Standard
      12 pages
      French language
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    • Standard
      12 pages
      English language

ISO 17577:2016 specifies a method for the automated and/or manual ultrasonic testing of uncoated steel flat products for internal discontinuities by the pulse echo technique. It is applicable to non-alloyed or alloyed steel flat products, in a nominal thickness range of 6 mm to 200 mm. However, this International Standard may be applied to austenitic and austenitic-ferritic steels, provided that the difference between the amplitude of the noise signal and that of the echo detection threshold is ...view more

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    • Standard
      14 pages
      French language
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    • Standard
      13 pages
      English language
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    • Standard
      14 pages
      French language
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    • Standard
      13 pages
      English language

ISO 16574:2015 defines resolvable pearlite and specifies two methods of determining the percentage of resolvable pearlite. The methods are applicable for wire rod made from control cooling steel with carbon content greater than 0,65 % C.

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    • Standard
      5 pages
      English language

ISO 4969:2015 establishes guidelines for the macroscopic examination of steel by hot etching, room temperature etching and electrolytic etching. The method has very wide application. Selection of the type, concentration and temperature of the reagent, the etching apparatus and the conditions of surface preparation of the test piece make it possible to achieve the required aim. NOTE It might be difficult to see fine voids and cracks and discriminate between them and determine their nature by macr...view more

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    • Standard
      9 pages
      French language
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    • Standard
      9 pages
      English language

ISO 4967:2013 specifies a micrographic method of determining the non-metallic inclusions in rolled or forged steel products having a reduction ratio of at least 3 using standard diagrams. This method is widely used to assess the suitability of a steel for a given use. However, since it is difficult to achieve reproducible results owing to the influence of the test operator, even with a large number of specimens, precautions should be taken when using the method. ISO 4967:2013 also provides for t...view more

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    • Standard
      40 pages
      French language
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    • Standard
      39 pages
      English language
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    • Draft
      37 pages
      French language
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    • Draft
      37 pages
      English language
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    • Draft
      37 pages
      English language

This International Standard specifies a micrographic method of determining the duplex grain size of rolled or forged steel products using standard diagrams or by the point count procedure.

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    • Standard
      9 pages
      French language
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    • Standard
      9 pages
      English language
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    • Standard
      18 pages
      English language
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    • Standard
      18 pages
      French language
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    • Standard
      9 pages
      English language
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    • Standard
      10 pages
      French language
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    • Standard
      6 pages
      English language
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    • Standard
      6 pages
      French language

Applies to constituents (a phase as well as a micrographic constituent composed of two or more phases) which are clearly identifiable. The point grid is superimposed a given number of fields of the observed surface. By counting the number of points the volume fraction is calculated.

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    • Standard
      4 pages
      French language
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    • Standard
      4 pages
      French language
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    • Standard
      4 pages
      English language

Specifies a method for assessing steels with C levels between 0,1 % and 1,5 % and a total content of alloy elements less than or equal to 5 %. The use of this method for other steels shall be subject to special agreement. Contains principles, sampling, preparation of samples, assessment of the distribution of carbides, expression of results and test report. An annex gives reference photomicrographs.

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    • Standard
      10 pages
      English language
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    • Standard
      10 pages
      French language
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    • Standard
      10 pages
      French language

The Baumann method uses contact printing using silver salts and sulphuric acid. It is applicable to non-alloy and alloy steels and to cast irons of which the sulphur content is less than 0.1 %. Specifies general, principle, products and reagents, test pieces, procedure and test report.

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    • Standard
      3 pages
      English language
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    • Standard
      3 pages
      French language
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    • Standard
      3 pages
      French language

Macroscopic methods deal with non-metallic inclusions visible to the naked eye or with the aid of a magnifying glass with a magnification of not more than X 10. Only inclusions equal to or greater than 1 mm long are taken into consideration. Covers the blue fracture test method, the step machined test method, the magnetic particle inspection method.

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    • Standard
      6 pages
      English language
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    • Standard
      6 pages
      French language
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    • Standard
      6 pages
      French language