ISO 4968:2022
Steel — Macrographic examination by sulphur print (Baumann method)
This document specifies a method (Baumann) for the macrographic examination of steel by means of contact printing using silver salts and acid.
The method is applicable to steels of which the sulphur content is less than 0,40 %. This method can also be applied to cast irons.
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 General
5 Principle and aim of the test
6 Test paper and reagents
6.1 Photographic paper
6.2 Reagents
7 Fixing solution
8 Test piece
9 Sampling
10 Machining
11 Procedure
12 Test report
Annex A (informative) Classification of sulphur print test results
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 General
5 Principle and aim of the test
6 Test paper and reagents
6.1 Photographic paper
6.2 Reagents
7 Fixing solution
8 Test piece
9 Sampling
10 Machining
11 Procedure
12 Test report
Annex A (informative) Classification of sulphur print test results