IIW History 1948-1958

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Another important part of the Sub-Commission's activity has been the study of specifications for filler metals for braze welding. The results of its work are contained in bvo documents which were also approved by the Governing Council at Madrid and recommended for publication . In the document entitled Spec1;– /ications for determ1;ning the characteristics of the deposited metal are laid clown the conditions fo r determining the t ensile strength and the elongation of the deposited metal, whi le in that called Specifications ior determining the strength of the bo·11d on steel, cast iron and other metals are defined the conditions for measuring the bond strength of a given filler metal on st eel, cast iron and various alloys. Finally, at its session at Essen in 1957 the Governing Council approved and recommended fo r publication two documents on building-up : the Definition of building u.p (s·urfacing) and the Code of symbols for fill er rnetals for surfacing by gas. This Code of symbols is based on the use of three groups of symbols defining, for a given filler metal for surfacing, the general properties (purpose, hardness, machining process), the operational method (method of laying the deposit, treatment after deposit) a nd the composition of the filler metal. C. Sub-Commission B « Oxygen Cutting » . The Sub-Commission started ·work in March 1956 by carrying out a general investigation on the use and practice of oxygen cutting. The information supplied by twelve member countries showed that both manual and machine oxygen cutting are, on the whole, used practically t o the same extent a nd in the same way in countries represented on the Commission (France, Germany, Belgium, No rway, United Kingdom, Sweden). A more detailed examination of the regu– lation , recommendations and codes of practice showed that official indications or specifications d :cl not exist in any country but that, in certain countries, gene– ral codes of practice made some allusion to oxygen cutting. The Sub-Commi sion therefore put on its agenda the preparation of a code of practice for oxyo-en cutting and it hopes, at the 1958 annual assembly, t o submit to the plenary Commi sion a document containing its proposals. The Sub-Commission has also studied the t erminology used in the different countries and has not ed certain anomalies. For this and other reasons it has put on its agenda the prepat ation of a list of English and French terms used in oxygen cutting which will, after approval by the plenary Commission, be sub– mitted t o Commission YI (Te rminology). D. Sub-Commission C « Metallisation by Metal Spraying » and Working Groups «Compatibility Tests» and « Oxy-acetylene welding methods» . As this Sub-Commission and these \Vorking Groups have only just been established, there a re as yet no reports avail able about their \York. 4. WORK IN HAND. A. The Commission as a whole. The Commission is d iscussing the last draft of the specification Tests fO'I' the suitability of a steel ft"ll er 1•od for the base (parent) metal (r). It will probably be possible to forward t his document t o ISO after the next meeting at Vienna when the second series of t est s unde rtaken by the vVorking Group« Compatibi– lity Test s » will have been completed. The purpose of these test s is t o check the validity of the proposals concerning the operational method , the shape of testpieces, etc., defined in the document mentioned above.

( 1) Docu111e11t I -53-51 .