AWS IFS-02 pdf free download
AWS IFS-02 pdf free download.International Index of Welding Filler Metal Classifications.
For covered electrodes, the mechanical properties of the weld deposit are the means by which classifications are distinguished, with numbers assigned to represent the minimum tensile strength and, in many cases, the Charpy-V impact temperature. The usability of the electrode is defined by the two-digit numbers following the mechanical property designators, as shown in Table A2. Figure A 1 illustrates how these properties are distinguished by the WFM index number. The optional designators are not used in the WFM system but are shown since they appear in many specifications.
The solid wires for unalloyed steels used in submerged arc welding, gas shielded metal arc welding, and tungsten arc welding all have the initial“S” designator, as shown in Table Al. If similar products are furnished in metal cored tubular (composite) form, the initial designator is“C.”The following three digits define the manganese, carbon, and silicon contents, leaving the fourth digit available for microalloying or special deoxidizing elements such as titanium, aluminum, or zirconium.
The properties are in the as-welded condition unless the letter“P”is appended (not applicable to chromium- molybdenum steels where all properties are in the postweld heat treatment condition). In order to conform to the proposed ISO specifications with the“B” cohabitation designations, the type of core ingredients and the recommended application by which it is classified (positionality, shielding, and current) are defined by a designation familiar in the Americas and in many Pacific Rim countries. Table A3 provides the principal attributes of these designators.
The two attributes for classifying low alloy steel weld metals require tests not only for mechanical properties, as in unalloyed steels, but also for alloy composition. The WFM numbers incorporate both criteria in the designations: first, the mechanical properties as shown in Figures Al and A3, and subsequently the alloy composition. For solid low alloy steel wires, which are used for the several arc welding processes including submerged arc welding (SAW), gas metal arc welding (GMA W), and gas tungsten arc welding (GTAW), among others, the manganese, carbon and silicon levels are defined as shown in Figure A2, and the composition designator is appended. The WFM system adopts a principle devised recently for the B section of ISO co-habitation drafts. Unlike previous designation systems used in IFS: 1998, a new system was developed that makes use of the same designation for similar compositions in each filler metal form– electrodes, bare wire, flux cored wire, etc. Figure A4 illustrates the methods used in establishing this new designation system.
Unlike the unalloyed and low alloy steels, the highly alloyed filler metals, stainless steels and non-ferrous alloys are classified only by their compositions. For stainless steels, the first three digits are the commonly accepted base metal compositions, known worldwide by their American Iron and Steel Institute (AISI) designations, 308, 309, 316, 321, 347, 410, 430, etc. In IFS: 1998 a fourth digit that had been used for the modification of the three-digit symbols has now been abandoned in favor of the more familiar element symbols (Mo, Nb, Si, etc.) or other commonly used designators (L for low carbon, H for high carbon). These designators are consistently used for all forms of stainless steel filler metal, electrodes, bare wire and flux cored wire.AWS IFS-02 pdf download.
