AWS A4.5 pdf free download
AWS A4.5 pdf free download.Standard Methods for Classification Testing of Positional Capacity and Root Penetration of Welding Consumables in a Fillet Weld.
3. General Requirements
Samples of welding consumables (electrodes or wires) to be tested shall be representative of the manufacturer’s products being classified. Test pieces shall be prepared and tested as specified in Clauses 5. 6. and 7. as well as in the consumable classification standard. The test results shall fulfill the requirements of the classification standard.
4. Test Plate Material
The plate material shall be selected from the range of materials and material thicknesses prescribed by the consumable classification standard. The surfaces to be welded shall be free of scale, rust, and other contaminants.
5. Preparation of the Test Piece
5.1 Before assembling, the web piece of the assembly shall have one edge of the web flat and square throughout its length so that, when the web is set on the flange, which shall be straight and smx)th. there will be intimate contact along the entire length of the joint. The web and flange shall be assembled as shown in Figure 1. Both ends of the joint shall be secured by tack welds to maintain intimate contact along the length of the joint and to maintain the 90c angle between the web and flange. The web and flange dimensions shall be in accordance with those given in the consumable classification standard.
5.2 The position of welding and conditions of welding shall he as prescribed in the consumable classification standard for the classification and size of consumable under test, and as defined in AWS A3.OM/A3.0. A single pass fillet weld shall be deposited on one side of the joint for approximately the full length of the test piece. The minimum temperature of the assembly shall be 15°C [6(FFJ. For covered electrodes, at least one electrode (and as many more as the weld permits) shall be continuously consumed to within the permissible stub length of 50 mm 12 ml. For electrodes longer than 450 mm 118 ml. designed specifically for use in gravity welding, the fillet weld may he made either manually or with a device designed specifically for gravity welding. For wire electrodes, tubular cored electrodes, and wires, welding shall be continuous from start to finish of the fillet weld.
5.3 The fillet weld shall be deposited using travel speeds compatible with the consumable classification and tested to provide the fillet weld size required by the consumable classification standard.
5.4 If welding of the second side of the test piece is required by the consumable classification standard, the test piece shall be cooled to room temperature by any convenient means, before starting to weld the second side of the joint. If water is used as the coolant, care shall he taken that all water has been thoroughly removed from the joint before beginning welding on the second side.
6. Examination and Measurement of the Test Piece
6.1 The entire face of the completed filler weld shall he examined i’isual1 There shall be no indication of cracks tint! the weld shall be reasonably free of undercut. oi’erlap. trapped slag. and surface porosit.:
6.2 The comnpleredfilki weld 1e’st piece shall be measured per 11w classification standard. Two methods of inc’asureineizl offlilet weld size, leg length, and coni’exitv are prescribed in 6.3 and 6.4. If the classification .ctandard has requirements for fillet weld leg length and convexity in increments les.c than the calibrated accuracy of the gauge, the method of 6.3 imiusi be used.
6.3 Measurement by Cross Section. If fillet welds are required by the consumable classification standard on both sides of the test piece, then both fillet welds shall be measured Ofl the same macrosection.
6.3.1 For Lest plates welded with covered electrodes, where two or more electrodes are used, a macrosection. approximately 25 mm LI ml wide, shall be removed from a point approximately 25 mm 11 ml back from the crater end of the deposit made with the first electrode. For test plates welded with a continuous consumable or with only one covered electrode, a macrosecUon, approximately 25 mm 11 mi wide, shall be removed from approximately the midpoint of the weld length.AWS A4.5 pdf download.
