AWS A4.5:2020 pdf download

AWS A4.5:2020 pdf download.Standard Methods for Classification Testing of Positional Capacity and Root Penetration of Welding Consumables in a Fillet Weld
1. Scope
1.1 This standard specifies the preparation and assessment of fillet weld test pieces for conformity assessment of posi- tional usability and root penetration requirements of arc welding consumables classification standards for welding non- alloy and fine grain steels, low alloy steels, stainless steels, and nickel base alloys. This standard does not specify acceptance requirements. 1.2 Units of Measurement. This standard makes use of both U.S. Customary Units and the International System of Units (SI). The measurements are not exact equivalents; therefore, each system must be used independently of the other without combining in any way when referring to weld metal properties. The specification A4.5M uses SI Units. The specification with the designation A4.5 uses U.S. Customary Units. The latter are shown within brackets [ ], in appropri- ate columns in tables and figures and in paragraphs. 1.3 Safety. Safety and health issues and concerns are beyond the scope of this standard and therefore are not addressed herein. Safety and health information is available from the following sources: American Welding Society: (1) ANSI Z49.1, Safety in Welding, Cutting, and Allied Processes (2) AWS Safety and Health Fact Sheets (3) Other safety and health information on the AWS website Material or Equipment Manufacturers: (1) Safety Data Sheets supplied by materials manufacturers (2) Operating Manuals supplied by equipment manufacturers Applicable Regulatory Agencies Work performed in accordance with this standard may involve the use of materials that have been deemed hazardous and may involve operations or equipment that may cause injury or death. This standard does not purport to address all safety and health risks that may be encountered. The user of this standard should establish an appropriate safety program to address such risks as well as to meet applicable regulatory requirements. ANSI Z49.1 should be considered when devel- oping the safety program.
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 smooth, 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 90° angle between the web and flange. The web and flange dimensions shall be in accordance with those given in the consumable classifi- cation standard. 5.2 The position of welding and conditions of welding shall be as prescribed in the consumable classification standard for the classification and size of consumable under test, and as defined in AWS A3.0M/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 [60°F]. For covered electrodes, at least one electrode (and as many more as the weld per- mits) shall be continuously consumed to within the permissible stub length of 50 mm [2 in]. For electrodes longer than 450 mm [18 in], designed specifically for use in gravity welding, the fillet weld may be 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.