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Re: What does T-4 stands for?[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: seaoc(--nospam--at)seaoc.org
- Subject: Re: What does T-4 stands for?
- From: "Ron Hamburger" <roh(--nospam--at)eqe.com>
- Date: Mon, 30 Dec 1996 18:12:17 PST
- Priority: normal
On 12/30/96, Edward Li asked - What does T-4 stand for: Under the AWS specifications for welding electrodes, weld filler metals are assigned a classification. Flux Cored Arc Welding (FCAW) electrodes are specified under AWS specification A5.20. Under the classification of this system, electrodes are classified as: EXXTX The first X indicates the ultimate tensile strengths in 10 ksi increments. Thus - the 7 indicates 70 ksi minimum ultimate tensile strength. The second X indicates the primary welding position the electrode is approved for. A "0" indicates flat and horizontal welds A "1" all positions. The" T" indicates the FCAW process The final X describes individual useability and performance capabilities. Electordes with this final "X" equal to 1, 5, 6, and 8 have specific Charpy V-Notch toughness. Electrodes with a final X equal to 2, 4, 7, 10 and 11 do not. Note - that other characteristics are described by this designator as well. Thus - E70T-4 represents an electrode classification that deposits minium 70 ksi metal, approved for flat and horizontal welding, FCAW process, not rated for notch toughness. This and other valuable information that structural enigneers desigining steel should know may be found in FEMA-267 Interim Guidelines for Evaluation, Repair, Modification and Design of Steel Moment Resisting Frames. All SEAOC members were sent one of these early in 1996. Other interested parties can get one free by contacting FEMA at 1-800-480-2520 Ronald O. Hamburger Project Director for Product Development SAC Joint Venture
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