As a full-service precision sheet metal fabricator, EVS Metal is able to offer many specialized manufacturing solutions in-house, under a single roof. One of these solutions is welding for metal fabrication — both aluminum and stainless steel — a capability that may at first glance seem simple: joining materials via the use of heat. But welding is actually quite complex, and skilled welders are generally required to attain several different types of certifications and/or endorsements in accordance with specific American Welding Society (AWS) standards.
Types of Welding Certifications and Endorsements
AWS D9.1M/D9.1:2012 Sheet Metal Welding Code: All EVS welders meet at least the minimum requirements of the general AWS code.
AWS D1.2, Structural Welding Code – Aluminum: This endorsement covers four specific welding subject areas: material and design, fabrication, inspection and qualification.
B2.1: The AWS specification for welding procedure and performance qualification.
There are many more endorsements available that allow specialists to perform certain types of welds. Our company makes a concerted effort to ensure that our welders are able to obtain the necessary training to take on any job that is presented to our company.
Specializations in Welding
Besides specific endorsements, there are also different types of welding for metal fabrication in which one can choose to specialize, such as spot and arc, both of which EVS Metal can provide. Each is useful in its own way:
Gantry- and platen-style spot welding (also known as RSW — resistive spot welding): a process in which two metal surfaces are joined by electric current resistance.
Arc welding, including TIG and MIG welding: TIG (tungsten, inert gas) welding utilizes a non-consumable tungsten electrode to produce the weld and argon or helium as a shield and is the preferred method of welding thin materials. TIG welding requires considerable skill and is a slower process than other forms of welding. MIG (metal, inert gas) welding utilizes a continuous wire feed as an electrode and an argon-based shielding gas (sometimes mixed with carbon dioxide) to produce the weld. As it’s semi-automated, MIG welding can be a faster process than others but isn’t appropriate for every application.
Additionally, there are near-constant advances being made in terms of welding technology — robotic welding for metal fabrication being one of the fastest-growing areas of specialty. Robotic welding completely automates the process, and although not the right solution for many jobs, the accuracy and speed can be difficult to match when used correctly.