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LR publishes Wire-Arc Additive Manufacturing guidance notes.

Global Additive Manufacturing (AM) certification experts Lloyd’s Register (LR) has published guidance notes for the certification of consumables for Wire-Arc Additive Manufacturing (WAAM).

The WAAM guidance notes provide manufacturer information and product details, an overview of the process regarding works inspection, and highlights what is required during examination and testing.

Currently used in the marine, aerospace and defence, automotive, industrial and chemical industries, WAAM is an AM technique often used to build medium to large components with low to average complexity, including bridges, small vessels, propellers and crane hooks.

LR’s Lead Specialist, David Hardacre said: “Due to more flexibility in size and speed of printing, the use of WAAM is increasing, as is AM in general. It’s also relatively cheaper – existing welding robots are able to be transformed into AM printing robotics. While USA, Germany and China have been leading the way in terms of AM adoption to date, we’re now seeing interest from businesses in other countries as they consider WAAM printing for R&D as well as for commercial enterprises.”

Other benefits of WAAM include being able to build freeform without an enclosed chamber, a higher deposition rate, the lower cost of wire feedstock compared with metallic powder and additional cost savings on equipment required compared to other AM techniques.

As WAAM increases in popularity, LR has seen a rise in the number of projects currently underway or being considered, around the world. 

David adds: “LR is actively working with WAAM projects in UK, Australia and Brazil and we’re in discussions with organisations in Japan, Singapore, Germany, Belgium, Denmark and Spain. WAAM use is also growing in USA and Middle East, predominantly driven by the oil & gas industry.”

Find out more about LR’s Additive Manufacturing capabilities.

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