Auster – SIFbronze

In the manual for an Auster in reference to the Tail Unit, it states:

“The tailplane is in two seperate sections, each having a welded steel tube framework with Sifbronze welded channel-section steel ribs”

what is the Sifbronze? I see from the internet that :

“Sifbronzing is an almost universally recognised way of describing the low temperature bronze welding of sheet steel, cast iron and other metals. The reason behind this fact summarises why Sifbronze, the company which first developed and promoted the technique, is generally considered to be a supplier of top-quality welding rods, wires, fluxes and equipment.”

The site further says:
“Over the years the nature of the company at Stowmarket has changed little beyond expanding to meet increased demand and keeping ahead of technology. During the Second World War most of the company`s efforts were devoted to war work, largely for the Royal Air Force. This included the production of ground equipment such as the bomb-trolleys which were a prominent feature of so many air stations. Sifbronze was used for, amongst many other military applications, the fabrication of air frames.”

In modern technical terms – what does this mean in connection with the Auster?

cheers