ERCuSi-A Tests

Just a few pics from some recent TIG welding tests using ERCuSi-A alloy filler rod (Silicon Bronze) for welding mild steel together. While the Silicon Bronze has a lower tensile strength (50,000 PSI) compared to common “mild” steel ER70 S-2 filler (83,000 PSI) it should be fine for many non-structural applications. It also maintains it’s golden-coppery color when applying patina to the adjacent steel surfaces! Click on for the results…

the original weld

brushed/cleaned

blackened