ER70S-6 is recommended for welding which condition?

ER70S-6 is recommended for welding which condition?

• A. Scaled or rusty carbon steel
• B. Aluminum
• C. Stainless steel
• D. Bright, clean carbon steel

Answer: (A)

ER70S-6 is designed with higher deoxidizers (silicon and manganese) that help remove oxygen from the weld pool and tolerate surface contaminants. That makes it the best choice when welding carbon steel that isn’t perfectly clean, such as steel with scale or rust. The extra deoxidizers help prevent porosity and allow the weld to wet and fuse properly even with that rust or scale present. It’s not chosen for aluminum or stainless steel, which need different filler metals, and it’s also well-suited for dirty or rusty carbon steel rather than bright, clean surfaces.

ER70S-6 is designed with higher deoxidizers (silicon and manganese) that help remove oxygen from the weld pool and tolerate surface contaminants. That makes it the best choice when welding carbon steel that isn’t perfectly clean, such as steel with scale or rust. The extra deoxidizers help prevent porosity and allow the weld to wet and fuse properly even with that rust or scale present. It’s not chosen for aluminum or stainless steel, which need different filler metals, and it’s also well-suited for dirty or rusty carbon steel rather than bright, clean surfaces.