ER70S-6 is an AWS filler metal classification typically used for which combination?

Study for the AIT Welder 2nd Period Test. With flashcards and multiple choice questions, each question offers hints and explanations. Prepare confidently for your certification!

Multiple Choice

ER70S-6 is an AWS filler metal classification typically used for which combination?

Explanation:
ER70S-6 is the standard carbon-steel filler metal used for the MIG (GMAW) process. The 70 indicates a weld-metal tensile strength around 70 ksi, while the S shows it’s a solid wire. The “-6” designation signals a chemistry with higher deoxidizers (silicon and manganese) to improve performance on dirty, mill-scale, or rusty carbon steel and to reduce porosity. This combination makes it the typical choice for welding ordinary carbon steel with a shielding gas (like CO2 or a CO2/argon mix). It’s not intended for stainless steel, aluminum, or copper, which require different filler metals tailored to their specific alloys. So, for carbon steel welded with MIG, ER70S-6 is the standard option.

ER70S-6 is the standard carbon-steel filler metal used for the MIG (GMAW) process. The 70 indicates a weld-metal tensile strength around 70 ksi, while the S shows it’s a solid wire. The “-6” designation signals a chemistry with higher deoxidizers (silicon and manganese) to improve performance on dirty, mill-scale, or rusty carbon steel and to reduce porosity. This combination makes it the typical choice for welding ordinary carbon steel with a shielding gas (like CO2 or a CO2/argon mix). It’s not intended for stainless steel, aluminum, or copper, which require different filler metals tailored to their specific alloys. So, for carbon steel welded with MIG, ER70S-6 is the standard option.

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