Which wire type has limited availability for collision repair welding?

• A. ER70S-2
• B. ER80S-6
• C. ER70S-6
• D. AWS ER70S-7

Answer: (D)

The situation in collision repair welding is that shops stock filler wires that cover the common automotive steels found in panels and structures, with ER70S-2 and ER70S-6 being typical choices because they weld well on painted, rusty, or dirty surfaces and are widely available. AWS ER70S-7 is a more specialized filler metal with a chemistry suited to particular welding conditions or types of steel, so auto-body distributors don’t stock it as broadly. That specialized use means it isn’t as readily found in many collision repair shops, giving it limited availability. The other options are more mainstream for the typical materials and conditions you encounter in auto body work.