What does the S stand for in ER70S-6 wire?

What does the S stand for in ER70S-6 wire?

• A. Soft
• B. Stainless
• C. Silver
• D. Solid

Answer: (D)

In this welding wire designation, the S tells you the wire is Solid. That means it’s a solid-core wire (not flux-core or tubular) and it relies on external shielding gas to protect the weld. The other letters in the code aren’t about softness, stainless, or silver—those aren’t used in this designation. This particular wire, ER70S-6, is a common solid MIG wire for mild steel, with 70 indicating the strength range and the -6 describing its deoxidizer chemistry.

In this welding wire designation, the S tells you the wire is Solid. That means it’s a solid-core wire (not flux-core or tubular) and it relies on external shielding gas to protect the weld. The other letters in the code aren’t about softness, stainless, or silver—those aren’t used in this designation. This particular wire, ER70S-6, is a common solid MIG wire for mild steel, with 70 indicating the strength range and the -6 describing its deoxidizer chemistry.