In ER70S-3 designation, the letter S denotes short circuit transfer.

• A. True
• B. Spray transfer
• C. Solid wire
• D. False

Answer: (D)

Understanding ER70S-3 shows that its S does not describe how metal is transferred during welding. The S in this designation specifies the wire type for gas-shielded welding (solid steel wire used with shielding gas), not the transfer method. Short circuit transfer is a characteristic of how the weld metal transfers in the arc under certain process conditions (voltage, current, shielding gas), and that is not encoded in the filler-metal designation. The "-3" part, along with the S, conveys the wire’s chemical class and deoxidizer content, not the transfer mode. So the statement is not correct.