Question

In regards to welding wire filler metals used in GMAW, What do the letters and numbers ER70S3 refer to ________.

Answer 1

The letters and numbers in ER70S3 refer to the classification of welding wire filler metals used in GMAW, including the tensile strength and chemical composition of the wire.

Step-by-step explanation:

The letters and numbers in ER70S3 refers to the classification of welding wire filler metals used in Gas Metal Arc Welding (GMAW). In this classification system, ER stands for Electrode Rod, 70 represents the minimum tensile strength in ksi, and S3 indicates the chemical composition and characteristics of the wire.

For example, ER70S3 indicates that the wire has a minimum tensile strength of 70,000 pounds per square inch (ksi) and possesses good performance in terms of crack tolerance and impact resistance.