Question

What does the "49" indicate in electrode designation E4918-X?

a) 49 MPa minimum tensile strength
b) 49,000 psi minimum yield strength
c) 490 MPa minimum tensile strength
d) 49,000 minimum tensile strength

Answer 1

The "49" in electrode designation E4918-X indicates a) 49 MPa minimum tensile strength.

Step-by-step explanation:

The "49" in electrode designation E4918-X indicates a) 49 MPa minimum tensile strength. Tensile strength is the maximum stress a material can withstand before breaking or fracturing. In this case, the electrode has a minimum tensile strength of 49 MPa, meaning it can withstand a force of 49 MegaPascals before breaking. The letter "E" in the designation signifies that this electrode is used for welding, while the numbers provide additional specifications like tensile strength.