Solid Welding Wire
1. The system for identifying the electrode classifications in this specification follows the standard pattern used in other AWS filler metal specifications as shownin Fig. A1.
2. The prefix “E” designates an electrode as inother specifications. The letters “ER” indicate that the filler metal may be used either as an electrode or a rod.
For A5.18, the number 70 indicates the required minimum tensile strength, as a multiple of 1000 psi, of the weld metal in a test weld made in accordance with specification
A5.18. Similarly, for A5.18M, the number 48 indicates the required minimum tensile strength, as a multiple of 10 MPa, of the weld metal in a test weld made in accordance with specification A5.18M.The letter “S” designates a solid electrode or rod.
The letter “C” designates a composite electrode. The digit following the hyphen, 2, 3, 4, 6, 7, G, or GS, indicates the chemical composition and/or impact testing requirements specified in Tables 1 through 5.In the case of some composite stranded and metal cored
electrodes, the letter “M” or “C” will follow, indicating the type of shielding gas.