Welding Rod Number Meaning. E represents an electrode which means an electrical current causes the filler material to be deposited. The first two numbers refer to the tensile strength or how much stress the weld bead can withstand.
Measured in thousands of pounds per square inch. The first two numbers refer to the tensile strength or how much stress the weld bead can withstand. This value may or may not appear printed on the consumable.
Once you understand the numbering system you can learn a lot about the rod.
After that will come an H number which indicates how much hydrogen will be diffused when you use the rod. The electrode is made up of materials which are similar to that of the metals chosen to be welded. After that will come an H number which indicates how much hydrogen will be diffused when you use the rod. 1 Indicates in what welding positions it can be used.