Welding Rods

E

70

1

8

Electrode

Tensile Strength

Position

Type of Coating and Current

 

Letter    Consumable
E Electrode

 

Digit     Tensile Strength
60 60,000 psi tensile strength
70 70,000 psi tensile strength
80 80,000 psi tensile strength
90 90,000 psi tensile strength
100 100,000 psi tensile strength
110 110,000 psi tensile strength

 

Digit     Position  
1 All positions
2 Flat and Horizontal positions
4 Flat, horizontal, vertical down and overhead

 

Digit     Coating Welding Current
0 High cellulose sodium DC+
1 High cellulose potassium AC, DC+ or DC-
2 High titania sodium AC, DC-
3 High titania potassium AC, DC+
4 Iron powder, titania AC, DC+ or DC-
5 Low hydrogen sodium DC+
6 Low hydrogen potassium AC, DC+
7 High iron oxide, iron powder AC, DC+ or DC-
8 Low hydrogen potassium, iron powder AC, DC+ or DC-

 

Most common welding rods are E6010, E6011, E7018,

Storage of Low Hydrogen Rods according to AWS D1.3 1.4.4.2

  • Low Hydrogen rods end with a prefix of 5,6, or 8
  • ANSI/AWS A5.1 requires low hydrogen rods shall be purchased in a hermetically sealed container or be dried for two hours at a temperature of 500F-800F before welding
  • ANSI/AWS A5.5 requires low hydrogen rods shall be purchased in a hermetically sealed container or be dried for one hour at a temperature of 700F-800F before welding
  • Welding rods need to be placed and stored in an oven with a temperature of at least 250F when removed from hermetically sealed container
  • After 4 hours of exposure, E70XX or E70XX-X welding rods need to be redried (temperature varies according to conforming rules)
  • After 2 hours of exposure, E80XX or E80XX-X welding rods need to be redried (temperature varies according to conforming rules)
  • Welding rods which have been wet would no longer qualify as low hydrogen rods and shall not be used.