Welding Electrode Classifications Chart

 WELDING ELECTRODE  CLASSIFICATIONS

Mild Steel coated Electrodes

E7018-X

E	This indicates that this is an electrode.
70	This indicates how strong this electrode is when welded. PSI ( Tensile Strength).
1	Indicates  Welding  Positions.
8	Indicates the coating, Penetration and current types used.
X	This indicates that there are more requirements.

 

WELDING POSITIONS

1. 1F/Flate position - Usually groove welds, fillet welds only if welded like a ‘V’.

2. 2F/ Horizontal position - Fillet welds, welds on walls ( Travel is from side to side ).

3. 3F/ Vertical position – Welds on wells ( Travel is either up or down )

4. 4F/ Over Head  - Weld that needs to be done upside down.

CLASSIFICATION TABLE

CLASS	ELECTRODE COATING		PENETRATION	CURRENT TYPE
EXXX0	Cellulose , Sodium		Deep	DCEP
EXXX1	Cellulose, Potassium		Deep	AC, DCEP
EXXX2	Rutile , Sodium		Medium	AC, DCEN
EXXX3	Rutile, Potassium		Light	AC,DCEN,DCEP
EXXX4	Rutile, Iron powder		Medium	AC,DCEN,DCEP
EXXX5	Low Hydrogen, Sodium		Medium	DCEP
EXXX6	Low Hydrogen, Potassium		Medium	AC, DCEP
EXXX7	Iron Powder, Iron Oxide		Medium	AC, DCEN
EXXX8	Low Hydrogen, Iron Powder		Medium	AC, DCEP
EXXX9	Iron Oxide, Rutile, Potassium	Medium		AC,DCEN,DCEP

 

Min. Tensile Strength.

E60xx- 60,000 PSI

E70XX-70,000 PSI

PSI – Pound Force Per Square Inch.

                                                          

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