Welding Electrode Classification by American AWS-ASTM System -
E XX XX or E 60 1 2
E XXX XX or E 100 15
Letter E signifies that electrode is suitable for metal (electric) arc welding. XX/XXX
First two or three digits indicate minimum tensile strength of weld metal in thousands of pounds per sq. inch, e.g. 60,000 and 100,000 lbs/sq. inch. Other values of XX and XXX are 45, 70, 80, 90 and 120.
Last but one digit indicates the welding position. It can be represented by numbers like 1, 2 and 3 which indicate that welding can be carried out in any position, flat and horizontal positions, and flat position respectively.
Last digit which may be 0, 1, 2, 3, 5 or 6 tells about power (2): supply, type of covering, type of arc, penetration characteristics, etc.
(a) Electrode is meant for metal (electric) arc welding,
(b) It possesses a minimum tensile strength of 60,000 pounds per Square inch,
(c) It can weld satisfactorily in all positions,
(d) Electrode covering has a high titania (rutile) content, is bounded with sodium silicate, can be operated on DCSP or AC, produces medium penetration, heavy slag, a convex weld bead appearance and a medium quality weld deposition.
