AWS Specification for welding consumables designations for manual electrodes (AWS A5.1 and A5.5)

1.The prefix “E” designates arc-welding electrode.

2.The first two digits of four –digit numbers and the first three digits of five-digit numbers indicate minimum tensile strength.

E60XX:60,000 psi Minimum Tensile Strength

E70XX:70,000 psi Minimum Tensile Strength

E110XX:110,000 psi Minimum Tensile Strength

3.The next –to-last digit indicates position:

EXX0X, EXX1X: All positions

EXX2X: Flat position and horizontal fillets

4.The suffix (Example: EXXX-A1) indicates the approximate alloy in the weld deposit:

-A1	0.40-0.65% Mo
-B1	0.40-0.65% Cr, 0.40-0.65% Mo
-B2	1.00-1.50% Cr, 0.40-0.65% Mo
-B2L	1.00-1.50% Cr, 0.40-0.65% Mo
-B3	2.00-2.50% Cr, 0.90-1.20% Mo
-B3L	2.00-2.50% Cr, 0.90-1.20% Mo
-B4L	1.75-2.25% Cr, 0.40-0.65% Mo
-B5	0.40-0.60% Cr, 1.00-1.25% Mo, 0.05% V
-C1	2.00-2.75% Ni
-C1L	2.00-2.75% Ni
-C2	3.00-3.75% Ni
-C2L	3.00-3.75% Ni
-C3	0.80-1.10% Ni, 0.15% Cr, 0.35% Mo, 0.05% V
-NM	0.80-1.10% Ni, 0.05% Cr, 0.40-0.65% Mo, 0.02% V
-D1	0.25-0.45% Mo
-D2	0.25-0.45% Mo
-D3	0.40-0.65% Mo
-G	0.50% min Ni, 0.30% min Cr, 0.20% min Mo,0.10% min V (only one element required)
-M	(E9018-M) : 1.40-1.80% Ni, 0.15% Cr, 0.35% Mo,0.05% V (E10018-M): 1.40-2.10% Ni, 0.35% Cr, 0.25-0.50% Mo,0.05% V (E11018-M): 1.25-2.50% Ni, 0.40% Cr, 0.25-0.50% Mo,0.05% V (E12018-M): 1.75-2.50% Ni, 0.30-1.50% Cr, 0.30-0.55% Mo,0.05% V
-M1	3.00-3.80% Ni, 0.65% Cr, 0.20-0.30% Mo, 0.05% V
-W	(E7018-W) : 0.20-0.40% Ni, 0.15-0.30% Mo, 0.08% V (E8018-W) : 0.40-0.80% Ni, 0.45-0.70% Cr