©
COPYRIGHT 2000 THE ESAB GROUP, INC. LESSON
IV 4.4
AWS SPECIFICATION FOR LOW ALLOY ELECTRODES
A5.5-96
With very few exceptions, low alloy
electrodes are made by adding the appropriate alloying elements
to the electrode coating rather than having a core wire that matches the low alloy
steel. Low alloy covered electrodes
are classified according to the American Welding Society
filler metal specification A5.5-96.
This specification contains the mechanical property require-
EFFECTIVENESS OF MOISTURE RESISTANT
COATING - ATOM ARC 7018 ELECTRODES FIGURE
3 .40
.30 .20
.10 01
2
4 8
12
24 36
48 96
Exposure Time (hours)
1 2
4 8
12 24
36 48
96 Exposure
Time (hours) .40
.30 .20
.10 0
1 2
4 8
12 24
Exposure Time (hours)
.40 .30
.20 .10
0 Moisture
at Zero Hours
.09 Moisture at
Zero Hours .08
Moisture at Zero
Hours .10 70°F
- 70% Relative Humidity 80°F
- 80% Relative Humidity 90°F
- 90% Relative Humidity
