©
COPYRIGHT 2000 THE ESAB GROUP, INC. LESSON
IV 4.6.4
Atom
Arc 8018CM
(AWS E8018-B2)
- This 1-1/4% chrome, 1/2% moly electrode
deposits weld metal that retains high
strength at temperatures up to 600°F. The 8018CM
electrodes are used to weld the 1/2%
chrome-1/2% moly, 1% chrome-1/2% moly steels, as well
as the 1-1/4% chrome-1/2% moly power piping, boiler tubing, plates and castings.
Many of
the fossil fired steam boilers in electric generating plants in the United States
have been welded
with this electrode and its relative 9018CM. Typical
Mechanical Properties
of Weld
Metal Stress-Relieved
Stress-Relieved
8
hrs.
@1150°F.
8
hrs.
@1350°F.
Yield Point, psi
82,400 63,800
Tensile Strength, psi
100,000 78,300
% Elongation (2")
23 32
% Reduction of Area
60.7 79.1
Charpy V-Notch Impacts
@30°F. 64
ft.-lbs. 127 ft-lbs.
Typical
Chemical Composition
of Weld
Metal C
Mn Si
Ni Mo
0.06% 1.10%
0.40% 1.00%
0.50% 4.6.5
Atom
Arc 8018W
(AWS E8018-G)
- The balanced alloy combination of chromium,
nickel and copper of this electrode
causes the weld metal to "weather" similarly to the weathering
grade steels when exposed to the atmosphere. The inform color blend of this
weld metal with
the weathered steel makes these electrodes the ideal choice when architectural
appearance and weld integrity is important.
Typical
Mechanical Properties
of Weld
Metal Stress-Relieved
As Welded 1
hr.
@1025°F.
Yield Point, psi
84,600 79,100
Tensile Strength, psi
94,400 90,100
% Elongation (2")
27 28
% Reduction of Area
68.8 72.3
Charpy V-Notch Impacts
@-60°F.
63 ft-lbs. 44
ft.-lbs. Typical
Chemical Composition
of Weld
Metal C
Mn Si
Ni Mo
0.05% 1.11%
0.32% 1.70%
0.28%
