©
COPYRIGHT 2000 THE ESAB GROUP, INC. LESSON
IV Typical
Mechanical Properties
of Weld
Metal As
Welded*
Stress-Relieved*
Yield Point, psi
73,500 71,000
Tensile Strength, psi
84,000 81,000
% Elongation (2")
30 30
Charpy V-Notch Impact
@72°F. 95
ft.-lbs. 95 ft.-lbs.
@-10°F. 85
ft.-lbs. 85 ft.-lbs.
@-40°F. 70
ft.-lbs. 70 ft.-lbs.
Typical
Chemical Composition
of Weld
Metal C
Mn Ni
0.04% 1.06%
2.37% 4.6.3
Atom
Arc 8018N
(AWS E8018-C2)
- 8018N electrodes with 3% nickel are usually
used to weld 3% nickel steels for low
temperature service. It has solved many weld cracking
problems by its weld crack resistance,
as well as remaining tough at temperatures as low as - 100°F.
Typical applications include: welding of piping for low temperature
service, carbon and low
alloy steel forgings and ferritic steel castings for high pressures at low temperatures,
high strength
steel castings for structural purposes, carbon steel forgings for railroad use
and concrete reinforcement
bars. Typical
Mechanical Properties
of Weld
Metal As
Welded Stress-Relieved
Yield Point, psi
83,000 80,500
Tensile Strength, psi
94,000 90,500
% Elongation (2")
25 28
% Reduction of Area
55 74
Charpy V-Notch Impacts
@72°F. 110
ft.-lbs. 112 ft.-lbs.
@0°F. 91
ft.-lbs. 93 ft.-lbs.
@-40°F.
73 ft.-lbs. 63
ft.-lbs. @-100°F.
35 ft-lbs. 30
ft.-lbs. Typical
Chemical Composition
of Weld
Metal C
Mn Si
Ni 0.5%
0.84% 0.37%
3.30%
