28 Carbon-Molybdenum
(C-Mo) Wires Dual
Shield 7000-A1 AWS
Class E81T1-A1 Code
and Specification Data: AWS
A5.29, ASME SFA 5.29 Description:
Dual Shield 7000-A1 is an all-position
wire recommended for 1/2% Mo steels. It is used in the fabrication
and erection of boilers, pressure piping
and tubing and other pressure vessel applications. A
75% Ar/25% CO2 shielding gas mixture is recommended
to improve arc characteristics, increase wetting action,
decrease penetration, and provide easier arc control for out-of-position welding.
The weld metal analysis
is similar to an E7018-A1 low hydrogen electrode.
Shielding Gas: CO2
or Argon mixtures up to 75% Argon Typical
Mechanical Properties Stress-Relieved
1 hr. As
Welded @1150°F
(621°C) CO2
CO2
Yield Strength, psi (MPa)
82,460 (569)
82,500 (569)
Tensile Strength, psi (MPa)
92,000 (635)
93,500 (645)
% Elongation in 2" (51 mm)
22 26
% Reduction of Area
58 63
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