79 Self-Shielded
Cored Wires Coreshield
40 AWS Class E70T-4
Code and Specification Data:
AWS A5.20, ASME SFA 5.20, CSA W48.5
Description: Coreshield
40 is a self-shielded flux cored wire primarily designed for multiple pass, horizontal
and flat position
welding of low and medium carbon steels when toughness is not a requirement. The
larger sizes achieve
very high deposit rates for very low joining costs. The low penetration, convex
fillet bead shape and ability
for the slag to desulfurize the deposit make it an ideal choice when crack resistance
is a primary consideration.
The flat position deposits are smooth and uniform with good wetting into the side
walls. The core
ingredients are carefully balanced to stabilize the droplet transfer, enhance
the ability to handle mill scale
and easily detach the slag for quick cleaning. Coreshield
40 is designed to operate on DCEP (electrode positive) with longer electrical
stickout. The longer
extension increases the deposit potential by preheating the wire. The percent
of the melt-off converted
to fumes, although higher than Dual Shield wires, is reasonably low and the fume
can be removed
at the source. Typical
Mechanical Properties As
Welded All Weld
Metal Held at
220°F (104°C) for
48 hrs. Yield
Strength, psi (MPa) 62,300
(430) Tensile
Strength, psi (MPa) 85,900
(593) %
Elongation in 2" (51 mm) 29
Continued on next page...
