Lincoln Electric LN-15 - Manual

Surface Tension Transfer ® (STT ® )
NX-2.20 11/06
GOOD PENETRATION AND LOW HEAT
INPUT CONTROL
Ideal for welding on joints with open root, gaps, or on thin material with
no burnthrough.
REDUCED SPATTER AND FUMES
Current is controlled to achieve optimum metal transfer.
REDUCED COSTS
Ability to use 100% CO
2
or argon shielding gas blends with larger
diameter wires.
GOOD BEAD CONTROL AND FASTER
TRAVEL SPEEDS
Can replace GTAW in many applications without sacrificing appearance.
Surface Tension Transfer ®
(STT ® ) welding is a GMAW,
controlled short circuit transfer
process developed and
patented by The Lincoln
Electric Company.
Unlike standard CV GMAW
machines, the STT
® machine
has no voltage control knob.
STT
® uses current controls to
adjust the heat independent of wire
feed speed, so changes in electrode
extension do not affect heat. The STT
®
process makes welds that require low
heat input much easier without
overheating or burning through, and
distortion is minimized. Spatter and
fumes are reduced because the
electrode is not overheated–even with
larger diameter wires and 100% CO
2
shielding gas. This gas and wire
combination lowers consumable costs.
W A V E F O R M C O N T R O L T E C H N O L O G Y ®
P R O C E S S
a d v a n t a g e s
Patented. This product is protected by one or more of the following United States patents: 4,717,807;
4,897,523; 4,866,247; 4,835,360; 4,954,691; 4,972,064; 5,001,326; 5,003,154; 5,148,001; 5,961,863;
6,051,810; 6,160,241; 6,274,854; 6,172,233; 6,215,100; 6,204,478. The application of the STT process for
root pass pipe welding and wallpapering of industrial vessels with nickel alloy sheets are patented. The
application of processes marketed by other welding manufacturers that are similar to STT may infringe on
these patents: 5,676,857; 5,742,029; 5,981,906; 6,093,906.
Conventional CV short circuit transfer
using CO
2
and .045" solid wire.
STT ® using CO
2
and
.045" solid wire.