©
COPYRIGHT 2000 THE ESAB GROUP, INC. LESSON
III 3.7.9
SUREWELD
70LA-2
(AWS E7016)
- This low hydrogen electrode has a special
lime covering that allows the electrode
to deposit trouble-free welds on difficult to weld steels,
such as high carbon, low alloy, sulfur
bearing free machining, and cold rolled steels. It is us-
able with high amperages with corresponding
high deposition rates making it more economi- cal
than conventional electrodes on heavy work. The electrodes must be kept
dry, and welding should
be performed using as short an arc as possible. Typical
mechanical properties of the weld metal are: Yield
Point - 69,500 psi Tensile
Strength - 79,000 psi Elongation
(2" Gauge) - 28% Reduction
of Area - 75% The
typical chemical composition of the weld metal is: Carbon
0.07% Manganese
0.09% Silicon
0.50% DEPOSITION
RATE DATA:
70LA-2*
Electrode Deposition
Diameter
Amperage
Efficiency,
% (Lbs/Hr.)
5/32" 140
70.5 3.01
160 69.1
3.24 190
66.0 3.61
3/16" 175
71.0 3.79
200 71.0
4.23 225
70.0 4.40
250 65.8
4.77 1/4"
250 74.5
5.93 275
74.1 6.42
300 73.2
6.78 350
71.5 7.58
*Note: Efficiencies do not include
stub loss
