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CLASSIFICATIONS: E71T-1C, T-1M, E71T-9C, T-9M per AWS A5.20,
ASME SFA 5.20
Select 712 is an improved E71T-1C, featuring lower spatter and fume
emissions than conventional products in this class. This electrode
is intended for single and multiple pass welding of carbon and certain
low alloy steels in all positions, particularly in the overhead
and vertical up positions. Select 712 is used where a minimum tensile
strength of 70,000 psi is required in the deposited weld metal.
APPLICATIONS: Incomparable weldability in all positions makes
Select 712 a good choice for general plate fabrication, structural
steel welding, shipbuilding, steel fabrication and any instance
where lower fume and spatter emissions are required. The reduced
spatter is especially attractive in those operations where painting
is performed immediately after welding.
DIAMETERS: .035", .045", .052", 1/16"
SHIELDING GAS: 100% CO2, 75-80% Ar/balance CO2, 35-50 cfh
WELDING POSITIONS: All positions
CHARACTERISTICS:
40% - 60% less fume than conventional electrodes in this class.
Spatter is virtually nonexistent.
Extremely smooth and stable transfer reduces noise.
Fast freezing slag improves productivity.
Performs optimally on 75-80% Ar/balance CO2.
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TYPICAL
MECHANICAL PROPERTIES
|
| |
CO2
|
75% Ar/ 25% CO2
|
| Ultimate Tensile Strength
(psi) |
81,500 |
86,200 |
| Yield Strength (psi) |
70,600 |
77,700 |
| Percent Elongation |
26 |
27 |
| CVN (ft-lb f)
@ 0° F |
74 |
80 |
| @
-20° F |
70 |
77 |
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TYPICAL
DEPOSIT COMPOSITION
|
| Wt% |
C |
Mn |
P |
S |
Si |
|
CO2
|
.02 |
1.16 |
.010 |
.010 |
.41 |
|
75 Ar/ 25 CO2
|
.03 |
1.36 |
.010 |
.010 |
.53 |
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TYPICAL WELDING PARAMETERS * |
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| Diam. |
Position |
Amps |
Volts |
WFS |
Amps |
Volts |
| 1/16" |
Flat |
350 |
29 |
300 |
150-400 |
22-34 |
| |
Overhead |
225 |
26 |
160 |
150-310 |
22-28 |
| |
Vertical up |
225 |
25 |
160 |
150-280 |
22-27 |
| .052" |
Flat |
300 |
28 |
360 |
100-330 |
19-32 |
| |
Overhead |
225 |
26 |
245 |
150-310 |
21-28 |
| |
Vertical up |
225 |
25 |
245 |
150-280 |
21-27 |
| .045" |
Flat |
250 |
28 |
282 |
100-300 |
21-32 |
| |
Overhead |
200 |
26 |
265 |
150-280 |
21-29 |
| |
Vertical up |
200 |
25 |
265 |
100-230 |
21-28 |
| .035" |
Flat |
200 |
27 |
600 |
125-250 |
21-30 |
| |
Overhead |
175 |
25 |
490 |
115-220 |
21-28 |
| |
Vertical up |
170 |
25 |
490 |
120-215 |
21-28 |
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* With CO2 shielding gas. For 75Ar/25CO2 decrease voltage by 1 to 1.5 volts.
Notice: The results reported are based upon testing of the product under controlled laboratory conditions in accordance with American Welding Society Standards. Actual use of the product may produce different results due to varying conditions. An example of such conditions would be electrode size, plate chemistry, environment, weldment design, fabrication methods, welding procedure and service requirements. Thus the results are not guarantees for use in the field. The manufacturer disclaims any warranty of merchantability or fitness for any particular purpose with respect to its products.
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