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CLASSIFICATIONS: E71T-1C, T-1M, E71T-9C, E71T-9M, E71T-12C,
T-12M per AWS A5.20,
ASME SFA 5.20, MIL-71T-1, HYC, HYM and
MIL-71T-1C per
MIL-E-24403/1
APPROVALS: ABS 3SA-3YSA, Lloyd’s 3S, 3YS, DNV 3 YMS, CWB E491T-9, 9M-H8
Select 720 is a flux cored electrode intended for single and multiple
pass welding of carbon steels in all positions. The preferred shielding
gas is carbon dioxide; the use of 70-80 percent argon/balance carbon
dioxide may produce somewhat higher tensile strength with no significant
difference in CVN toughness.
APPLICATIONS: Select 720 is an ideal choice for those weldments
requiring good CVN toughness and high welder appeal when joining
steels such as ASTM A36, A515 Gr 70, A516 Gr 70 and other fine grained
steels. Such applications are found in shipbuilding, offshore drilling
structures, structural welds and general plate fabrication.
DIAMETERS: .035", .045", .052", 1/16"
SHIELDING GAS: 100% CO2, 75-80% Ar/balance CO2,
35-50 cfh
WELDING POSITIONS: All positions
CHARACTERISTICS:
Superb welder appeal in all position weldments.
Minimal spatter and low fume emission.
Smooth spray transfer with fast freezing slag.
Superior CVN toughness at certain subzero temperatures.
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TYPICAL
MECHANICAL PROPERTIES
|
| |
CO2
|
75% Ar/ 25% CO2
|
| Ultimate Tensile Strength
(psi) |
84,000 |
88,100 |
| Yield Strength (psi) |
77,000 |
78,900 |
| Percent Elongation |
28 |
27 |
| CVN (ft-lb f)
@ 0° F |
108 |
99 |
| @
-20° F |
101 |
88 |
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TYPICAL
DEPOSIT COMPOSITION
|
| Wt% |
C |
Mn |
P |
S |
Si |
|
CO2
|
.05 |
1.25 |
.008 |
.010 |
.50 |
|
75 Ar/ 25 CO2
|
.05 |
1.39 |
.008 |
.009 |
.56 |
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TYPICAL WELDING PARAMETERS *
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| Optimum |
Range |
| 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 |
175 |
26 |
511 |
100-250 |
21-30 |
| |
Overhead |
150 |
24 |
490 |
100-175 |
21-26 |
| |
Vertical Up |
150 |
24 |
490 |
100-175 |
21-26 |
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* With CO2 shielding gas. For 75% Ar/25% CO2 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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