|
CLASSIFICATIONS: E71T-1M, E71T-9M per AWS A5.20,
E71T-1, E71T-9 per ASME SFA 5.20, MIL-71T-1 HYM per MIL-E-24403/1
APPROVALS: ABS 3SA, 3YSA; MIL-71T-1-HYM
Select 721 is a new E71T-1M electrode designed to conform to MIL-71T-1-HYM
per Mil-E-24403/1, with the added capability of being used with
argon/carbon dioxide blends of up to 95% argon. This electrode is
approved and listed on the Navy QPL.
APPLICATIONS: Although Select 721 was designed with Naval
shipbuilding in mind, it is well suited to many other applications
such as commercial shipbuilding, general steel fabrication, construction
and farm equipment, structural steel and pressure vessel fabrication.
DIAMETERS: .035", .045", .052", 1/16"
SHIELDING GAS: 75%Ar/25%CO2, 35-50 cfh
WELDING POSITIONS: All positions
CHARACTERISTICS:
Outstanding welder appeal.
Low fume generation rates and spatter.
Good CVN toughness to -20° F.
Diffusible hydrogen levels within MIL spec of 5 ml/100 gr of weld
metal.
|
TYPICAL
MECHANICAL PROPERTIES
|
| Ultimate Tensile Strength
(psi) |
78,100 |
| Yield Strength (psi) |
66,800 |
| Percent Elongation |
30.6 |
| CVN (ft-lb f)
@ -20° F |
50 |
|
|
TYPICAL
DEPOSIT COMPOSITION
|
| Wt% |
C |
Mn |
P |
S |
Si |
Ni |
|
|
.06 |
1.09 |
.006 |
.007 |
.33 |
.44 |
|
RECOMMENDED WELDING PARAMETERS |
|
| Diam. |
Position |
Amps |
Volts |
WFS |
Amps |
Volts |
| 1/16" |
Flat |
330 |
28 |
330 |
150-400 |
22-34 |
| |
Overhead |
225 |
25 |
180 |
150-310 |
22-28 |
| |
Vertical Up |
225 |
24 |
180 |
150-280 |
22-27 |
| .052" |
Flat |
275 |
27 |
400 |
140-330 |
19-32 |
| |
Overhead |
200 |
25 |
245 |
150-290 |
21-28 |
| |
Vertical Up |
200 |
24 |
245 |
140-270 |
21-27 |
| .045" |
Flat |
250 |
27 |
450 |
130-300 |
21-32 |
| |
Overhead |
190 |
25 |
305 |
150-280 |
21-30 |
| |
Vertical Up |
190 |
24 |
305 |
130-260 |
21-29 |
| .035" |
Flat |
200 |
26 |
600 |
125-250 |
21-30 |
| |
Overhead |
175 |
24 |
490 |
115-220 |
21-28 |
| |
Vertical Up |
170 |
24 |
450 |
120-215 |
21-28 |
|
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.
|
