ATOM ARC 7018-Mo
Atom Arc 7018-Mo is an all-position low hydrogen electrode recommended for welding low-alloy, high tensile steels and 0.5% Mo steels. This rod is ideal for fabrication and erection of boilers pressure piping and tubing and other pressure vessel applications.
Features
Atom Arc 7018-Mo electrodes contain 0.5% Mo as alloy addition. They are recommended for welding low-alloy, high tensile steels of 50 ksi (345 MPa) minimum yield strength and also 0.5% Molybdenum steels and pipes. They are widely employed in the fabrication and erection of boilers, pressure piping and tubing and other pressure vessel applications.
View large imageClassifications
Classifications/Approvals
- MIL-E-0022200/7 MIL-7018-A1
- A.B.S.- AWS A5.5; E7018-A1
Properties
| As Welded | |
|---|---|
| Yield Strength | 75 ksi, 515 MPa |
| Tensile Strength | 87 ksi, 600 MPa |
| Reduction of Area | 72 % |
| Elongation in 2" | 30 % |
| Stress Relieved 1 hr. @ 1150ºF (621ºC) | |
| Yield Strength | 74 ksi, 510 MPa |
| Tensile Strength | 86 ksi, 595 MPa |
| Reduction of Area | 72 % |
| Elongation in 2" | 30 % |
| Stress Relieved 8 hrs. @ 1150ºF (621ºC) | |
| Yield Strength | 73 ksi, 505 MPa |
| Tensile Strength | 84 ksi, 585 MPa |
| Reduction of Area | 74 % |
| Elongation in 2" | 30 % |
| Typical Charpy V-Notch Impact Properties | |
| Testing Temperature @ 72ºF (22ºC) | |
| As Welded | 98 ft.-lbs., 133 J |
| Stress Relieved 1 hr. @ 1150ºF (621ºC) | 98 ft.-lbs., 133 J |
| Testing Temperature @ 0ºF (-17ºC) | |
| As Welded | 70 ft.-lbs., 95 J |
| Stress Relieved 1 hr. @ 1150ºF (621ºC) | 68 ft.-lbs., 92 J |
| Testing Temperature @ -20ºF (-28ºC) | |
| As Welded | 68 ft.-lbs., 92 J |
| Stress Relieved 1 hr. @ 1150ºF (621ºC) | 52 ft.-lbs., 71 J |
| Typical Undiluted Weld Metal Analysis | |
| C | 0.04 % |
| Mn | 0.75 % |
| Si | 0.42 % |
| P | 0.017 % |
| S | 0.014 % |
| Mo | 0.53 % |
SAW
Accessories
Depositions
| Diameter | Optimal Amperage | Range Amperage | Deposition Rate | Efficiency |
|---|---|---|---|---|
| 3/32 in, 2.4 mm | 90 A | 70 - 100 | 1.7 lbs./hr., 0.8 kg./hr. | 66.3 % |
| 1/8 in, 3.2 mm | 120 A | 90 - 160 | 2.6 lbs./hr., 1.2 kg./hr. | 71.6 % |
| 140 A | 90 - 160 | 2.7 lbs./hr., 1.2 kg./hr. | 70.9 % | |
| 5/32 in, 4.0 mm | 140 A | 130 - 220 | 3.1 lbs./hr., 1.4 kg./hr. | 75 % |
| 170 A | 130 - 220 | 3.8 lbs./hr., 1.7 kg./hr. | 73.5 % | |
| 3/16 in, 4.8 mm | 200 A | 200 - 300 | 4.9 lbs./hr., 2.2 kg./hr. | 76.4 % |
| 250 A | 200 - 300 | 5.4 lbs./hr., 2.4 kg./hr. | 74.6 % | |
| 7/32 in, 5.6 mm | 250 A | 250 - 350 | 6.5 lbs./hr., 2.9 kg./hr. | 75 % |
| 300 A | 250 - 350 | 7.2 lbs./hr., 3.3 kg./hr. | 74 % | |
| 1/4 in, 6.4 mm | 300 A | 300 - 400 | 7.7 lbs./hr., 3.5 kg./hr. | 78 % |
| 350 A | 300 - 400 | 8.7 lbs./hr., 3.9 kg./hr. | 77 % |
Extra Info
Preheat should be used on hardenable steels to prevent the formation of a hard heat-affected zone. Preheat may also be required in welding heavy sections