ATOM ARC 7018-M
Atom Arc 7018-M is an E7018M all-position low hydrogen electrode specially formulated to meet the more stringent requirements of Military Specification MIL-E-0022200/10.
Features
Atom Arc 7018-M is an all-position low hydrogen electrode specially formulated to meet the more stringent requirements of Military Specification MIL-E-0022200/10 for mechanical properties, coating moisture and diffusible hydrogen content. Atom Arc 7018-M was intended for welding carbon steels, as well as high tensile steels, such as Grade HT of MIL-S-16113 and MIL-S-22698. It is also used for attachment welds to HY-80 and HY-100.
View large imageClassifications
Classifications/Approvals
- AWS A5.1; E7018M
- A.B.S.- 3,3Y(H5)
- QPL-22200/10; MIL-7018-M
- ASME SFA 5.1
Properties
| As Welded | |
|---|---|
| Yield Strength | 69 ksi, 475 MPa |
| Tensile Strength | 80 ksi, 550 MPa |
| Elongation in 2" | 30 % |
| Reduction in Area | 72 % |
| Stress Relieved 1 hr. @ 1150ºF (621ºC) | |
| Yield Strength | 57 ksi, 395 MPa |
| Tensile Strength | 71 ksi, 490 MPa |
| Reduction in Area | 76 % |
| Elongation in 2" | 36 % |
| Typical Charpy V-Notch Impact Properties | |
| Testing Temperature -20ºF (-29ºC) | |
| As Welded | 114 ft.-lbs., 155 J |
| Stress Relieved 1 hr. @ 1150ºF (621ºC) | 166 ft.-lbs., 225 J |
| Typical Undiluted Weld Metal Analysis | |
| C | 0.04 % |
| Mn | 1.0 % |
| Si | 0.3 % |
| P | 0.013 % |
| S | 0.013 % |
| Mo | 0.1 % |
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 is generally not required with Atom Arc 7018-M to prevent underbead cracking. Preheat should be used with hardenable steels to prevent the formation of hard heat-affected zones and eliminate tendencies toward quench cracking on cooling. Preheat may also be required in welding heavy sections.