Atom Arc 8018 electrodes deposit 1% Ni weld metal. It is used primarily to weld high-tensile steels, especially where notch toughness at low temperatures is required.
Atom Arc 8018 electrodes deposit 1% Ni weld metal. They are used primarily to weld high-tensile steels in the 70-80 ksi (483-552 MPa) tensile strength range, especially where notch toughness at temperatures as low as -40°F (-40°C) is required.

| As Welded | |
|---|---|
| Yield Strength | 74 ksi, 510 MPa |
| Tensile Strength | 85 ksi, 585 MPa |
| Elongation in 2" | 30 % |
| Stress Relieved 8 hrs. @ 1150ºF (621ºC) | |
| Yield Strength | 70 ksi, 485 MPa |
| Tensile Strength | 81 ksi, 560 MPa |
| Elongation in 2" | 30 % |
| Typical Charpy V-Notch Impact Properties | |
| Testing Temperature -20ºF (-29ºC) | |
| As Welded | 124 ft.-lbs., 168 J |
| Stress Relieved 8 hrs. @ 1150ºF (621ºC) | 129 ft.-lbs., 175 J |
| Testing Temperature -40ºF (-40ºC) | |
| As Welded | 114 ft.-lbs., 154 J |
| Stress Relieved 8 hrs. @ 1150ºF (621ºC) | 115 ft.-lbs., 156 J |
| Typical Undiluted Weld Metal Analysis | |
| C | .046 % |
| Mn | 1.11 % |
| Si | .33 % |
| P | 0.014 % |
| S | .010 % |
| Ni | .97 % |
| Mo | .12 % |
| Part No. | Model / Product Description | UPC |
|---|---|---|
| 255041410 | AA 8018 1/4X18X50#HS | 662303017026 |
| 255041816 | AA 8018 1/8X14X50#HS | 662303017040 |
| 255043119 | AA 8018 3/16X14X50#HS | 662303017071 |
| 255045312 | AA 8018 5/32X14X50#HS | 662303017118 |
| 255047318 | AA 8018 7/32X18X50#HS | 662303017149 |
| 255047342 | AA 8018 3/32X14X50#HS | 662303017156 |
| 255041824 | AA 8018 1/8X14X10#HS | 662303017057 |
| 255043127 | AA 8018 3/16X14X10#HS | 662303017088 |
| 255045320 | AA 8018 5/32X14X10#HS | 662303017125 |
| 255047359 | AA 8018 3/32X14X10#HS | 662303017163 |
| 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 % |
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
All listed prices are in U.S. dollars and represent the Manufacturer's Suggested Retail Price (MSRP) for sale in the United States. Actual selling price will be determined by the Distributor. Prices are subject to change without notice.