Atom Arc 7018-SR is an all-position low hydrogen electrode. The moisture resistance and welder appeal is similar to other Atom Arc electrodes. Atom Arc 7018-SR was developed to maintain 70 ksi (483 MPa) tensile strength after 16 hours stress relieving.
Industries
- Mobile Equipment
- Power Generation
- Civil Construction
- Industrial and General Fabrication
Welding Process
- SMAW/MMA (Stick)
Typical Tensile Properties
| Condition | Elongation | Reduction in Area | Tensile Strength | Testing Temperature | Testing Time | Yield Strength |
| Stress Relieved | 35 % | 77 % | 74 ksi | 1150 °F | 16 hr | 59 ksi |
| Stress Relieved | 35 % | 76 % | 76 ksi | 1150 °F | 8 hr | 61 ksi |
| As Welded | 32 % | 76 % | 83 ksi | - | - | 68 ksi |
Typical Charpy V-Notch Properties
| Condition | Impact Value | Testing Temperature | Stress Relieved Testing Temp | Stress Relieved Testing Time |
| As Welded | 114 ft-lb | -20 °F | - | - |
| Stress Relieved | 133 ft-lb | -20 °F | 1150 °F | 8 hr |
| Stress Relieved | 185 ft-lb | -20 °F | 1150 °F | 16 hr |
Typical Weld Metal Analysis %
| weld metal analysis | |||||
| P | Mn | Mo | C | S | Si |
| 0.014 % | 1.30 % | 0.10 % | 0.06 % | 0.014 % | 0.30 % |
| Classifications: | ASME SFA 5.1; AWS A5.1; E7018 H4R |
| Coating Type: | Low-hydrogen iron powder |
| CTOD-Tested: | False |
| Welding Current: | AC or DC+ |