Atom Arc 7018-SR
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
- Civil Construction
- Industrial and General Fabrication
- Mobile Equipment
- Power Generation
Welding Process
- SMAW/MMA (Stick)
Typical Charpy V-Notch Properties
| Impact Value | Testing Temperature | |||
| stress relieved | ||||
| 180 J (133 ft-lb) | 8 hr | 621 degC (1150 degF) | -29 degC (-20 degF) | |
| 250 J (185 ft-lb) | 16 hr | 621 degC (1150 degF) | -29 degC (-20 degF) | |
Typical Tensile Properties
| Condition | Stress Relieved | Stress Relieved | As Welded |
| Reduction in Area | 77 % | 76 % | 76 % |
| Tensile Strength | 510 MPa (74 ksi) | 520 MPa (76 ksi) | 575 MPa (83 ksi) |
| Yield Strength | 405 MPa (59 ksi) | 420 MPa (61 ksi) | 475 MPa (68 ksi) |
| Elongation | 35 % | 35 % | 32 % |
| Testing Time | 16 hr | 8 hr | |
| Testing Temperature | 621 degC (1150 degF) | 621 degC (1150 degF) |
Deposition Data
| Current | Deposition Rate | Diameter | Deposition Efficiency (%) | Optimal Amps |
| 130-220 A | 1.7 kg/h (3.8 lb/h) | 4.0 mm (5/32 in.) | 73.5 % | 170 A |
| 90-160 A | 1.2 kg/h (2.6 lb/h) | 3.2 mm (1/8 in.) | 71.6 % | 120 A |
| 200-300 A | 2.4 kg/h (5.4 lb/h) | 4.8 mm (3/16 in.) | 74.6 % | 250 A |
| 200-300 A | 2.2 kg/h (4.9 lb/h) | 4.8 mm (3/16 in.) | 76.4 % | 200 A |
| 70-100 A | 0.8 kg/h (1.7 lb/h) | 2.4 mm (3/32 in.) | 66.3 % | 90 A |
| 90-160 A | 1.2 kg/h (2.7 lb/h) | 3.2 mm (1/8 in.) | 70.9 % | 140 A |
| 130-220 A | 1.4 kg/h (3.1 lb/h) | 4.0 mm (5/32 in.) | 75 % | 140 A |
Classifications
| Classifications |
ASME SFA 5.1 : AWS A5.1 : E7018 H4R |
Consumable Characteristics
| Coating Type | Low-hydrogen iron powder |
| 0 | |
| Welding Current | AC or DC+ |
Typical Weld Metal Analysis %
| Typical Weld Metal Analysis % | ||||||||||||||
| C | Mn | Mo | P | S | Si | |||||||||
| 0.06 % | 1.30 % | 0.10 % | 0.014 % | 0.014 % | 0.30 % | |||||||||
| 0.10 % | 0.30 % | |||||||||||||
Part Numbers and Accessories
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