Atom Arc 8018-B6L deposits a low carbon 5% Cr - 0.5% Mo weld metal. This electrode is excellent for the petrochemical and petroleum industries where resistance to hydrogen attack is required.
Atom Arc 8018-B6L deposits a low carbon 5% Cr, 0.5% Mo weld metal. It is designed for welding ASTM A200-T5, A335-P5, A387-Gr5 and similar steels. Applications tend to be in the petrochemical and petroleum industries, especially where hydrogen attack accelerates metal failure. Additionally, these steels are used in pressure vessels and piping for high temperature service.

| Stress Relieved 1 hr. @ 1375ºF (746ºC) | |
|---|---|
| Yield Strength | 95 ksi, 655 MPa |
| Tensile Strength | 81 ksi, 558 MPa |
| Elongation | 25 % |
| Typical Undiluted Weld Metal Analysis | |
| C | 0.04 % |
| Mn | 0.6 % |
| Si | 0.6 % |
| P | 0.015 % |
| S | 0.011 % |
| Cr | 5.4 % |
| Mo | 0.6 % |
| 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 % |
The recommended preheat temperature for 5CrMo steels is 400-500°F depending on thickness. Post weld heat treatment is generally required.