AWS A5.5 E9015-B3
Description: R407 is a pearlitic heat-resistant steel electrode with a low-hydrogen sodium coating containing 2.5% Cr - 1% Mo. Use DCEP (direct current electrode positive) and can welded in all positions. The weldment must be preheated to 200 ~ 300°C before welding. Application: Used for welding high-temperature and high-pressure pipelines with working temperature below 550°C, synthetic chemical machinery, petroleum cracking equipment, etc. Chemical composition of weld metal(%):| C | Mn | Si | Cr | Mo | S | P |
| 0.05 ~ 0.12 | 0.50 ~ 0.90 | ≤0.50 | 2.00 ~ 2.50 | 0.90 ~ 1.20 | ≤0.030 | ≤0.030 |
| Test item | Tensile strength Mpa | Yield strength Mpa | Elongation % | Impact value (J) Normal Temp. |
| Guaranteed | ≥590 | ≥490 | ≥15 | ≥47 |
| Tested | 600 ~ 680 | ≥500 | 18 ~ 21 |
| Rod diameter （mm） | 2.5 | 3.2 | 4.0 | 5.0 |
| Welding Current （A） | 60 ~ 90 | 90 ~ 120 | 140 ~ 180 | 170 ~ 210 |