AWS A5.5 E8018-B2
Description: R306Fe is a pearlitic heat-resistant steel electrode with iron powder and low hydrogen potassium type coating containing 1% Cr - 0.5% Mo. Both AC and DC can be used, and can be welded in all positions with short arc operation. The preheating of the weldment and the interlayer temperature are 160 ~ 250 °C during welding. Application: Used for welding of 1%Cr - 0.5%Mo pearlitic heat-resistant steel (such as 15CrMo), such as boiler heating surface pipes with working temperature below 550°C, steam pipes and pressure vessels with working temperature below 520°C, etc. It can be used for welding of 30CrMnSi steel castings. Chemical composition of weld metal(%):| C | Mn | Si | Cr | Mo | S | P |
| 0.05 ~ 0.12 | 0.50 ~ 0.90 | ≤0.50 | 1.00 ~ 1.50 | 0.40 ~ 0.65 | ≤0.030 | ≤0.030 |
| Test item | Tensile strength Mpa | Yield strength Mpa | Elongation % | Impact value (J) Normal Temp. |
| Guaranteed | ≥540 | ≥440 | ≥47 | ≥27 |
| Tested | 550 ~ 640 | ≥450 | 20 ~ 28 | 105 ~ 150 |
| Rod diameter （mm） | 3.2 | 4.0 | 5.0 |
| Welding Current （A） | 100 ~ 130 | 140 ~ 180 | 180 ~ 210 |