AWS A5.5 E8016-B2
Description: R306 is a pearlitic heat-resistant steel electrode with a low-hydrogen potassium coating containing 1% Cr - 0.5% Mo. Both AC and DC can be used, and can be welded in all positions. The weldment must be preheated to 160 ~ 250°C before welding. Application: Used for welding Cr 1% - Mo 0.5% heat-resistant steel whose working temperature is below 520℃, such as boiler pipes, pressure vessels, vaporizers and petroleum refining equipment, etc. Chemical composition of weld metal(%):| C | Mn | Si | Cr | Mo | S | P |
| 0.05 ~ 0.12 | 0.50 ~ 0.90 | ≤0.60 | 0.80 ~ 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 | ≥17 | ≥47 |
| Rod diameter （mm） | 2.5 | 3.2 | 4.0 | 5.0 |
| Welding Current （A） | 60 ~ 90 | 90 ~ 130 | 140 ~ 180 | 180 ~ 210 |