AWS A5.5 E9016-B3
Description: R406 is a pearlitic heat-resistant steel electrode with a low-hydrogen potassium coating containing 2.5% Cr - 1% Mo.Both AC and DC can be used, and can be welded in all positions. The weldment must be preheated to 160 ~ 200°C before welding. Application: Used for welding Cr2.5Mo pearlitic heat-resistant steel structures, such as high-temperature and high-pressure pipelines with operating temperatures below 550 ° C, synthetic chemical machinery, and petroleum cracking equipment. 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 |
| Rod diameter （mm） | 2.5 | 3.2 | 4.0 | 5.0 |
| Welding Current （A） | 60 ~ 90 | 90 ~ 120 | 140 ~ 180 | 170 ~ 210 |