AWS A5.5 E9015-B9
Description: R717 is a heat-resistant steel electrode with a low-hydrogen sodium coating containing 9% Cr - 1% Mo-V-Nb. Use DCEP (direct current electrode positive) and can welded in all positions. Due to the addition of a small amount of Nb and V, the deposited metal has excellent high temperature creep resistance. Application: It is used for welding superheated tubes and heads of high-temperature and high-pressure boilers, such as A213-T91/A335-P1 (T/P91), A387Cr, 91 and other heat-resistant steel structures. Chemical composition of weld metal(%):| C | Mn | Si | Cr | Mo | V | Ni |
| 0.08 ~ 0.13 | ≤1.20 | ≤0.30 | 8.0 ~ 10.5 | 0.85 ~ 1.20 | 0.15 ~ 0.30 | ≤0.80 |
| Nb | Cu | Al | N | S | P |
|
| 0.02 ~ 0.10 | ≤0.25 | ≤0.04 | 0.02 ~ 0.07 | ≤0.01 | ≤0.01 |
|
| Test item | Tensile strength Mpa | Yield strength Mpa | Elongation % |
| Guaranteed | ≥620 | ≥530 | ≥17 |
| Rod diameter （mm） | 2.5 | 3.2 | 4.0 | 5.0 |
| Welding Current （A） | 60 ~ 90 | 90 ~ 120 | 130 ~ 170 | 170 ~ 210 |