E9015-B91 ISO E6215-9C1MV Welding Rod (CHH717)
E9015-B91 welding rod is one kind of martensitic heat-resisting low alloy welding rod and it is mainly used for welding structures of supercritical steam turbine that fabricated by ZG1Cr10MoVNbN heat-resisting low alloy steel. Also, it is used for welding pipes made by T91 or P91 heat-resisting low alloy steel.
Type of Covering: Low hydrogen, sodium
Welding Position: F, H, HF, OH, V
Type of Current: DCEP
Notice:
- The rod should be baked at 350℃ for 1 hour before use.
- The surfaces to be welded must be cleaned away impurities, such as oil contamination, rust, moisture and so on.
- Short arc and narrow-gap welding is recommended.
- The base metal should be preheated to 200℃ – 315℃ before welding and in welding the interpass temperature should be 200℃-315℃ also.
- PWHT: After welding the weldment must be cooled to ＜100℃ in nature condition then it should be heated to 760℃ at a rate of 100℃-150℃/h, after that hold the temperature 2 hours and furnace cool it to 400℃, finally take it out from the furnace and air cool to ambient.
E9015-B91 Chemical Composition of Deposited Metal (%)
| C | Mn | Si | S | P | Ni | Cr | Mo | V | Nb | N | Cu | AI | Mn+Ni | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Standard | 0.08-0.13 | ≤1.25 | ≤0.30 | ≤0.01 | ≤0.01 | ≤1.0 | 8.0-10.50 | 0.85-1.20 | 0.15-0.30 | 0.02-0.10 | 0.02-0.07 | ≤0.25 | ≤0.04 | ≤1.40 |
| Typical | 0.09 | 0.60 | 0.22 | 0.006 | 0.009 | 0.66 | 9.20 | 0.95 | 0.20 | 0.04 | 0.03 | 0.02 | 0.004 | 1.26 |
Mechanical Properties of Deposited Metal (PWHT 760℃±15℃x2h)
| Tensile Strength Rm (MPa) | Yield Strength ReL/Rp0.2 (MPa) | Elongation A4 (%) | 20℃ Impact Value (J) | |
|---|---|---|---|---|
| Standard | ≥620 | ≥530 | ≥15 | ≥27 |
| Typical | 720 | 620 | 20 | 60 |
Sizes & Recommended Current (DC+)
| E9015-B91 Welding Rod Diameter (mm) | 2.5 | 3.2 | 4.0 | 5.0 |
|---|---|---|---|---|
| Welding Rod Length (mm) | 300 | 350 | 400 | 400 |
| Welding Current (A) | 70-90 | 80-110 | 140-160 | 160-200 |