INCONEL® Filler Metal 740H
INCONEL® Filler Metal 740H
INCONEL Filler Metal 740H is used for the Gas-Metal-Arc and Gas-Tungston-Arc welding of INCONEL alloy 740 and 740H. Filler Metal 740 (a Ni-Cr-Co alloy) is age-hardenable by the precipitation of a gamma prime second phase. The alloy is intended for service in high temperature applications for the ultra-supercritical power boilers and diesel engine exhaust valve markets.
The alloy has excellent resistance to coal ash corrosion.
Specifications:
- AWS A5.14 ERNiCrCo-3 (Proposed)
- ASME II,SFA-5.14, ERNiCrCo-3 (Proposed)
- UNS N07740
| Nominal Chemical Composition (%) | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ni | Cr | Co | C | Mn | Fe | P | Others | Fe | Si | Ti | Cu | Al | Nb | Mo |
| Remainder | 23.5 to 25.5 | 15.0 to 22.0 | 0.005 to 0.0080 | 1.0 max | 3.0 max | 0.03 max | 0.50 | 0.5 | 1.0 max | 0.2 to 2.0 | 0.50 max | 0.5 to 2.5 | 0.50 to 2.5 | 2.0 max |
| Minimum Mechanical Properties | |
|---|---|
| Tensile Strength (psi) | 80,000 |
| Tensile Strength (MPA) | 552 |
| Elongation (4d) % | 30 |