718
AWS A5.14 Class ERNiFeCr-2
718 is a nickel-chromium-columbium-molybdenum filler metal designed
specifically for TIG welding of Inconel® alloys 718, 706 and X-750. The weld deposit of 718 offers exceptional high strength and good ductility at temperatures up to 1300°F. Good weldability and formability as well as
excellent cryogenic properties account for the many applications of this filler metal. The weld deposits of 718 will precipitation-harden on heat treatment.
TYPICAL WELD METAL CHEMISTRY (%)
Ni | 50.0-55.0 |
C | 0.08 max. |
Mn | 0.35 max. |
Fe | Balance |
S | 0.015 max. |
Si | 0.35 max. |
Cu | 0.30 max. |
Cr | 17.0-21.0 |
Al | 0.20-0.80 |
Ti | 0.65-1.15 |
*Cb | 4.75-5.50 |
Mo | 2.80-3.30 |
P | 0.015 max. |
B | 0.006 max. |
Co | Incidental |
*Includes Tantalum (Ta)
MINIMUM MECHANICAL PROPERTIES (as welded)
Tensile strength (psi) | 165,000 |
Yield strength (0.2% offset) (psi) | 135,000 |
Age hardened at 1325°F/8 hours,
furnace cool to 1150°F at 100°F/hour, then air cool.
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