718 (ERNiFeCr-2)
AWS A5.14 ERNiFeCr-2
ASME SFA 5.14 ERNiFeCr-2
Alloy 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 Alloy 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 Alloy 718 will precipitation hard en on heat treatment. Primarily for welding aircraft high strength components and liquid rocket components exposed to cryogenic temperatures.
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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