Common Name: Oxford Alloy® 718 FM 718 Techalloy 718
Standard: AWS A5.14, ERNiFeCr-2 ASME II, SFA-5.14, ERNiFeCr-2 UNS N07718 ISO SNi7718 DIN 1736 SG-NiCr19NbMoTi Europe NiFe19Cr19Nb5Mo3
INTRODUCTION
OHMALLOY ERNiFeCr-2 is used for gas-tungsten-arc welding of Inconel alloy 718, 706 and X-750. The weld metal is age hardenable and has mechanical properties comparable to those of the base metals.
CHEMICAL COMPOSITION(%)
C | Si | Mn | S | P | Ni | Cr |
≤0.08 | ≤0.35 | ≤0.35 | ≤0.015 | ≤0.015 | 50-55 | 17-21 |
Al | Ti | Fe | Cu | Mo | Nb+Ta | Co |
0.2-0.8 | 0.65-1.15 | Rest | ≤0.3 | 2.8-3.3 | 4.75-5.5 | ≤1.0 |
WELDING PARAMETERS
Process | Diameter | Voltage | Amperage | Gas |
TIG | .035” (0.9mm) .045” (1.2mm) 1/16” (1.6mm) 3/32” (2.4mm) 1/8”(3.2mm) | 12-15 13-16 14-18 15-20 15-20 | 60-90 80-110 90-130 120-175 150-220 | 100% Argon 100% Argon 100% Argon 100% Argon 100% Argon |
MIG | .035” (0.9mm) .045” (1.2mm) 1/16” (1.6mm) | 26-29 28-32 29-33 | 150-190 180-220 200-250 | 75% Argon + 25% Helium 75% Argon + 25% Helium 75% Argon + 25% Helium |
SAW | 3/32” (2.4mm) 1/8”(3.2mm) 5/32”(4.0mm) | 28-30 29-32 30-33 | 275-350 350-450 400-550 | Suitable Flux may be used Suitable Flux may be used Suitable Flux may be used |
MECHANICAL PROPERTIES
Tensile Strength | 125,000 PSI | 860 MPA |
Yield Strength | 91,000 PSI | 630 MPA |
Elongation | 27% |
APPLICATIONS
Ø OHMALLOY ERNiFeCr-2 mainly used for welding high strength aircraft components and liquid rocket components involving cryogenenic temperatures.
Ø OHMALLOY ERNiFeCr-2 also can be used for high heat input processes such as MIG welding often result in micro fissuring.
Common Name: Oxford Alloy® 718 FM 718 Techalloy 718
Standard: AWS A5.14, ERNiFeCr-2 ASME II, SFA-5.14, ERNiFeCr-2 UNS N07718 ISO SNi7718 DIN 1736 SG-NiCr19NbMoTi Europe NiFe19Cr19Nb5Mo3
INTRODUCTION
OHMALLOY ERNiFeCr-2 is used for gas-tungsten-arc welding of Inconel alloy 718, 706 and X-750. The weld metal is age hardenable and has mechanical properties comparable to those of the base metals.
CHEMICAL COMPOSITION(%)
C | Si | Mn | S | P | Ni | Cr |
≤0.08 | ≤0.35 | ≤0.35 | ≤0.015 | ≤0.015 | 50-55 | 17-21 |
Al | Ti | Fe | Cu | Mo | Nb+Ta | Co |
0.2-0.8 | 0.65-1.15 | Rest | ≤0.3 | 2.8-3.3 | 4.75-5.5 | ≤1.0 |
WELDING PARAMETERS
Process | Diameter | Voltage | Amperage | Gas |
TIG | .035” (0.9mm) .045” (1.2mm) 1/16” (1.6mm) 3/32” (2.4mm) 1/8”(3.2mm) | 12-15 13-16 14-18 15-20 15-20 | 60-90 80-110 90-130 120-175 150-220 | 100% Argon 100% Argon 100% Argon 100% Argon 100% Argon |
MIG | .035” (0.9mm) .045” (1.2mm) 1/16” (1.6mm) | 26-29 28-32 29-33 | 150-190 180-220 200-250 | 75% Argon + 25% Helium 75% Argon + 25% Helium 75% Argon + 25% Helium |
SAW | 3/32” (2.4mm) 1/8”(3.2mm) 5/32”(4.0mm) | 28-30 29-32 30-33 | 275-350 350-450 400-550 | Suitable Flux may be used Suitable Flux may be used Suitable Flux may be used |
MECHANICAL PROPERTIES
Tensile Strength | 125,000 PSI | 860 MPA |
Yield Strength | 91,000 PSI | 630 MPA |
Elongation | 27% |
APPLICATIONS
Ø OHMALLOY ERNiFeCr-2 mainly used for welding high strength aircraft components and liquid rocket components involving cryogenenic temperatures.
Ø OHMALLOY ERNiFeCr-2 also can be used for high heat input processes such as MIG welding often result in micro fissuring.
