Class: ERNiFeCr-2

AWS: A5.14

Conforms to Certification: AWS A5.14        ASME SFA A5.14

Weld Process: GMAW & ASAW Welding Processes

AWS Chemical Composition Requirements
C = 0.08 max	Cu = 0.30 max
Mn = 0.35 max	Ni = 50.0 – 55.0
Fe = Remainder	Al = 0.20 – 0.80
P = 0.015 max	Ti = 0.65 – 1.15
S= 0.015 max	Cr = 17.0 – 21.0
Si = 0.35 max	Nb + Ta = 4.75 – 5.50
Mo = 2.80 – 3.30	Other = 0.50 max

 

Available Sizes
Diameter X Spool Sizes	Diameter X Coil Sizes
.035 x 33#	1/16 x COIL
.045 x 33#	3/32 x COIL
1/16 x 33#	1/8 x COIL
	5/32 x COIL

Application
ERNiFeCr-2 (NA718) filler metal is used by gas tungsten arc welding process for Cr-Ni-Nb-Mo alloys. Use of high heat impart process such as mig often results in micro-fissuring.

Deposited Chemical Composition % (Typical)
C = 0.04	Si = 0.12	Ni = 52.5
Mn = 0.25	Cr = 19.0	Nb/Ta = 5.0
Fe = Balance	Mo = 3.0	S = 0.009

Deposited Charpy-V-Notch Impact Properties %
Not applicable

Recommended Welding Parameters for MIG and SAW Welding of Nickel Alloys
Process	Diameter of Wire	Voltage (V)	Amperage (A)	Gas
MIG	.035 inches	26 – 29	150 – 190	75 % Argon +25% Helium
	.045 inches	28 – 32	180 – 220	75 % Argon +25% Helium
	1/16 inches	29 – 33	200 – 250	75 % Argon +25% Helium
SAW	3/32 inches	28 – 30	270 – 350	Suitable Flux May Be Used.
	1/8 inches	29 – 32	350 – 450	Suitable Flux May Be Used.
	5/32 inches	30 – 33	400 – 550	Suitable Flux May Be Used.

Note: Other shielding Gases may be used for Mig welding. Shielding gases are chosen taking Quality, cost, and Operability into consideration.
Note:  Both agglomerated and fused fluxes can be used for submerged arc welding.
Note: The chemical composition of the flux mainly affects the chemistry of the weld metal and consequently its corrosion resistance and mechanical properties.