Class: ER347Si

AWS: A5.9

Conforms to Certification: AWS A5.9              ASME SFA A5.9

Weld Process Used for Tig (GTAW)

AWS Chemical Composition Requirements
C = 0.08 max
Cr = 19.0 – 21.5
Ni = 9.0 – 11.0
Mo = 0.75 max
Mn = 1.0 – 2.5
Si = 0.65 – 1.00
P = 0.03 max
S = 0.03 max
Cu = 0.75 max
Nb = 10 x C (min) – 1.0 (max)

Available Sizes
.030 x 36
.035 x 36
.045 x 36
1/16 x 36
3/32 x 36
1/8 x 36
3/16 x 36
5/32 x 36

Application
ER347SI is a columbium stabilized stainless steel welding wire used to weld Types 321 and 347. Addition of columbium reduces the possibility of chromium carbide precipitation and consequent inter-granular corrosion. ER347SI is recommended if the weld metal is to be subjected to high temperatures above 750ºF.

Deposited Chemical Composition % (Typical)
C = 0.04	Mo = 0.30	P = 0.025
Cr = 20.00	Mn = 1.50	S = 0.015
Ni = 9.50	Si = 0.80	Cu = 0.10
Nb = 0.40

 

Mechanical Properties (R.T.)
Yield Strength	88,000psi
Tensile Strength	58,000psi
Elongation	42%

Deposited All Weld Metal Properties
Data is typical for ER347SI weld metal deposited by Tig using 100% Argon as the shielding gas.

Recommended Welding Parameters
GTAW “Tig Process”
Wire Diameter	Amps DCSP	Volts	Shielding Gas
.035	60-90	12-15	Argon 100%
.045	80-110	13-16	Argon 100%
1/16	90-130	14-16	Argon 100%
3/32	120-175	15-20	Argon 100%

Note: Parameters for tig welding are dependent upon plate thickness and welding position.
Other shielding Gases may be used for Tig welding. Shielding gases are chosen taking Quality, Cost, and Operability into consideration.