Class: ER409

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 = 10.5 – 13.5
Ni = 0.60 max
Mo = 0.50 max
Mn = 0.80 max
Si = 0.80 max
P = 0.03 max
S = 0.03 max
Cu = 0.75 max
Ti = 10 x C (min) – 1.5 (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
The nominal composition of ER409 weld metal is 12% chromium with Ti added as a stabilizer. This material often is used to weld bare metal of similar composition.

Deposited Chemical Composition % (Typical)
C = 0.05	Mo = 0.30	P = 0.016
Cr = 11.5	Mn = 0.62	S = 0.018
Ni = 0.35	Si = 0.48	Cu = 0.16
TI = 0.50

 

Mechanical Properties (R.T.)
Yield Strength	50,500psi
Tensile Strength	67,000psi
Elongation	26%

Deposited All Weld Metal Properties
Data is typical for ER409 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.