Class: ER309LSI

AWS: A5.9

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

Weld Process Used for Tig (GTAW)

AWS Chemical Composition Requirements
C = 0.03 max
Cr = 23.0 – 25.0
Ni = 12.0 – 14.0
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

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
ER309L has the same qualities as ER309 but with the lower carbon content deemed necessary in many chemical applications. ER309L is preferred over ER309 for cladding over carbon or low alloy steels, or dissimilar joints that are heat treated.

Deposited Chemical Composition % (Typical)
C = 0.019	Mo = 0.15	P = 0.008
Cr = 23.50	Mn = 1.85	S = 0.006
Ni = 12.95	Si = 0.84

 

Mechanical Properties (R.T.)
Yield Strength	60,500 psi
Tensile Strength	89,000 psi
Elongation	35%
Reduction of Area	60%

Deposited All Weld Metal Properties
Data is typical for ER309L 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.