Class: ER308

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
P = 0.03 max
Cr = 19.5 – 22.0
S = 0.03 max
Ni = 9.0 – 11.0
Mo = 0.75 max
Mn = 1.0 – 2.5
Cu = 0.75 max
Si = 0.30 – 0.65

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
WW308 is used to TIG welding of un-stabilized stainless steels such as Types 301, 302, 304, 305, 308. This filler metal is the most popular grade among stainless steels, used for general purpose applications where corrosion conditions are moderate.

Deposited Chemical Composition % (Typical)
C = 0.04	Si = 0.30	Mn = 1.8
P = 0.009	S = 0.009	Cr = 20.0
Ni = 9.5	N = 0.05

 

Mechanical Properties (R.T.)
Yield Strength	61,000 psi
Tensile Strength	90,000 psi
Elongation	41%
Reduction of Area	60%

Deposited All Weld Metal Properties
Data is typical for ER308 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.