ER308

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.