ER308

AWS: A5.9

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

Weld Process Used for Mig (GMAW) and Submerged Arc (SAW)

AWS Chemical Composition
C = 0.08 max
Cr = 19.5 – 22.0
Ni = 9.0 – 11.0
Mo = 0.75 max
Mn = 1.0 – 2.5
Si = 0.30 – 0.65
P = 0.03 max
S = 0.03 max
Cu = 0.75 max


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Product Details
Available Sizes
Diameter X Spool SizesDiameter X Coil Sizes
.025 x 2#, 10#, 25#1/16 x 60# & mill coil
.030 x 2#, 10#, 25#, 30#, 33#5/64 x 60# & mill coil
.035 x 2#, 10#, 25#, 30#, 33#3/32 x 60# & mill coil
.045 x 2#, 10#, 25#, 30#, 33#1/8 x 60# & mill coil
1/16 x 10#, 25#, 30#, 33#3/16 x 60# & mill coil

5/32 x 60# & mill coil

Application

WW308 is used to MIG, and submerged arc 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 = 0.04Si = 0.30Mn = 1.8
P = 0.009S = 0.009Cr = 20.0
Ni = 9.5N = 0.05

 

Mechanical Properties (R.T.) 
Yield Strength61,000 psi
Tensile Strength90,000 psi
Elongation41%
Reduction of Area60%

Deposited All Weld Metal Properties
Data is typical for ER308 weld metal deposited by Mig using Argon + 2% oxygen as the shielding gas. Data on sub-arc is not presented, as sub-arc is dependent on the type of flux used.

Recommended Welding Parameters
GMAW “Mig Process”Reversed Polarity

Wire DiameterWire FeedAmpsVoltsShielding GasGas CFH
Short Arc Welding.03013-2640-12016-20Argon+2% O225

.03513-2660-14016-22Argon+2% O225
Spray Arc Welding.03520-39140-22024-29Argon+2% O238

.04516-30160-26025-30Argon+2% O238

1/1610-16230-35027-31Argon+2% O238

Other shielding Gases may be used for Mig welding. Shielding gases are chosen taking Quality, Cost, and Operability into consideration

Recommended Welding Parameters
SAW “Submerged Arc Welding Process”
REversed Polarity Suggested
Wire DiameterAmpsVolts
3/32250-45028-32
1/8300-50029-34
5/32400-60030-35
3/16500-70030-35

Both Agglomerated and fused fluxes can be used for submerged arc welding.
Note: The chemical composition of the flux mainly affects the chemistry of the weld metal and consequently its corrosion resistance and Mechanical properties.


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