When should I use ER308L, ER309L, ER316L or ER347 ...

ER308L (including ER308LSi) is predominately used on austenitic stainless steels, such as types 301, 302, 304, 305 and cast alloys CF-8 and CF-3. For high temperature applications such as in the electrical power industry, the high carbon 308H electrode provides better creep resistance than does 308L.

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ER316L (including ER316LSi) filler metal should be used with ER316L and ER316 base metals. CF-8M and CF-3M are the cast equivalents of 316 and 316L, respectively.

Use ER309L (including ER309LSi) when joining mild steel or low alloy steel to stainless steels, for joining dissimilar stainless steels such as 409 to itself or to ER304L stainless, as well as for joining 309 base metal. CG-12 is the cast equivalent of 309. Some ER308L applications may be substituted with ER309L filler metal, but ER316L or ER316 applications generally require molybdenum and 309L contains no molybdenum.

Type ER347 stainless steel filler metal is ideal for ER347 and ER321 base materials because it matches these stabilized grades. CF-8C is the cast equivalent of ER347. Type ER347 filler metal is also suitable most ER308L filler metal applications.

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Class: ER309LSI

AWS: A5.9

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

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

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 &#; Diameter X Spool Sizes
.025 x 2#, 10#, 25#
.030 x 2#, 10#, 25#, 30#, 33#
.035 x 2#, 10#, 25#, 30#, 33#
.045 x 2#, 10#, 25#, 30#, 33#
1/16 x 10#, 25#, 30#, 33#

Application
ER309LSI is suitable for joining stainless steels of the 304 type and 347 types. The higher silicon gives arc stability and exceptionally smooth bead appearance.

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 ER309LSI 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&#;

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Further reading:
How to Choose a Poly Strip Disc Wheel?

Reversed Polarity

Wire Diameter

Wire Feed

Amps

Volts

Shielding Gas

Gas CFH

Short Arc Welding

.030 13-26 40-120 16-20 Argon+2% O2 25 .035 13-26 60-140 16-22 Argon+2% O2 25

Spray Arc Welding

.035 20-39 140-220 24-29 Argon+2% O2 38 .045 16-30 160-260 25-30 Argon+2% O2 38 1/16 10-16 230-350 27-31 Argon+2% O2 38

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 Diameter

Amps

Volts

3/32 250-450 28-32 1/8 300-500 29-34 5/32 400-600 30-35 3/16 500-700 30-35

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.

If you are looking for more details, kindly visit er309l mig wire.