ER309LSi – Washington Alloy

ER309LSi has a higher level of silicon than ER309L combined with a carbon content lower than ER309. The increased silicon level provides better arc stability and a smoother bead appearance while an average 02% carbon level reduces carbide precipitation. Typical applications
would include those of ER309 and ER309L.

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Class: ER309L

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 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 = 0.30 &#; 0.65
P = 0.03 max
S = 0.03 max
Cu = 0.75 max

Available Sizes

Diameter X Spool Sizes

Diameter 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
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 = 0.015 Mo = 0.25 P = 0.012 Cr = 23.50 Mn = 2.0 S = 0.010 Ni = 13.50 Si = 0.40

 

Mechanical Properties (R.T.) 

Yield Strength 58,000 psi Tensile Strength 87,000 psi Elongation 40% Reduction of Area 60%

Deposited All Weld Metal Properties
Data is typical for ER309L 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 Diameter

Wire Feed

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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.

 

 

 

 

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