ER309LSi – Washington Alloy

ER309LSi is distinguished by its elevated silicon content in comparison to ER309L, combined with a carbon level that is lower than that of ER309. This higher silicon ratio contributes to improved arc stability and an aesthetically pleasing bead profile, while the average carbon content of approximately 0.02% aids in minimizing carbide precipitation. Generally, the applications for ER309LSi align closely with those seen in ER309 and ER309L.

Read more

Class: ER309L

AWS: A5.9

Certification Standards: AWS A5.9 ASME SFA A5.9

Welding Processes Applicable: MIG (GMAW) and Submerged Arc (SAW)

AWS Chemical Composition Specifications:

• 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

Applications: ER309L shares similar properties with ER309 but is characterized by its reduced carbon levels, making it essential for various chemical applications. It is often preferred for cladding over carbon or low alloy steels, as well as dissimilar joints subjected to heat treatment.

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 at Room Temperature:

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

Deposited All Weld Metal Properties: This data is representative of ER309L weld metal deposited through MIG using Argon + 2% oxygen as the shielding gas. Data for submerged arc does not appear as it is contingent on the type of flux utilized.

Recommended Welding Parameters:

GMAW – MIG Process:

• Reversed Polarity
• Wire Diameter
• Wire Feed
• Contact Jinertai for further inquiries.

• Amps
• Volts
• Shielding Gas
• Gas CFH

Short Arc Welding Parameters:

• .030: 13-26 Amps, 40-120 Volts, Argon+2% O2, 25 CFH
• .035: 13-26 Amps, 60-140 Volts, Argon+2% O2, 25 CFH

Spray Arc Welding Parameters:

• .035: 20-39 Amps, 140-220 Volts, Argon+2% O2, 38 CFH
• .045: 16-30 Amps, 160-260 Volts, Argon+2% O2, 38 CFH
• 1/16: 10-16 Amps, 230-350 Volts, Argon+2% O2, 38 CFH

Alternative shielding gases may also be used for MIG welding, which are selected based on quality, cost, and operational feasibility.

Recommended Submerged Arc Welding Parameters:

Use of both agglomerated and fused fluxes for submerged arc welding is accepted. Note that the chemical makeup of the flux significantly influences the weld metal's chemistry, and therefore its corrosion resistance and mechanical characteristics.

If you're interested in gaining more insight on ER309L MIG wire, don’t hesitate to contact us for an expert consultation!