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JL-M309
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ISO 14343-B-SS309
AWS A5.9 ER309

Application

Used for welding the same type of stainless steel, stainless steel linings, dissimilar steels (such as 06Cr19Ni13Si and low-carbon steel), and high-Cr and high-Mn steels.

Characteristics

The Welding Wire is a 24%Cr-13%Ni Stainless Steel Welding Wire. Due to the high content of the alloy, it has good high-temperature resistance. The welding arc is stable and the weld formation is well-formed.It can be welded in all positions.

Chemical composition of welding wire: (Mass fraction)%

ItemCMnSiCrNiMoPSCu
Standard≤0.121.00-2.500.30-0.6523.00-25.0012.00-14.00≤0.75≤0.030≤0.030≤0.75

Mechanical Properties of Deposited Metal

ItemTensile StrengthRm/MPaElongation A/%
Standard≥550≥30
Test Result60542

Note

For MIG welding, the shielding gas flow rate should be maintained at 18-25 L/min using Ar+2%O2 mixture. Wind shields must be employed when wind speed exceeds 0.5 m/s.

For TIG welding:

Gas flow rate should be 5-14 L/min at welding currents between 15-200 A Gas flow rate should be 14-24 L/min at welding currents between 200-320 A

Pure argon must be used as shielding gas. Wind shields are required when wind speed exceeds 1.0 m/s.

Pre-welding requirement: Both MIG and TIG welding processes require thorough removal of rust, oil, moisture and other contaminants from workpieces.

Note: The above parameters serve as reference only. Users shall establish suitable welding procedures based on specific production conditions.

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