News - How to choose stainless steel solid welding wire?

Commonly used stainless steel solid welding wires include AWS ER308, ER308L, ER309, ER309L, R316, ER316L and ER2209, etc., which are widely used in stainless steel welding, chemical industry, shipbuilding and bridge construction. The choice of stainless steel solid welding wire model must be matched according to the type of base material, welding process and working environment. The core is to ensure that the chemical composition, mechanical properties and corrosion resistance of the weld and the base material are consistent.

Select according to the type of base material (the most critical)

AWS	Main Alloy Elements	Corrosion Resistance	Mechanical Properties	Typical Applications
ER308	Cr 19.5-22%, Ni 9-11%, C≤0.08%	Good	High strength, moderate toughness	Welding of 304 stainless steel; equipment manufacturing, chemical vessels
ER308L	Cr 19.5-22%, Ni 9-11%, C≤0.03%	Better	Strong crack resistance, high toughness	Welding of 304L low-carbon steel; prevention of weld sensitization
ER309	Cr 23-25%, Ni 12-14%, C≤0.08%	Excellent	High strength	Welding 304/316 stainless steel to carbon steel; areas sensitive to hot cracking
ER309L	C≤0.03%, Cr 23-25%, Ni 12-14%	Excellent	Excellent crack resistance	Dissimilar welding of carbon steel to stainless steel; prevention of sensitization in low-carbon welds
ER316	Cr 18-20%, Ni 11-14%, Mo 2.0-3.0%	High	Strong corrosion resistance	Welding of 316 stainless steel; chemical and food processing equipment
ER316L	C≤0.03%, Mo 2.0-3.0%	Very High	Improved crack resistance	Welding of 316L low-carbon steel; seawater and acidic environments
ER2209	Cr 21.5-23.5%, Ni 7.5-9.5%, Mo 2.5-3.5%, N 0.08-0.20%	Extremely High	High strength, high toughness	Welding of duplex stainless steel; marine engineering, petrochemical industry

Adjust according to welding process

MIG/MAG Welding

Give priority to ER308LSi welding wire with higher silicon content (Si 0.65%~1.00%), which can stabilize the arc, reduce spatter, and improve weld bead formation.

TIG Welding

Uses standard component welding wire (such as ER308L), which requires high current control and is suitable for precision welding.

Submerged Arc Welding

The composition of the welding wire is the same as that of gas shielded welding, but it needs to be matched with manganese-free, medium silicon and fluorine or low silicon and high fluorine type smelting flux.