Compare ER347 and ER308L by niobium stabilization, low-carbon design, matching base metals, thermal exposure, and welding applications.
ER347 and ER308L are both austenitic stainless fillers, but they address sensitization differently.
ER347 Strategy
ER347 contains niobium stabilization. It is used where stabilized weld-metal chemistry is required.
ER308L Strategy
ER308L controls sensitization primarily through low carbon. It is widely used for 304 and 304L general fabrication.
When Is ER347 Preferred?
- Welding 347 stainless
- Selected welding of 321 stainless
- Heat-exposed stabilized stainless systems
- Procedures specifically requiring ER347
When Is ER308L Preferred?
- General 304 and 304L fabrication
- Tanks and architectural stainless
- Food equipment
- Standard low-carbon applications
Can They Be Substituted?
Not without approval. Stabilization, ferrite, service temperature, and procedure qualification must be reviewed.
Dayang Welding supplies both stabilized and low-carbon stainless filler options.
