High-alloy austenitic stainless steel
904L Stainless Steel
904L is a high-nickel, molybdenum-bearing austenitic stainless steel with copper additions, used for selected aggressive process environments. Suitability depends on media, concentration, temperature, contaminants, fabrication and the governing design standard.
Final material selection remains the responsibility of the project design authority. Confirm product form, governing standard and current availability with sales.
Specification overview
| Material standard | Confirm with sales |
|---|---|
| Product form and dimensions | Confirm with sales |
| Service environment | Required in the RFQ |
| Testing and documents | Confirm with sales |
Selection note
Provide a complete corrosion and design basis; compare 904L with duplex or other alloys only through application-specific engineering review.
Characteristics
- High nickel and molybdenum content with copper addition
- Austenitic structure
- Used for selected aggressive chemical environments
- Material and fabrication route require careful commercial and technical confirmation
Available forms
Common finishes
Typical applications
- Chemical processing equipment
- Acid-service components where engineering specifies 904L
- Heat exchangers
- Pollution-control and process equipment subject to design review