Introduction
Buyers comparing 2205 duplex and 316L austenitic stainless usually face a corrosion-plus-fabrication tradeoff. 316L is the common molybdenum-bearing austenitic grade for chloride and chemical service. 2205 adds higher strength and, in many duties, better resistance to chloride stress corrosion cracking—but only when welding and design are duplex-aware.
When buyers choose 316L
316L is practical for process equipment, sanitary lines, and general chloride exposure when the design already assumes austenitic fabrication practices. It is widely available in plate, coil, and pipe forms with ASTM A240 / A312 class practice.
When buyers choose 2205
Specify 2205 when the project needs higher allowable stress, better chloride SCC margin, or a duplex specification on the drawing. Confirm PREN-related chemistry on the MTC and align welding heat-input limits with the fabricator before locking the PO.
RFQ checklist
- Grade and standard (2205 / UNS class practice vs 316L / ASTM A240 or A312)
- Product form and size
- Welding and NDT expectations
- EN 10204 3.1 heat-lot documents
- Packing and destination port
