Sandvik 2RK65 ('904L') is a high-alloy austenitic stainless steel intended for use under severe corrosion conditions within the process industry. The material is characterized by:

• Very good resistance to attack in acidic environments, e.g. sulphuric, phosphoric and acetic acid

• Very good resistance to pitting in neutral chloride-bearing solutions

• Much better resistance to crevice corrosion than steels of the ASTM 304 and ASTM 316 types

• Very good resistance to stress corrosion cracking

• Good weldability

Applications
Sandvik 2RK65 is a multi-purpose material for use under severe corrosion conditions. This has been proven both by laboratory tests and by extensive operational experience with the steel.

Typical applications for Sandvik 2RK65 are found in oil refineries and within the chemical and petrochemical industry.

Sandvik 2RK65 is also used within the pulp and paper, mineral and metallurgical and food industries, in seawater cooling and in many other fields.

The grade is an excellent alternative to standard austenitic stainless steels in heat exchangers using high temperature water with chloride contamination.