Series 200 stainless steels have excellent impact resistance and toughness, however, even in low and cryogenic temperatures. They're generally harder and stronger than 300 series steels, primarily due to their higher nitrogen content which acts as a strengthener. Austenitic steels are more expensive than their ferritic counterparts, but the 200 series is cheaper to produce than 300 series steels because of its lower nickel content.
Grade 201 stainless steel has good formability, corrosion resistance, and fabricability. It is similar to that of 301 stainless steel.