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Discover Our Great 200 Series Grade-201 stainless steel

Y1 austenitic stainless steel

Y1 austenitic stainless steel

$ 1.00


Type 201 Stainless Steel is an austenitic stainless steel.  Because it was developed to conserve nickel. Thus, type 201 is a lower cost alternative to conventional Cr-Ni stainless steels such as 301 and 304.  Nickel is replaced by additions of manganese and nitrogen. It is non-hardenable by thermal treatment but may be cold worked to high tensile strengths.  More and more, Type 201 is essentially nonmagnetic in the annealed condition.  However, it becomes magnetic when cold worked. Moreover, type 201 can be substituted for Type stainless steel 301 in many applications.


Sheet, Strip, coils, and foils.



ASTM A240, A666



Typical applications for Types 201 contains cookware, hose clamps, piston rings, transit car structural member, transit car roofing/siding, thermal window spacers, airbag containers, and truck trailer posts and door frames.



Type 2010.15x5.5 – 7.50.03X0.060x1.0 x16 – 183.5 -5.50.25x



TypeYield Strength 0.2% offset (KSI)Tensile Strength (KSI)% Elongation (2″ Gauge length)
201 Ann38 min.75 min.40% min.
201 ¼ Hard75 min.125 min.25.0 min.
201 ½ Hard110 min.150 min.18.0 min.
201 ¾ Hard135 min.175 min.12.0 min.
201 Full Hard145 min.185 min.9.0 min.



The annealing temperature for Type 201 is between 1850-2000°F.  After that, Rapid cooling through the carbide precipitation range (800 – 1500 °F) is necessary to keep the carbides in solution and prevent sensitization. So the type 201 is not hardenable by thermal treatment; it is only hardenable by cold working.



Type 201 has similar bending, forming and drawing characteristics with the Type 301 stainless steel.



By all conventional methods, type 201 can be welded applied to 18 percent chromium, and 8 percent nickel steels.  Moreover, filler metal of the conventional chromium-nickel analyses can be used. Like other austenitic stainless steels where carbon is not controlled below 0.03%.  Therefore, type 201 is susceptible to intergranular corrosion in the weld heat affected zone.



Type 201 is resistant to a wide variety of mild to moderately corrosive environments. Also, its corrosion resistance has approaching Types 301.  So it has been successfully substituted for 304 in many mild environments.


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