Data Sheets

Stainless Steel   |   Austenitic

201~201L~202~204

Commercial200 Series

200 Series stainless steels are not new – In fact they have been around for many years. To date they have traditionally not proved very popular outside the USA. However, since they have a much lower Nickel content than 300 Series Austentics, the very high Nickel price over recent years has led to significantly more interest. Equally, stainless steel producers have an ongoing programme of development designed to enhance existing grades and produce new grades. These new grades are sometimes developed for specific end uses and sometimes to improve upon an existing grade.

Features:
~ Lower nickel than 300 series – with it being replaced by Manganese
~ Thus lower cost than 300 series
~ Similar mechanical & physical properties to 300 series
~ Similar fabrication performance to 300 series, including deep-drawing
~ Corrosion resistance similar to 430 (i.e. not nearly as good as 300 series)
~ High carbon may cause stress corrosion cracking, especially after welding thicker material
~ Non Magnetic

Performance Comparison:
~ Formability: Similar to 304, better than 430
~ Strength: Stronger than 304 (and 430)
~ Corrosion Resistance @20 C: Similar to 304, better than 430 but susceptible to stress corrosion cracking / intergranular corrosion especially after welding


Chemical Composition

Chemical Element % Present
Iron (Fe) balance
Nitrogen (N) 0.25 max
Nickel (Ni) 2 - 5
Manganese (Mn) 6.8 - 8.5
Chromium (Cr) 16 - 18

See attached page for full chemical analysis and mechanical properties


Alloy Designations

AISI 201 stainless steel corresponds to the following specifications:

UNS20100 / EN1.4372 / JIS SUS 201

 

AISI 201L stainless steel corresponds to the following specifications:

UNS20103 / EN1.4371

 

AISI 202 stainless steel corresponds to the following specifications:

UNS20200 / EN1.4373

 

AISI 204C stainless steel corresponds to the following specifications:

UNS20400 / EN1.4597


Supplied Forms

  • Sheet
  • Plate

Generic Physical Properties

Physical Property Value
Density 7.80 g/cm³
Thermal Expansion 17 x10^-6 /K
Modulus of Elasticity 200 GPa
Thermal Conductivity 15 W/m.K

Mechanical Properties


-
Mechanical Property Value
Proof Stress 310 Min MPa
Tensile Strength 655 Min MPa
Elongation A50 mm 40 min %

See attached page for full mechanical properties. Note that there are some differences in the requirements of AISI 200 series types and the EN standards - The above is taken from AISI. EN 1.4372, the EN equivalent to AISI 201 has a minimum proof of 350 and a tensile range of 750 to 950 whilst minimum elongation is 45%


Applications

200 series austenitics are typically used to replace types 304 and 301 as well as Carbon (Chrome-Manganese) Steels mainly for indoor use for low corrosion applications at room temperature

 

Furniture

Bins

Cookware & Serving Bowls

Window Channel Spacers

Safety Shoes (mid-sole protector)

Deep drawn kitchen equipment – e.g. Cookware & Sinks

Hose Clamps

Trailer Frames

Industrial Strapping

Railway Rolling Stock

There is also grade 201LN for welded constructions, structural uses and low temperature applications  - Examples include sides & roofs of trains, liquified gas storage vessels, structural members/chassis of railway rolling stock, trucks & trailers, coal handling equipment

Performance Comparison

The 200 series grades perform at a similar level to grades 304 and 301 in low corrosion, mainly indoor applcations at room temperature.

Corrosion Resistance

The 200 series grades perform at a similar level to grades 304 and 301 in low corrosion, mainly indoor applcations at room temperature.

Not recommended for use in Chloride environments.

Heat Resistance

Oxidation resistance is similar to grade 1.4310 (301) up to 840 Centigrade.

Weldability

Reasonable, although sensitive to intergranular corrosion in the heat affected zone where thickness exceeds 6mm.

Post-weld cleaning and passivation is crucial.