Data Sheets
Stainless Steel | Austenitic
201~201L~202~204
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.
Disclaimer
This Data is indicative only and as such is not to be relied upon in place of the full specification. In particular, mechanical property requirements vary widely with temper, product and product dimensions. All information is based on our present knowledge and is given in good faith. No liability will be accepted by the Company in respect of any action taken by any third party in reliance thereon.
Please note that the 'Datasheet Update' date shown above is no guarantee of accuracy or whether the datasheet is up to date.
The information provided in this datasheet has been drawn from various recognised sources, including EN Standards, recognised industry references (printed & online) and manufacturers’ data. No guarantee is given that the information is from the latest issue of those sources or about the accuracy of those sources.
Material supplied by the Company may vary significantly from this data, but will conform to all relevant and applicable standards.
As the products detailed may be used for a wide variety of purposes and as the Company has no control over their use; the Company specifically excludes all conditions or warranties expressed or implied by statute or otherwise as to dimensions, properties and/or fitness for any particular purpose, whether expressed or implied.
Advice given by the Company to any third party is given for that party’s assistance only and without liability on the part of the Company. All transactions are subject to the Company’s current Conditions of Sale. The extent of the Company’s liabilities to any customer is clearly set out in those Conditions; a copy of which is available on request.