author
Bobby Brown
Post 2016-02-09
AISI303 material datasheet

Contents


What is AISI 303

AISI 303 (SUS 303) Grade Stainless Steel. Stainless steel type 1.4305 is popularly known as grade 303 stainless steel. Grade 303 is the most readily machinable of all the austenitic grades of stainless steel. The machinable nature of grade 303 is due to the presence of Sulphur in the steel composition. Whilst the Sulphur improves machining, it also causes a decrease in the corrosion resistance and a slight lowering of the toughness.


Chemical and physical properties

Sulphur additions to the composition act as initiation sites for pitting corrosion. This decreases the corrosion resistance of 303 stainless steel to less than that for 304. However corrosion resistance remains good in mild environments.

In chloride containing environments over 60°C, 303 stainless steel is subject to pitting and crevice corrosion. Grade 303 stainless is not suitable for use in marine environments.

Grade 303 stainless steel has good resistance to oxidation when intermittently exposed to temperature up to 760°C temperatures. It also has good oxidation resistance in continuous service to 870°C. This, however, is not recommended as 303 is sensitive to carbide precipitation with continuous use at 425-860°C.

Chemical Resistance Chart

How to use this chart

» Meaning of symbol: 
OK: Recommended. △: Must confirm if usable by testing in advanced. X: Not recommended.
» This chart only provides the result of a single chemical to material, if a client uses more than one kind of chemical at the same time, please choose material by experience.
» This chart is for reference only which is not applicable to all working environments. Please refer to design equipment according to practical experience.
 
Category Name AISI316
Organic acids
Acetic acid OK
Acetic acid, glacial N/A
Acetic anhydride OK
Citric acid N/A
Organic compound
Acetaldehyde OK
Acetone OK
Methyl alcohol OK
Aniline OK
Benzaldehyde OK
Benzene N/A
Benzyl alcohol N/A
Benzyl chloride N/A
Corn oil N/A
Ethanol OK
Ethylene glycol OK
Fatty acid N/A
Formaldehyde
Formic acid OK
Hexane N/A
Lactic acid OK
Methanol OK
Paraffin oil N/A
Petroleum N/A
Phenol OK
Propane, liq OK
Propanol OK
Stearic acid N/A
Tannic acid N/A
Tartaric acid N/A
Toluene OK
Urea N/A
Inorganic compound
Ammonia OK
Ammonium chloride N/A
Ammonium hydroxide OK
Ammonium nitrate N/A
Ammonium sulfate N/A
Aqua regia N/A
Barium chloride OK
Barium hydroxide OK
Brine N/A
Calcium Chloride N/A
Calcium hydroxide N/A
Carbonic acid N/A
Chloric acid N/A
Chlorine OK (wet)
Detergent OK
Hydrobromic acid N/A
Hydrochloric acid N/A
Hydrofluoric acid △ (50%)
Hydrogen peroxide OK (30%)
Nitric acid OK (10%)
OK (concentrated)
Phosphoric acid OK (10%)
OK (concentrated)
Potassium hydroxide OK (50%)
Potassium nitrate
Potassium sulfate OK
Sodium carbonate OK
Sodium hydroxide OK
Sodium nitrate N/A
Sulfuric acid OK (concentrated)
Sulfur dioxide OK (liquid)

Reference

  1. ^ AISI303 - wikipedia
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