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What is Stainless Steel

What is Stainless Steel?

Stainless Steel is metal that contains a minimum of 12-1/2-13% chromium, this makes it resistant but not stain-proof, to corrosion. Chromium oxide content "CrO" creates a barrier to oxygen and moisture, helping to prevent rust formation.

Points to remember.

Regarding your Stainless Steel DOSmith Product:   
To keep your stainless steel product in an as new condition regular cleaning is recommended.
When ordering your DOSmith Stainless Steel product consider the location of the product. If necessary seek a recommendation from the experienced DOSmith staff.
Stainless steel types vary and certain types are suited to different uses. The most common types are 304# and 316#.
The DOSmith warranty does not cover discolourisation.
  230 Square Bins
Two main types of Finishes
Polished Finish BA: Polished stainless steel has a mirror like finish.
Satin finish #4: Satin finish stainless steel has fine lines scratched into the surface.
Grade 304# – Stainless Steel  
Grade 304# is the standard "18/8" stainless and is the most commonly used stainless steel for DOSmith Products.  304# stainless steel has excellent bending and welding characteristics.
304# Corrosion Resistance
304# stainless is excellent for use indoors and in low corrosive environments ie away from salt water. For beachside installations 316# is recommended. Alternatively 304# can be used if suitably cleaned and maintained on a regular basis or if a powdercoat has been applied.
Typical applications or 304# include
Food processing equipment including-    Kitchen benches, sinks, troughs, equipment and appliances
Architectural panelling & trim   
Litterbins, planter tubs, street furniture. 
Woven or welded screens and perforated metal for building purposes
  LT480 Stainless Litter Bin

Grade 316# – Stainless Steel  

316# stainless steel contains molybdenum. Molybdenum gives 316 better overall corrosion resistant properties than Grade 304#. Particuarly higher corrosion resistance to pitting and crevice corrosion in chloride environments such as marine areas. 316#  also has excellent forming and welding characteristics.   
316# Corrosion Resistance
316# stainless steel is generally more corrosive resistant to hostile enviroments than 304# stainless steel.
316# is also named as 'Marine Grade Stainless Steel' but it will still show surface corrosion especially if the surface has not been polished after welding or grinding.
Typical applications include:
Food preparation equipment.
Laboratory benches & equipment.
Coastal architectural fixtures and trim.
Boat fittings.   
Litterbins, planter tubs, street furniture subject to corrosive environments.
Woven or welded screens for mining
F asteners and  Springs.
  CA7 Ashtray

Cleaning and maintenance of Stainless Steel

Stainless Steel is selected because of its inherent corrosion resistance, workability and its attractive appearance.  Regular maintenance and cleaning of all types of stainless steel is required to keep these attractive attributes.  Stainless steel must be kept clean for a long material life.
What factors affect maintenance ...
Selection of the correct type of stainless steel for the environment is a necessary pre requisite.
Swimming pool and beachfront areas generally require higher grade 316# stainless steel. Other areas 304#.
Dirty, smoggy or industrial environments will require more frequent cleaning programs as will high humidity marine environments.
Strong bleaches and chloride based cleaners should not be used on 304# stainless steel.
To keep the original appearance stainless steel must be cleaned when it looks dirty.
Cleaning Frequency...
Internal areas: As required by appearance.
External areas - Non Corrosive: 6-12 mths or as required by appearance.
External areas - Urban: 3-6 mths or as required by appearance.
Coastal areas 316# recommended: 6-12 mths or as required by appearance.
Types of Cleaners...
For routine cleaning ph neutral soap and water is sufficient applied with a sponge or cloth.
Fingerprints are best removed using  '3M stainless steel cleaner'. 
Stains and discolourisation generally require the use of a scotchbrite pad to brighten the material and then the application of a cleaner such as '3M stainless steel cleaner' to help protect the stainless steel.

Stainless Planter Tubs
See also:

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