Letter 33015

Stainless steel finish classification  

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What is the classification system used to classify the stainless steel finish? What is the difference between mirror finish, brush finish and hairline finish of stainless steel?How we can measure these finishes?

Jose Thoams
Steel Fabrication - Dubai, UAE

Appearance and measurements are not necessarily compatible. Meaning, you can can have some very bright looking parts and still have a rather rough surface metal profile or a smooth surface profile and a dull finish. For measuring surface profile, there is a small measuring device called a profilometer that measures peaks and valleys of the metal. Appearances are more subjective.

AF Kenton Nova Finishing Systems Inc. Huntingdon Valley, PA

Stainless Steel finishes are very clearly defined in ASTM (American Society of Testing & Materials) A480 [link is to spec at TechStreet] Specification. So, please refer to that document.

J N Dutta
- Kuwait

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