Stainless steel finishes

The surface of stainless steel can be treated in many different ways. This of course has consequences for the exterior, but also for the cleaning of the material.
In addition to selecting the right alloy for the purpose, the finish and with that the roughness of the surface, is a determining factor for the durability of the stainless steel. It is for this reason for instance that stainless steel for yachts is always finished high polished.

Below you find a broad survey of the possible finishes of van stainless steel:

F2B is a standard sheet finish up to 5-6 mm thickness and is applied practically without exception in places in constructions that are not visible. This material is finish rolled cold and has a low degree of surface roughness.

F2D is the standard finish for thicker plates and has a more crude matt finish.

Glass bead blasting is often applied in case of vessels and constructive frames as applied for instance in the food and candy processing industry. The exterior looks smooth and aluminium like. The welding colours and small damages disappear. Read more >> 

Pickling and passivating are executed in a bath or by spraying. During the process of pickling the welding colours and pollutions of the material are removed and during the passivation process a new skin is formed. This process is particularly applied in case of constructive elements.

Electrolytic polishing like pickling and passivating is done in a bath. Usually these products too subjected to a pickling and fixing process first. The pre-processed material usually is fine grinded and finished brushed matt. The skin formed is very resistant against exterior influences. Welds are made visible in this process.  

K320SC (Grit 320 Silicon-Carbide) is a standard stock finish for sheet metal with a very low degree of surface roughness. Very suitable for, among other applications, wall panels and sheeting. Welded parts are touched up by grinding and matt brushing which creates a difference in finish. The grit (320), as for sanding paper, indicates the roughness.

Matt brushing or fine brushing is a more luxurious finish then K320SC as there is no visible difference between the basic material and possible final processing. Scratches and damages are less visible. Touching up later is easier here then in case of K320SC.

Random-ground is very popular among architects. It is a ‘different' matt finish of stainless steel and can also be touched up easily in a later stage.

Bright Annealed is a shining factory-finish that is achieved by rolling. Usually this sheet is subjected to buffing and polishing as finishing process, as commonly applied for Italian products.

High-polish finish is a general term for polishing. The degree of finishing can be anywhere between polished and super mirror 8. In fact this finish can only be determined by using a representative sample.

Super mirror 8 is an expensive high polish finish of very high quality the result of which can be compared with a mirror.

Wafer patterned is a stainless steel sheet with a chequered pattern achieved by rolling or pressing. Different patterns are commercially available. The finish usually is polished.

Leather patterned is a stainless steel sheet with a curly pattern achieved by rolling or pressing. Here too the patterns may vary. The finish can be polished or passivated.

Linen patterned is a stainless steel sheet with a pattern achieved by rolling. Here too the patterns may vary. The finish can be polished or passivated.

Engine turned is a type of sheet commonly applied on cold-stores in butcheries but also for architectural designs.

There are many thousands of types of patterns for sheets, particularly from Japanese, German and American suppliers providing patterns achieved by etching and colouring often applied in elevator cladding. Processing possibilities for such sheets are limited.

 

 

K320SC grinded
K320SC grinded (nr.3)