Sheet/Plate Polishing

Stainless steel sheet or plate polishing is a service offered by Vecom Sillavan Metal Treatment, or VSMT.

Cardiff Bay Water Feature; 316 Stainless Steel Sheet was used on this project. The sheets were ‘240/S’ polished at Vecom Sillavan

The sheet and plate polishing facilities are located in Bury, Greater Manchester, in the UK.

With high quality mill product, it is usually possible to polish sheet metal with the final belt needed to obtain the desired finish. However, in the case of hot rolled metal it is essential to pre-grind with coarse grits to remove the rough surface and defects before continuing to work towards the specified finish. It is essential to remove the effects of the previous grit before proceeding with the next, otherwise the surface features will be unsatisfactory.

The surface condition required of plate is usually driven by the process requirements in service rather than any aesthetic consideration, hence plate polishing invariably involves at least the measurement of Ra.

It is in some of the difficult environments that plate is used that the more complex surface measurement parameters are involved, especially nuclear applications.

Plate can be polished right through to a ground and bright finish. This can obviously be an expensive process.

However, it is still much cheaper than hand polishing a finished fabrication. In addition any major problem with the plate is detected at an earlier stage.

Some examples of polished finishes are tabulated below:

VSMT code

BS1449/EN10088-2

Ra µm (approx.)

Reflectivity % (600 approx.)

Coarse Ground 80 Grit

3A/2G

2.5

10

240/1 Alumina Sheen

3B/2J

1.0

10

Supersatin

3B/2J

0.8

10

240/S Silicon satin

No. 5/2K

0.4

30

Superblend

No. 5/2K

0.4

30/40

Long Grain Brush

No. 5/2J/2K

0.2

35/45

Bright Polish

No. 7/2P

0.05

53/60

Superbright

No. 7/2P

0.05

58/63