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 Vacuum
Select Plate PDF file - English
Vacuum
Select Plate PDF file - Chinese
VSP = Vacuum Applications
The cleanest stainless plate available
Sandmeyer
Steel Company's Vacuum Select Plate (VSP) incorporates
quality controls every step of the way to ensure the
highest possible internal cleanliness for the most demanding
vacuum applications.
VSP = Controlled melting and
casting
- Raw materials are air-melted in an
electric arc furnace and refined in an argon oxygen
decarburization or vacuum oxygen decarburization unit.
- Molten stainless steel is cast into
slab using the continuous casting process.
- During casting, turbulence within
the tundish created by the feed stream from the ladle
can be a major source of internal cleanliness problems
in steel. When making VSP material, Sandmeyer controls
this by carefully selecting a melt source with a tundish
that holds a large enough volume of liquid metal to
sufficiently dampen the turbulence caused by the feed
stream.
VSP = Special identification and
testing controls after casting
- Sandmeyer purchases full heats of continuous
cast slabs and then rolls its plate from these slabs.
Stringent identification procedures from casting through
final rolling allow Sandmeyer to identify the slab
from which every single plate has been rolled. Only
plates rolled from select slabs located in the cleaner
center of a cast are qualified as VSP material.
- VSP material is routinely subjected
to and passes inclusion testing that is performed
by an independent laboratory in accordance with the
standard practice for determining inclusion content
of steel, ASTM E-45 Method A.
- Finally, "step-down" testing
is performed on VSP material on a routine basis by
cutting circles from opposite corners of a plate,
machining steps on the faces at 1/16" increments,
and closely examining the machined surfaces for sub-surface
defects.
VSP = The material for vacuum
applications
For your toughest vacuum and semi-conductor
applications - call Sandmeyer and ask for Vacuum Select
Plate.
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