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DETERMINE TYPE OF MATERIAL
There are three base materials from which hinges
are manufactured: Steel, Stainless Steel, and Brass. Each base
material has different qualities.
Steel- This has great strength but it is a
corrosive material. If the atmosphere that steel is used in is not
stable, steel will begin to rust. The best application for steel is
in a controlled environment, such as inside a building where the
temperature and humidity are controlled.
Stainless Steel- This also has great strength. It
is rust resistant and has decorative value in that it can be
polished to a satin or bright finish. Hager uses type 304 stainless,
which meets the BHMA 156.1 standard for salt spray exposure of 200
hours. In coastal areas, salt and sodium chloride can cause
localized surface corrosion. This condition is restricted to
discoloration and blemishing of the surface. Under severe
conditions, pitting type corrosion can be exhibited.
Brass-This material in no corrosive, rust
resistant and vary decorative. However, it has less strength than
the steel or stainless steel material. Brass is often used where
appearance is of great concern as it may be polished and plated in
various finishes.
Both steel and stainless steel hinges may be used
on listed fire rated or labeled door openings. Brass material may
not be used on fire rated or labeled openings because of the low
melting point.
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