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Metals
 Stainless
Steel is the material most selected by our
customers. Global Stencil
utilizes 300 series stainless steel.
Typically
301/302 stainless steel
is purchased per AMS-5517k/ASTM-A-666-00. In most cases the
condition used is "Full Hard, "tension leveled". This enables the stencil to maintain
a smooth, flat posture that "gaskets" well with the circuit
board during the printing process.
Stainless steel is much
harder and resists coining better than other common
materials such as Alloy
42 and withstands the harsh cleaning agents used to clean
solderpaste from the stencil. It is also able to be
electro-polished to aid in solderpaste release and transfer.
Invar,
also known as Alloy 36 has become a material of choice among
our customers printing micro bga, ultra-fine pitch and other
applications where standard stainless steel stencils do not
deliver enough paste volume because of aspect ratio issues.
An alternative to electro-formed stencils, Invar Stencils,
allows our customers to manufacture their product
successfully and not incur the cost and extended delivery
times of expensive electro-formed stencils. This material is
a Nickel/Iron, low expansion alloy in a Hard condition.
Click here
for more detailed information on this exciting metal.
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