Compression Springs,Extension Springs, Helical springs,Coil Spring

Music Wire .003-.250 A high-carbon steel wire used primarily for applications
demanding high strength, medium price, and uniformly high quality. Guitar and
piano strings are made from this material, as are most small springs. Music
wire will contract under heat, and can be plated.

Oil Tempered Wire (OT) .010-.625 This is the workhorse steel spring wire,
being used for many applications in which superior strength or uniformity is not
crucial. Will not generally change dimensions under heat. Can be plated. Also
available in square and rectangular sections.

Chrome Silicon, Chrome Vanadium .010-.500 These are higher quality,
higher strength versions of Oil Tempered wire, used in high-temperature
applications such as automotive valve springs. Will not generally change
dimensions under heat. Can be plated.

Stainless Steel .005-.500 Stainless steels will not rust, making them ideal for
the food industry and other environments containing water or steam. 302
series stainless will expand slightly under heat: 17-7 will usually not change.
Cannot be plated.

Inconel, Monel, Beryllium Copper, Phosphor Bronze .010-.125 These
specialty alloys are sometimes made into springs which are designed to work
in extremely high-temperature environments, where magnetic fields present a
problem, or where corrosion resistance is needed in a high-temperature
working environment. They are much more costly than the more common
stocks and cannot be plated. Generally will not change dimensions under heat.

Titanium .032-.500 Used primarily in air- and spacecraft because of its
extremely light weight and high strength, titanium is also extremely expensive
and dangerous to work with as well: titanium wire will shatter explosively under
stress if its surface is scored. Generally will not change dimensions under
heat. Cannot be plated.