|Aluminum alloys have become very popular for all types of fasteners because of their high strength-to-weight ratio, the ease of working with them, and their resistance to both chemical and atmospheric corrosion.
|Brass is one of the most widely used of the copper alloys and consists of 70% copper and 30% zinc. It is malleable and ductile and has excellent cold-working, but poor hot-working and machining properties. It is excellent for soft-soldering; good for silver alloy brazing or oxyacetylene welding, but fair for resistance or carbon-arc welding. It is used for drawn cartridges, tubes, eyelet machine items, and snap fasteners.
|Bronze is an alloy containing 90% copper and 10% tin. It is somewhat stronger than copper and brass, and has equal or better ductility. It is used for screws, wire, hardware, wear plates, bushings, and springs.
|Hastelloy® is a trade name for a series of high-strength, nickel based, corrosion resistant alloys. Other components include molybdenum and chromium. It is well suited for most chemical applications. It has excellent resistance to pitting, stress-corrosion cracking, and oxidizing atmospheres to 1900° F.
|Monel® is a trade name for a series of high-strength, nickel-copper alloys, which have been found to be highly resistant to atmospheric corrosion, salt water, and various acid and alkaline solutions.
|Naval bronze is basically brass with a small addition of tin for corrosion resistance against salt water. It is widely used in the marine industry.
|Nylon is resistant to heat, shock vibration, and chemicals. It is light weight, self-extinguishing, and is UL-approved. Because of the ease which nylon is molded, almost all the fasteners that are made in metal are made in nylon.
|Silicon bronze is an alloy made of 95% – 98% copper, plus a small amount of silicon added for strength. Small amounts of manganese and aluminum may also be added for strength; and lead may be added for machineability. It is non-magnetic, with a high degree of thermal conductivity and high corrosion resistance against sea water, gases, and sewage.