Other Materials

Features and applications of other common materials

Alloy Principal Design Features

Aluminum Alloys

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 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 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® 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® 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 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 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 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.