Zirconium Fastener : Manufacturer, Stockiest and Supplier : Kinnari Steel

Zirconium Fasteners

Zirconium is a chemical element with symbol Zr and atomic number 40. The name of zirconium is taken from the name of the mineral zircon, the most important source of zirconium. The word zircon comes from the Persian word zargun , meaning “gold-colored”. It is a lustrous, grey-white, strong transition metal that resembles hafnium and, to a lesser extent,titanium. Zirconium Fastener is mainly used as a refractory and opacifier, although it is used in small amounts as an alloying agent for its strong resistance to corrosion.

Zirconium Fastener are typically used in corrosive services too severe for stainless steels, nickel alloys, and titanium or where a significant improvement in service life is required. Zirconium Fastener have outstanding corrosion resistance to hydrochloric acid, sulfuric acid, organic acids, nitric acid, acetic acid and alkaline media such as sodium hydroxide. In these extremely corrosive media, Zirconium Fastener are only surpassed by tantalum fasteners.

While Zirconium Fastener are extremely corrosion resistant to hydrochloric acid, they are not resistant to hydrochloric acid containing oxidizing species such as cupric chloride, ferric chloride, or wet chlorine. Zirconium Fastener also has poor resistance to concentrated sulfuric acid, hydrofluoric acid, concentrated phosphoric acid, ferric chloride, cupric chloride, wet chlorine, and other oxidizing chloride environments.

Common Zirconium Fasteners Grades

Zirconium 702

99.2% commercially pure zirconium with the highest corrosion resistance.

Zirconium 705

95.5% zirconium with the addition of 2-3% niobium. This addition increases the impact strength of the alloy.

Mechanical Properties

Zirconium 702 – Tensile Data
Temperature(F)	Ultimate Tensile (ksi)	Yield Strength at 0.2% Offset(ksi)	Elongation
Room temp	68	47	29
200	53	39	32
300	44	28	32
400	33	20	49
500	29	19	49
600	29	14	40
700	22	12	44