ASTM B776 Hafnium Sheet

About this item:

ASTM B776 hafnium sheets are produced by hot/cold rolling on a reverse rolling mill. Cold-rolled hafnium sheets have a metallic bright surface as rolled. The oxide skin of a hot-rolled hafnium plate can be mechanically descaled or pickled. Both the hafnium plate and sheet are even by leveling and have a defects-free surface condition.

 

Our products can reach a purity of Zr+Hf 99.95% minimum with the content of Zr 1% maximum.

 

Hafnium is a heavy, steel-gray metal in the reactive metals group that is very closely related to zirconium, and forms a continuous

 

solid solution at all concentrations of zirconium and hafnium. Hafnium occurs naturally with zirconium at a ratio of approximately 1:50 and is produced exclusively as a co-product of nuclear-grade zirconium. It is used in a variety of applications where few substitutes are available.

 

Hafnium and zirconium have nearly opposite nuclear properties; thus with their relatively high thermal neutron cross-section,

 

Hafnium's biggest application is as control rod material in nuclear reactors. In this application, the presence of a few percent of zirconium (< 4.5%) does not adversely affect its performance.

 

When used in relatively small amounts, hafnium strengthens the grain boundaries of nickel-based super-alloys and high-temperature alloys, improving the creep ductility and rupture lifetime. It is extensively used in some alloys that find use in the hot end of jet engines. Hafnium has an extremely high affinity for oxygen, nitrogen, and carbon, and is one of the most effective

 

solid-solution strengtheners via dispersion strengthening.

 

Like the other reactive metals, hafnium is HCP (Hexagonal Close-packed) at room temperature and anisotropic. Even more than zirconium or titanium, the mechanical properties of hafnium are affected by interstitial element contamination. In many applications, a very low interstitial content may be necessary to obtain the required ductility or other properties. For such critical applications, the iodide crystal bar process is used by ATI to produce hafnium with a typical oxygen concentration of 60 ppm or less. Hafnium is also used extensively as a tip insert for plasma welding tips. With a low work function and a high melting point, hafnium has been found to extend the life of plasma welding tips and give better performance.

 

Its behavior in corrosive media is very similar to that of zirconium, and in the absence of data can be considered to be roughly equivalent. The general applications include nuclear reactor control rods, neutron absorption, alloy additives in various superalloys, and plasma torch welding tips. Hafnium is available in common mill forms including plate, sheet, foil, rod, and wire. Hafnium metal is also available in several forms for alloying. For higher purity applications, where low oxygen and nitrogen content are especially critical, a crystal bar is produced with a typical oxygen content of less than 60 ppm. It is available in chunk form (chopped bars), whole bars, or milled chips. Where crystal bar chemistry is desired, but for less critical applications, tip material is available as an unqualified crystal bar. Hafnium sponge is also available for standard alloying needs.

 

Inspection of ASTM B776 Hafnium Sheet:

Visual inspection to check the surface quality, ensuring it is without any flaws, black dots, or any other defects.

 

Ultrasonic Flaw Detection, making sure there are no defects inside.

 

Chemical Composition Detection, making sure all chemical components can satisfy customers' demands

 

Mechanical Features testing, making sure products have satisfying mechanical features before delivery.

 

Manufacturer Test Certificate

 

Laboratory Test Certificate from Govt

 

A third-party inspection is also available.

 

The hafnium bars, wire, bars, rods, sheets, foil, and wire for sale are of the highest quality and will arrive at your destination quickly when you order. We also offer some of the best pricing in the industry and know you will be satisfied with your purchase.

Standard wooden packages or per the client's request

Delivery: 3-15 working days after having received the payment

As a hafnium supplier, we can provide hafnium sheets cut to your specific thickness requirements. Our hafnium sheets supply includes thicknesses that run from 0.1mm up to 5.0mm.

We provide EN 10204/3.1 certification including chemical and mechanical tests. We can also custom special elements such as oxygen via the vacuumization for hafnium finished products.

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