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What is Metglas?

show answer » Metglas is an amorphopus metal, Amorphous metals do not have crystalline structure like other magnetic materials. All the atoms in an amorphous metal are randomly arranged, thus giving it a higher resistivity (about three times) value than that for crystalline counterparts. Amorphous alloys are prepared by cooling the melt at about million degrees per second. This fast cooling does not give the atoms enough time to rearrange into stable crystalline form. As a result one gets metastable amorphous structure. Because of the absence of crystalline structure amorphous alloys are magnetically soft (lower coercivity, lower core loss, higher permeability,...). High resistivity gives lower loss at higher frequencies. The losses are among the lowest of any known magnetic materials.

Where is Metglas manufactured?

show answer » Metglas ribbon and pulse cores are manufactured in the Conway, SC, USA facility.

Where would one locate technical and or purchasing information related to Metglas cores?

show answer »

As of March 26 2011 Metglas' parent company, Hitachi Metals America Ltd has assumed responsibility for sales and support of the C-Core and EC-Core product lines.
These products include:
AMCC Cut Cores
Mag Amp Cores
Microlite Cores
Magna Perm Cores
Power Factor Correction Cores
Sensing Cores
Laminated Magnetic Cores

All products remain unchanged only the order routing has been modified.
Correspondence Address for Inquiries:

Hitachi Metals America Ltd.
2101 S. Arlington Heights Road Suite 116
Arlington Heights IL 60005
Phone: 847-364-7200 (Main/General)

What are the sizes and shapes of the Metglas products?

show answer » Metglas products are cast in ribbon form. Width and thickness of the ribbons are alloy dependent ranging from .65 mils (16 microns) to 3 mils (75 microns) in thickness and a maximum width of 8.4 inches (215 mm). The material is flexible (the edges are sharp), it can be wound, punched, stamped, laser etched, EDM'd, stacked and laminated or slit.

More information on Magnetic Materials

More information on Brazing Filler Metals

Is the Metglas product available in rod, plate or bar form?

show answer » To make Metglas Amorphous Metal Ribbon, the rapid solidification ( cooling ) of the ribbon is key to the creation of the unique magnetic properties. It would be impossible to create anything other than ribbon form with the same magnetic benefits as our ribbon.

The ribbon can be stacked and laminated to create forms or bars. and further custom shaping processes can assist you in attaining the desired shapes that you may be seeking

Can I get a micrographs of metallic glasses?

show answer » We are unable to offer you a micrograph of a metallic glass alloy. Such photos are, in fact, rare. The reason is that metallic glass alloys have amorphous, or non-crystalline, atomic structures. This is in contrast to the perfectly ordered, crystalline atomic structure in traditional metals. As a result, metallic glass alloys are void of microstructure in the traditional metallurgical sense. The micrograph of a metallic glass is a plain, featureless image. Hence, they are rarely recorded. The reasons for the featureless metallurgical structure are as follows.

Micrographs of crystalline alloys generally exhibit three distinct features. The most prominent of these features is the grain boundary, where one region of perfectly ordered atoms meets, but is not perfectly aligned with, another region of perfectly ordered atoms. The grain boundary, which is situated at the interface of the two perfectly ordered regions, is the result of the mismatch. Metallic glasses have no crystalline structure. Hence, there are no mismatched interfaces and no grain boundaries.

A second feature of traditional metallurgical structures is the contrast between the primary and secondary phases, that is, between regions with different chemistries and/or structures. Metallic glasses are single phase, solid solutions. Hence, there are no secondary phases.

A third feature that may be present in traditional microstructures is a crystal defect such as a twin or a dislocation. With no crystalline structure, the metallic glass do not possess such defects.

Can you please explain pack factor?

show answer » Pack factor is the percent volume (or fraction) occupied by the magnetic material in the core. Thicker laminations exhibit higher pack factor. Our material, with max thickness of 25 um, exhibits a pack factor in the range of 82~88%. The pack factor is also proportional to the width of ribbon. Wider strips exhibit lower pack factor relative to narrow strips. C and E cores are manufactured from narrow strips hence the core pack factor may be >84%.

Why should I buy Metglas vs. Ferite Cores?

show answer » METGLAS alloys can be annealed to obtain square, round or completely sheared BH loops. This is not the case with ferrites. Amorphous alloys can give linear, sheared BH loops which are useful in current measuring devices. Many of the amorphous alloys have higher saturation induction and Curie temperatures. Higher saturation induction translates into smaller core. Higher Curie temp makes it possible to use the amorphous cores at higher operating temperatures.

How many years have Metglas products been provided commercially?

show answer » Metglas products originated in Morristown, NJ, USA in 1972. They were produced for some time in Parsipany, NJ, USA and since 1989, in Conway, SC, USA.

How long does it take to produce custom parts?

show answer » Customer core designs depend on on specifications provided. For customer designs please enter a sample or technical request with as much detail about the operating parameters of you design as possible. A Metglas representative will contact you.

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