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The company which purchases the APT will then continue the process of chemical refining. The end result of the refining process is high purity tungsten powder. Tungsten is sometimes used in powder form, but very often it must be consolidated into a solid form.

To consolidate tungsten powder it may be blended with a binder and very small amounts of other materials that will provide desired properties to the finished product. The most common method of consolidation is sintering. Tungsten powder is pressed into cakes or fragile bars which are heated in a furnace until the particles adhere to one another.

The bar is then placed in a sintering bottle for further heating. Electric current is run through the bars until they become extremely hot, and the individual tungsten grains merge together and form a solid part. During this process the bar shrinks and becomes more dense. The bar is not yet fully dense and lacks other desirable properties such as ductility and high tensile strength that will be gained as the material is drawn or rolled into final form.

During the process the tungsten is further compacted, becoming more dense, and the crystal structure of the tungsten is manipulated in order to improve physical properties. Tungsten alloys are made in a similar fashion, but are blended with up to ten percent of a combination of nickel and iron or copper.

These metals serve as the binder to hold the tungsten particles in place after sintering. The alloys do not require millwork to enhance properties in the same way that pure tungsten does, but may be worked anyway to achieve desired shape. These heavy metal alloys are quite useful for many purposes and are machined much more easily than pure tungsten.

There is no one answer as there are many variables that can contribute to the final price of any given tungsten product. First, there are market considerations. What is the going rate for tungsten ore, tungsten powder, or APT? The London Metals Bulletin can provide these prices on a timely basis. The standard pricing unit for tungsten trading is the mtu or metric ton unit. Tungsten chemicals, tungsten powder, tungsten plate, tungsten wire , and tungsten rod would each have a different price per kilo cost.

This is a function of the raw material cost and of the amount of work involved in producing the finished product. As this TIPs goes to press , tungsten pricing is on the rise. Historic postcards of Marie Valerie. Elektra is an electric powered passenger vessel for 21 passengers.

Image of Elektra Photo: Traunstein 2 was sold to the Attersee in and renamed in Hochlecken , and later Schloss Kammer.

Postcard of Traunstein 2. Image of Schloss Kammer on Attersee in Photo: Ludgard was a passenger vessel for around 45 passengers built in at the Engelbrecht shipyard in Berlin for private use on the Traunsee.

In it was purchased by the Traunsee-Motorboat-Gesellschaft and was rebuilt in and renamed Stadt Gmunden. Still in public service as charter boat in Postcard of Ludgard and Lenau. Image of Ludgard as Monika Photo: Sonnstein and Karbach were built in by Lürssen of Vegesack and were electric powered via batteries which had a 10 hour duration. They carried 80 passengers. Feuerkogel was built to a similar design between but had a Mercedes 6-cylinder diesel engine. Feuerkogel was sold to Heilbronn River Neckar in October and was renamed Neckarperle in and was rebuilt in Neckarperle is still in service in Postcards of Sonnstein or Karbach.

Feuerkogel in at Gmunden Photos: Feuerkogel as Neckarperle at Heilbronn Photo: Lenau was a diesel-passenger-vessel for 80 passengers built in in Vienna for service on Neusiedler See. Lenau was purchased for service on Traunsee from Image of Lenau after withdrawal Photo: She late worked at Kiel and was taken over by the Wehrmacht in and rename Schwalbe.

Purchased for use on Traunsee in and renamed Rudolf Ippisch , this attractive motor vessel remains in the fleet as a 'nostalgisches Motorschiff ', mainly for small charters. I travelled on Rudolf Ippisch in when she deputised for Gisela due to poor weather. Postcards of Rudolf Ippisch. Rudolf Ippisch in Photo: Rudolf Ippisch in at Gmunden Photos: Christina was built by Ijgwitz, Vienna, in as the Wien.

Acquired in , she entered service in with a Mercedes engine previously used in Feuerkogel. Later rebuilt with improved accommodation, Christina was renamed Gmunden. Postcard of Christina with Elisabeth behind.

Gmunden , ex- Christina in at Gmunden Photos: Brought to Traunsee in and rebuilt as Grünberg for entry into service in Passenger capacity was Grünberg in at the Traunstein Photos: Grünberg in at Gmunden Photos:

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