Sandvik Ab

Sandvik Intellectual Property Ab

Edmeston Ab

Goran Berglund

Pasi Kangas

Ulf Eriksson

Sina Vosough

Gosta Lyen

Torsten Westberg

Bertil Walden

Michael Nicholls

A string for musical instrument is disclosed, the string formed from precipitation hardening stainless steel, where Ti has been added to improve the precipitation hardening properties. The string has a superior resistance to relaxation and is corrosion resistant, thus improving its tuning stability and maintaining its tone quality, thus prolonging its service life.

Music string

Recuperator for furnaces

Carbon black is produced by burning a mixture of air and oil to produce hot gases and then conducting the hot gases through tubes extending through a chamber of a heat exchanger. Heat exchange air is conducted through the chamber in a direction opposite the direction of gas flow, in heat-exchange relationship with the tubes, to pre-heat the air. The pre-heated air is then mixed with the oil to be burned. Prior to entering the chamber, the air is conducted within a hollow section of the wall structure of the heat exchanger to transfer heat from a hot end of the wall structure toward a cooler end thereof.

Heat exchanger adapted for the production of carbon black

A duplex stainless steel alloy has been provided which contains in % by weight:

Ferritic-austenitic stainless steel

A coupling connects a valve structure to a container for enclosing pure gas under high pressure. The neck of the container and the valve structure include cooperating contact surfaces. One of the contact surfaces is convexly curved, or alternatively is of frusto-conical shape. The other of the contact surfaces is of convex spherical shape. A sealing ring is compressed between those contact surfaces. The inner surface of the container is polished to achieve a high degree of smoothness. The container is formed of a top part, and a bottom portion welded to an intermediate mantle.

Gas container, a coupling for a gas container, and a method of making a

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Sandviken, Sweden

Goran Berglund