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developments
products &
Brück is a manufacturer of seamless
rolled rings up to 5,400mm outer
diameter and forgings up to 4,000mm
outer diameter, with maximum weight
of 27 tons, to national and international
standards in more than 1,000 material
grades, including low-high alloy steel,
carbon steel, stainless steel, super-
duplex, nickel alloys, titanium and
aluminium.
The company has a production capacity
of approximately 200 tons/day, with four
forging-presses and five ring-rollers.
The company is EN ISO 9001:2000
and Pressure Equipment Directive PED
97/23/EC annex 1 part 4.3 certified, and
also has the Framatome approval for
Nuclear Facilities.
From the end of 2008 the company will
have a new 8,000 ton forging press,
which will increase its production ability
to 40/50 ton forgings and rings.
Brück – Netherlands
G Rau GmbH & Co KG is a specialist
in innovative metal solutions, and a
preferred supplier to renowned com-
panies active in various fields of electrical
engineering, the automotive supplier
industry, and measurement and control
engineering. The company’s subsidiary,
Euroflex, which was founded in 1993, is
a leader in semi-finished products in the
field of medical engineering.
The company specialises in the
production of high precision semi-
finished products made from precious
metals, stainless steels, special alloys
and composite materials, as well as in
the production of parts and assemblies.
The company offers tubes from stainless
steels 1.4301 304, 1.4571 316 Ti, and
1.4441 316 LVM (surgical implants), with
a seamless or welded finish, as well as
all common austenitic alloys, depending
on the quantity purchased. The outer
diameter dimensions range from 0.5
to 12mm (in exceptional cases up to
20mm, wall thickness > 0.3mm), with a
wall thickness range of 0.04 to 0.30mm,
depending on the ratio of outer diameter
to wall thickness.
Seamless rolled
rings and forgings
Narrow tolerance tube production
The tolerance requirements for stainless
steel tubes are continually increasing.
As most seamless stainless steel
precision tubes are manufactured by
drawing processes, there are natural
limits to the attainable dimension
accuracy. This becomes especially
apparent when tubes with larger outer
diameters relative to the wall thickness
are manufactured.
In response to the increased demand
for large, thin-walled stainless steel
tubes with narrow tolerances, G Rau
has developed a new procedure that
enables the production of such tubes: for
OD ranges from 0.5 to 8mm, ±0.02mm
tolerance; OD 8 to 12mm, ±0.03mm;
wall thickness ±5% standard, minimum
±0.01mm. Other tolerances are available
on request. The company’s stainless
steel tubes are available in soft, hard
or special strength conditions, usually
in lengths of 3-4m, or fixed lengths
according to customer specification.
G Rau GmbH & Co KG – Germany
Photo – Osborn Tubes
see page 20
18 Tube Products International April 2008