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Refractory Metal Tubes
Seamless
light-wall niobium, molybdenum and molybdenum-based alloy tubes
Outside diameter: 6,3-50,0 mm
Wall thickness: 0,1-2,0 mm
Alloy grades: МЧ, МЧВП, МБВП, and niobium
Outside diameter tolerance limits:
|
Outside diameter tolerance |
|
Nominal Diameter |
Tolerance Limits |
|
Class I |
Class II |
|
6,3 |
-0,10 |
-0,18 |
|
7,0 |
-0,12 |
-0,20 |
|
8,0 |
-0,12 |
-0,20 |
|
9,0 |
-0,12 |
-0,20 |
|
10,0 |
-0,12 |
-0,21 |
|
11,0 |
-0,12 |
-0,22 |
|
12,0 |
-0,12 |
-0,22 |
|
13,0 |
-0,12 |
-0,23 |
|
14,0 |
-0,12 |
-0,23 |
|
16,0 |
-0,13 |
-0,25 |
|
17,0 |
-0,14 |
-0,26 |
|
18,0 |
-0,14 |
-0,27 |
|
20,0 |
-0,15 |
-0,30 |
|
21,0 |
-0,16 |
-0,32 |
|
22,0 |
-0,19 |
-0,34 |
|
23,0 |
-0,19 |
-0,35 |
|
24,0 |
-0,19 |
-0,36 |
|
25,0 |
-0,20 |
-0,38 |
|
26,0 |
-0,20 |
-0,39 |
|
28,0 |
-0,21 |
-0,42 |
|
29,0 |
-0,22 |
-0,44 |
|
30,0 |
-0,23 |
-0,45 |
|
31,0 |
-0,24 |
-0,47 |
|
32,0 |
-0,24 |
-0,48 |
|
40,0 |
-0,24 |
-0,48 |
|
45,0 |
-0,25 |
-0,50 |
|
50,0 |
-0,25 |
-0,50 |
Wall thickness tolerance limits:
|
Wall thickness |
|
Nominal Thickness |
Tolerance Limits |
|
Class I |
Class II |
|
0,10 |
±0,02 |
±0,03 |
|
0,20 |
±0,02 |
±0,04 |
|
0,30 |
±0,03 |
±0,05 |
|
0,40 |
±0,04 |
±0,06 |
|
0,50 |
±0,05 |
±0,07 |
|
0,60 |
±0,06 |
±0,08 |
|
0,70 |
±0,06 |
±0,08 |
|
1,00 |
±0,08 |
±0,10 |
|
1,50 |
±0,12 |
±0,15 |
|
2,00 |
- |
±0,25 |
Chemical Analysis:
|
Component |
Rate |
|
Steel or Material Grade |
|
Niobium |
МЧ |
МЧВП |
МБВП |
|
Niobium mass fraction |
not less than
99,8440 |
- |
- |
- |
|
Molybdenum mass fraction |
- |
not less than
99,9430 |
not less than
99,9172 |
99,8737-
99,8537 |
|
Boron mass fraction |
- |
- |
- |
0,0050-
0,0250 |
|
Mass fraction of impurities, not more |
|
Aluminum |
- |
0,0040 |
0,0040 |
0,0020 |
|
Iron |
0,0050 |
0,0140 |
0,0140 |
0,0110 |
|
Nickel |
- |
0,0050 |
0,0050 |
0,0050 |
|
Silicon |
0,0050 |
0,0140 |
0,0140 |
0,0140 |
|
Calcium+magnesium |
- |
0,0050 |
0,0050 |
0,0050 |
|
Carbon |
0,0100 |
0,0150 |
0,0300 |
0,0038 |
|
Oxygen |
0,0100 |
- |
0,0050 |
0,0050 |
|
Hydrogen |
0,0010 |
- |
0,0008 |
0,0005 |
|
Nitrogen |
0,0100 |
- |
0,0050 |
0,0050 |
|
Tantalum |
0,1000 |
- |
- |
- |
|
Titanium |
0,0050 |
- |
- |
0,0700 |
|
Tungsten+Molybdenum |
0,0100 |
- |
- |
- |
Mechanical Properties:
|
Tube diameter, mm |
Wall thickness, mm |
Tensile Strength, MPa/kg/mm2, not less |
Elongation, %,
not less |
|
6,3
to
12,0 |
all sizes |
686 /70/ |
15,0 |
|
13,0
to
14,0 |
all sizes |
686 /70/ |
8,0 |
Materials of the Future. Refractory
Metal Tubes
A growth trend of high-technology and
science intensive production share in the world economy keeps on
strengthening. Today competitive ability of an individual
enterprise and even of the whole trade directly depends on the
use of qualitatively different production raw materials. They
are so-called “materials of the future”. It is generally
accepted to refer production of refractory metal tubes (RMT) to
that group of materials (RMT: chromium, molybdenum, tungsten,
tantalum, and niobium).
Aerospace technology, aviation, nuclear power engineering,
defense industry, mechanical engineering, electronics and
electrical engineering, medicine, glass manufacturing … None of
these industries can do without refractory metal tubes. They are
an engineering structural material leaving no alternative in
manufacturing of parts and components for special machinery to
be operated in corrosive environments and at temperatures above
1000 °С.
Dnepr-GL is the only company in Ukraine and CIS specialized in
production and sales of refractory metal based alloy tubes.
Together with leading scientific authorities in that field the
Company established a high-technology science intensive
production of refractory metal tubes on the basis of its own
manufacturing capabilities. Normative-technical and
technological documents for all product types were drawn up by
Ya.Yu.Osada Scientific Research Tube Institute (SE VNITI)
personnel.
Tubes are produced of certified billets only. The enterprise
uses high-precision special-purpose equipment, vacuum
heat-treatment facilities, employs state-of-the-art chemical
treatment and end product finishing technologies. A tough
quality control system has been implemented and maintained.
Dnepr-GL has a turnaround technological complex necessary for
RMT production. Process flow includes ingot conversion into
hot-rolled billets and their deformation to final dimensions by
cold rolling and drawing. The Company produces marketable
products, which are fully ready for service and do not require
any additional treatment.
High-precision technologies enable Dnepr-GL to produce
light-wall and ultra light-wall tubes, including capillary tubes,
of any steel grades, including refractory metals (tungsten,
molybdenum, tantalum, niobium and their alloys). Basic product
mix comprises tubes dia. 0,15 mm to 35mm with wall thicknesses
0,05 mm to 10 mm.
Marketing research carried out by Dnepr-GL specialists showed
that a present-day market of refractory products develops quite
dynamically. Rapid development of robot technology and
instrument engineering, electronics, automobile production,
chemical and petrochemical industry, aerospace and military
industries, implementation of technological innovations promote
a demand for tubular products of this segment. Thus, for example,
annual demand of Russian enterprises for molybdenum tubes alone
is over 1000 kg.
During the last 2 to 3 years the market grows basically owing to
enterprises of military-industrial establishment. A rapid
increase can be observed in production and use of tungsten tubes,
tubes of “metal of the future” titanium, and zirconium tubes for
nuclear power engineering.
Customers of Dnepr-GL Group of Companies are represented in
Ukraine by such industrial giants as Makarov SE PA UMZ (Uzhmash
Production Association State Enterprize) (Dnepropetrovsk),
Antonov ASTC (Antonov Aeronautical Scientific/Technical Complex)
(Kiev), Zorya-Mashproject (Nikolaev), Novokramatorskiy Machinery
Plant CJSC (Novokramatorsk), Kiev Aircraft Plant AVIANT (Kiev),
Motor-Seech OJSC (Zaporozhye), Kharkov Aircraft Plant (Kharkov),
which are well-known in the world for their products, as well as
by dozens of big and small enterprises in Russian Federation,
FRG, Denmark, Israel, Georgia, Armenia.
We offer you our high quality tube delivery of any configuration,
optimum delivery time and flexible pricing policy.
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