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Hafnium stamps

The hafnium wire
Circle, rod
Tape, strip
Sheet, foil
Ideny hafnium
The hafnium cathode
Hafnium carbide

There is nothing more practical than a good theory. V.I. Lenin.

At dawn of last century, Niels Bohr predicted that element number 72, similar to zirconium, would be last rare-earth metal. In 1923, D. Coster and D. de Hevesi discovered this element with properties predicted by Bohr in Scandinavian zircons. And today, zirconium ores remain source of hafnium. Name hafnium received from ancient Roman name of Copenhagen — Hafnia. In 21st century, annual global hafnium production exceeds 70 tons — proportional to production of zirconium. Most hafnium mined Australia and South Africa. Price hafnium 99% purity about $780 per kilogram.

Physical properties

Hafnium (symbol Hf) — heat-resistant silver-steel color metal. Its crystal lattice has hexagonal structure, density exceeds 13 g/cm³. Melting point 2150 °C. Thermal neutron capture cross section is about 100 barn, five hundred times larger than that of zirconium. Therefore, zirconium used for nuclear energy must be cleared of hafnium. Natural isotope 174 Hf is α-active; its half-life is about 2x1015 years.

Atomic number Atomic (molar) mass g/mol Oxidation state

Density [g/cm3]

Melting point t °С Boiling point t °С Heat of fusion kJ/kg
№ 72 178,5 4 13,31 2150°С 5400°С 25,1

Application

Nuclear energy. Ability to capture neutrons causes use of hafnium in control rods of fuel rods, special ceramics and glass (oxide, boride, oxocarbide, carbide, lithium hafnate, dysprosium hafnate). Ta-W-Hf alloy — best for fuel supply in gas-phased nuclear engines.

Optics. Due to heat resistance and very high degree of refraction, HfO2 and HfF4 are used in fiber optics, astronomical and multilayer x-ray mirrors, as well as night vision devices.

Radio electronics. Low electron work function (3.53 eV) allows production of high-power radio tubes and electron guns and effective thermionic electric generators from Hf.

Electrical engineering. Along with heat resistance, small electron work function allows Hf to be used in production of electrodes for argon welding, especially for welding low-carbon steel in CO2 atmosphere, where such electrodes were almost 4 times more resistant than tungsten. We also note great economic effect of use of hafnium-tantalum alloy for electrodes of oxygen-flame and air-plasma cutting of metals. Alloy Hf — 77%, Ta — 20%, W — 2%, Ag — 0.5%, Cs — 0.1%, Cr — 0.4%, nine-fold service life compared to pure hafnium.

Alloys. Addition of 1% Hf to aluminum significantly strengthens alloy, increases the tensile, shear and torsional strength, improves resistance to vibration and shock loads. Hafnium dramatically strengthens cobalt alloys, so necessary in modern processing industries. Hafnium carbide and boride (melting point 3250 °C) are used as part of superhard alloys, in construction of gas-phase atomic boilers and in manufacture of rocket nozzles, as well as wear-resistant spraying. HfB2 + Ni is relevant as extremely durable composite coating. Alloy of hafnium carbide 20% and tantalum carbide 80% is considered most heat-resistant of known materials (melting point 4216 °C).

Engineering. Hafnium-doped titanium alloys form basis of marine engine parts. Addition of hafnium to nickel strengthens alloy, increases corrosion resistance, facilitates welding and seals weld. Addition of hafnium to tantalum leads to formation of complex oxides on surface of protective film, which increase oxidation resistance to heat exchange (thermal shock). Based on alloys of these two metals, materials were created for jet engines — gas rudders, nozzles, etc.

Other applications. Rare earth elements such as terbium and samarium are doped with hafnium when creating powerful permanent magnets. Today, HfO2 dielectrics with high dielectric constant are successfully replacing silicon oxide in computers, allowing much higher chip density. Hafnium dielectric silicide also have significant dielectric constant. Hafnium and scandium alloys are known in microelectronics as basis of resistive films.

Percentage composition

Content of controlled impurities,%, no more

Mark Oxygen Nitrogen Carbon Silicon Iron Zirconium
GFI-1 0,03 0,015 0,03 0,02 0,05 1,0

Promising applications

Hf-178m2 — by-product of nuclear energy (spent absorption hafnium rods in nuclear power plants). This isotope (half-life of 31 years) contains an excess of energy that can be released by irradiation of nucleus. energy contained in 1 g of Hf-178m2 is equivalent to 50 kg of TNT. This can be used to «pump» compact combat lasers and as adjustable source of gamma rays, for example, in flaw detection and as capacious energy source for transport.

Supply

We supply certified hafnium hire. Specification includes data on percentage composition and mechanical quality of products. It is easy to wholesale from us any semi-finished products for large-scale production. We also work with retail customers. High level of service and prompt service are face of our company.

Buy at bargain price

Site of LLC Elektrovek-steel reflects most current information on purchase of rolled metal from rare and refractory metals to date. Experienced managers who are always in touch are ready to provide highly qualified advice on any current issues. We sell semi-finished products from rare and color at competitive price. Products are manufactured using most modern equipment and meet quality requirements of Russian State Standard and international quality standards. Regular customers are given system of discounts.

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    • Gallium
    • Germanium
    • Europium
    • Lantan
    • Tellurium
    • Cerium
  • Lentoid
    • Gadolinium
    • Holmium
    • Dysprosium
    • Ytterbium
    • Lutetium
    • Neodymium
    • Praseodymium
    • Samarium
    • Terbium
    • Tullius
    • Erbium
    • Note: Rare and refractory metals
  • Powder metal
    • Vanadium
    • Tungsten
    • Cobalt
    • Molybdenum
    • Nickel
    • Tantalum
    • Titanium powder
  • Bronze rental
    • Bronze
  • Bronze rental (DIN, EN)
    • Bronze BrAZhN11-6-6.
    • Bronze BrOTsS3-12-5
    • Tin bronze
    • C90700, 2.1050, CuSn10
    • 2.1052, CuSn12
    • C91700, 2.1060, CuSn12Ni
    • C92700, 2.1061, CuSn12Pb
    • C93200, 2.1090, CuSn7ZnPb
    • C90500, CuSn10Zn
    • Lead bronze
    • C93700, 2.1177, CuSn10Pb10
    • C93800, 2.1183 - CuSn7Pb15
    • C94100, CuSn5Pb20
    • Aluminum bronze
    • C61000, 2.0921, CuAl8
    • С61400, 2.0932, CuAl8Fe3
    • C95200, 2.0940, CuAl10Fe
    • C95500, 2.0970, CuAl9Ni3fe2
    • C95300, CuAl9
    • C62300-CuAl10Fe3
    • C62400-CuAl11Fe3
    • Nickel aluminum bronze
    • c63000, 2.0966, CuAl10Ni5Fe4
    • c95500, 2.0975, CuAI10Fe5Ni5
    • C95800, 2.0975, CuAl10Ni
    • C95520, CuAl11Ni
    • 2.0872, CuNi10Fe1Mn, Cw352h
    • Silicon aluminum bronze
    • CW301G, C64200
    • Siliceous bronze
    • C65500, CuAl11Fe3
    • C65620, CuSi3Fe2Zn3
    • C65100, CuSi1.5
    • Tin-lead bronze
    • c92200, CuSn6Zn4Pb2
  • Copper rental
    • Beryllium copper lead
    • Chromium Copper
    • Beryllium copper
    • Tellurium Copper C14500
    • C18150 Copper Chromium Zirconium
    • Pipe copper
    • Copper wire
    • Circle copper
    • Bus
    • Sheet
    • Copper hexagon
    • Fitting
    • Solder copper
    • Casting copper
  • Brass rolled products (GOST)
    • Pipe brass
    • Wire
    • Round
    • Tape
    • Sheet
    • Hexagon
    • Casting brass
    • LS59-1, CuZn40Pb2
    • L60, CuZn40
    • L63, C27200
    • L68, CuZn33
    • L70, SuZn30
    • L80, SuZn20
    • L90, SuZn10, C52400
    • L96, 2.0220, CuZn5
    • Lo62-1, 2.0530, c46400
    • Lo70-1, CuZn28Sn1As, c44300
    • Lo90-1, C41000
    • Lts40s, CuZn37AI1, C85800
    • LMC58-2, 2.0572, CuZn40Mn2
    • LZHMC59-1-1
    • LAZH60-1-1
    • LК80-3
  • Brass rental (DIN, EN)
    • Lead-free brass and low-alloy copper
    • Brass
    • Brass hire. Buy, price, sale, delivery.
    • C21000, 2.0220, CuZn5
    • C22000, 2.0230, CuZn10
    • C23000, 2.0240, CuZn15
    • C24000, 2.0250, CuZn20
    • C26000, 2.0265, CuZn30
    • 2.0280, CuZn33, C26800
    • 2.0321, CuZn37
    • C28000, 2.0360, CuZn40
    • 2.0490, CuZn31Si1
    • Admiralty brass, naval brass
    • CuZn28Sn1, C44300
    • CuZn39Sn1, c46400
    • Lead brass
    • C37000, 2.0371, CuZn38Pb1,5
    • C36000, 2.0375, CuZn36Pb3
    • C37700, 2.0380, CuZn39Pb2
    • C38500, 2.0401, CuZn39Pb3
    • C38010, 2.0402, CuZn40Pb2
    • C35330, CuZn36Pb2As, cw602n
    • Aluminum brass
    • CuZn37Mn3Al2PbSi, CuZn40Al2, 2.0550
    • C68700, CuZn20Al2
    • C86300, CuZn19Al6
    • Red brass
    • C84400, CuSn2ZnPb
    • C83600, CuSn5ZnPb
  • Babbitt, solder, tin
    • Babbit tin
    • Lead babbit
    • Tin solder
    • Lead solder
    • Antimony solders POSSu
    • Bismuth solders
    • Silver solders PRS
    • Solder POTS 10, POTS 80
    • Solder hts
  • Aluminum rolled products
    • Pipe
    • Wire
    • Round
    • Tape
    • Sheet
    • Corner
    • Channel
    • Taurus aluminum
    • Aluminum profile
    • Aluminum rail
    • Aluminum hexagon
    • Aluminium brazing
  • Aluminum rolled products (GOST)
    • Avial
    • AD31, AlMg0,7Si, 6063
    • Ad33, 6061, AlMg1SiCu
    • The spaciousness alloy
    • Amg2, 5251, AlMg2
    • Amg3, 5754, AlMg3
    • AMg5, 5056, AlMg5
    • AMg6, AlMg6
    • Rolled aluminum
    • V95, 7075, AlZnMgCu1.5
    • AK4, 2618
    • AK4-1, 2018, AlCu2Mg1.5Ni
    • AK6, 2117, AlCuMg0.5
    • Ak8, 2014, AlCu4SiMg
    • Akcm
    • AM4
    • Vak4
    • VD1, 1105
    • Sva5
  • Aluminum rolled products (EN)
    • Alloy 1050
    • Alloy 1100
    • 2014, 3.1255, AlCu4SiMg
    • 2219, AlCu6Mn
    • AlMn1Cu, 3003, 3.0517
    • AlMg2,5 , 5052, 3.3523
    • AlMg4.5Mn0.7, 5083, 3.3547
    • AlMg1SiCu, 6061, 3.3214
    • AlMg0.7Si, 6063, 3.3206
    • AlSi1MgMn, 6082, 3.2315
    • AlZn4.5Mg1.5M, 7005
    • AlZn6CuMgZr, 7050, 3.4144
    • AlZn5.5MgCu, 7075, 3.4365
    • Automotive aluminum alloys
    • Aluminum alloys with rare metals
  • Duralumin
    • Pipe
    • Wire
    • Round
    • Tape
    • Sheet
    • Square
    • Corner
    • Hexagon
    • Profile
    • Duralumin rental (GOST)
    • D1, 2017
    • D12, 3004
    • D16, 2024
    • D16T
    • D18, 2117
    • Duralumin rental (DIN, EN)
    • AlCuMg1, 3.1325
    • AlCuMg2, 3.1355
  • Non-ferrous metals rolled
    • Tin foil, tape
    • Lead sheet
    • Zinc wire
  • Boiler and spring steel
    • Spring and spring steel
    • 50HFA, 50CrV4, 50HF
    • 51HFA, 51CrV4, 1.8159
    • 55S2A, 55Si7, 1.5026
    • 60G, c60e, 1.1221
    • 60S2, 60si7, 60s2
    • 60S2A, 60mnsicr4, 1.2826
    • 60S2HA, 54sicr6, 1.7103
    • 65, c67s, 1.1231
    • 65G, ck67, 65g
    • 65S2VA, 65Si7, 1.5028
    • Boiler steel
    • 12H1MF, 14MoV6-3, 13HMF
    • 13HFA
    • 15H1M1F, 15crmov5-9, 1.8521
    • 15HM, 13CrMo4-5, 15hm
    • 18H11MNFB, X22CrMoV12-1
    • 20K, p265gh, st41k
    • 30H3MF, 31CrMoV9
    • Heat-resistant steel
    • 30HM, 25CrMo4, 1.7218
    • 25H1MF, 21CrMoV5-7
    • 25H2М1F, 24CrMoV5-5
    • 35HM, 34CrMo4
  • Structural steel
    • Bearing steel
    • SHH15, 100Cr6, aisi 52100
    • Nitricast structural steel
    • 38H2MYUA, 34CrAlMo5, 38hmj
    • 40H, 41cr4, 40h
    • Hardening of structural steel
    • 12HN2, 15CrNi6, 15hn
    • 12HN3A, 14nicr14, 12hn3a
    • 15H, 15Cr3, aisi 5115
    • 18HG, 16MnCr5
    • 18HGT, 20mncr5
    • 18H2N4VA, 18CrNiMo7-6
    • 18H2N4MA, x19nicrmo4
    • 20H, 20Cr4
    • 20HGNM, 20NiCrMo2-2, aisi 8620
    • 20H2N4A, 20cr2ni4a
    • Low alloy structural steel
    • 09G2S, 13mn6, 09g2s
    • 14G2, 17mn4, p295gh
    • 16GS, 15ga
    • 16G2AF, p460n, s420n
    • 17G1S, s355j2g3
    • 17G1S-U, St52-3, s355j0
    • 35G2, 35s20
    • 45G2, 45g2, aisi 1144
    • Alloy structural steel
    • 10g2, 10G2, aisi 1513
    • 12H2N4A,15NiCr13, 1.5752
    • AS14, 11SMnPb30
    • 20G, 20mn5
    • 20HN3A, aisi 4320, 20hn3a
    • 20HM, 24CrMo5, 20hm
    • 25HGM, 20CrMo5, 1.7264
    • 30H, aisi 5130, 30h
    • 30HGS, 30hgs
    • 30HGSA, 30hgsa
    • 30HGSN2A, 30hgsna
    • 30HN2MA, 30CrNiMo8
    • 30HN3A, 31nicr14
    • 34HN3MA, 36NiCrMo16, 35NiCrMo16
    • 35HGS, 35hgs
    • 35HGSA, 35hgsa
    • AS35G2, 36smnpb14, 1.0765
    • 38H2N2MA, 34CrNiMo6, 40NiCrMo7
    • 40HN2MA, 34CrNiMo4, 36hnm
    • 38HS, 37hs
    • 38HA, 37Cr4, aisi 5135
    • 38HN3MFA, 35nicrmov12-5
    • 40g, 40Mn4, aisi 1035
    • 38HM, 42CrMo4, 1.7225 aisi
    • 40HN, 36NiCr6, aisi 3135
    • 40HFA, 1.7223, aisi 4142
    • 45H, 45h, 1.7035
    • 45HN2MFA, k2425, 45hnmf
    • A40G, 44smn28, 1.0762, 46s20
  • Tool steel
    • Alloy tool steel
    • 5HNV, 56NiCrMoV7, 1.2714
    • 5HV2SF, 1.2542, nz2
    • 9HF, 80CrV2, ncv1
    • 11HF, 115CrV3, 1.2210
    • HVG, 105WCr6, 1.2419
    • HGS, 100CrMn6, ncms
    • Roller tool steel
    • Steel H, 102Cr6, 1.2067, Stal 52100
    • Die steel
    • 3H3M3F, 32CrMoV12-28, 1.2365
    • 3H2V8F, X30WCrV9-3, 1.2581
    • 4H5MFS, X37CrMoV5-1, 1.2343
    • 4H5MF1S, X40CrMoV5-1, 1.2344
    • 5HGM, 40CrMnMo7, 1.2311, aisi P20
    • 5HNM, 54NiCrMoV6,1.2711
    • 6HS, 60MnSi4, 6hs
    • 9HVG, 100MnCrW4
    • H6VF, X100CrMoV5-1, 1.2363
    • H12, X210Cr12, 1.2080
    • H12M, X165CrMoV12, 1.2601
    • H12MF, K110, D2 Stal
    • H12F1, X155CrVMo12-1, Nc11Lv
    • High speed
    • R6M5, 1.3343, hs6-5-2, sw7m
    • R6M5K5, 1.3243, hs6-5-2-5
    • R6M5F3, 1.3344, hs6-5-3
    • R9M4K8,1.3207
    • R12F3, move lower 1.3318, sw12
    • R18, 1.3355, hs18-0-1, sw18
    • Carbon steel
    • U10,1.1645, C105W1
    • 11G12, 110G13L, X120Mn12
  • Steel pipe
    • Oil pipe
    • Seamless steel pipe
    • Water and gas supply tube
  • Compensators
    • Bellows
    • Flange compensator
    • Sleeve axis tilt
    • Lens compensators
    • Axial compensator
    • Fabric expansion
    • For heating systems
  • Netting made of non-ferrous metals
    • Stainless steel woven wire mesh
    • Nichrome woven wire mesh
    • Bronze woven mesh
    • Brass woven wire mesh
    • Copper woven mesh
    • Molybdenum woven wire mesh
    • Tungsten woven mesh
    • Titanium woven wire mesh
    • Tantalum woven mesh
    • Nickel woven wire mesh
    • Magnesium mesh woven
    • Zirconium woven wire mesh
    • Inconel® fabric mesh
    • Hastelloy® woven mesh
    • Monel® woven mesh
    • Woven mesh
  • Metal hose
    • Weld
    • The cone angle 74°
    • Sphere under a cone with an angle of 60°
    • Flange connection
    • Flanged with hinged bolts
    • Nipple with external thread
    • Table durability
  • Filter elements mesh
    • Filtering
    • Application area
  • Ropes and cables
    • Stainless ropes
View entire catalog