Expansion Alloys Rods, Bars, Sheets, Plates, Strips, Foils, Wires
Expansion Alloy Rod, Bar, Sheet, Plate, Strip, Foil, Wire
Kovar Alloy
Kovar alloy, ASTM F15, Nilo-K,UNS K94610(FeNi29Co17),Chinese 4J29
Kovar Alloy, is a controlled expansion alloy. It is a Nickel Iron alloy with 29% Nickel, 17% Cobalt and the remaining balance is Iron.
Forms: Sheet/Plate, Bar/Rod/Wire/Coil,Capillary/Pipe/Tube
DESCRIPTION
Kovar Alloy is a vacuum melted, iron-nickel-cobalt, low expansion alloy whose chemical composition is controlled
within narrow limits to assure precise uniform thermal expansion properties. Extensive quality controls are employed
in the manufacture of this alloy to ensure uniform physical and mechanical properties for ease in deep drawing,
coining, stamping and machining.
APPLICATION
Kovar alloy has been used for making hermetic seals with the harder Pyrex glasses and ceramic materials.
This alloy has found wide use in application where high reliability is a necessity. In power tubes, microwave tubes,
transistors, diodes, inter-grated circuits and has been used for the flat pack and the dual-in-line package.
Cross Reference
Russia USA UK Japan France Germany
29HK Kovar Nilo K -
Dilver P0 Vacon 12
29HK-?? Rodar Teachallony Glass 29-17 Teleaseal -
Dilver P1 Silvar
Invar Alloy
Invar alloy,ASTM F1684,UNS k93600(FeNi36),Chinese 4J36
A Nickel-Iron, low expansion alloy containing 36% Nickel. It maintains nearly constant dimensions over the range
of normal atmospheric temperatures.
Forms: Sheet/Plate, Bar/Rod/Wire/Coil,Capillary/Pipe/Tube
DESCRIPTION
Invar (also know as Invar 36, NILO 36, Pernifer 36, and Invar Steel) is a low expansion alloy consisting of 36% Nickel, balance Iron.
Invar Alloy exhibits extremely low expansion around ambient temperatures, making Invar Alloy particularly useful in applications
where minimum thermal expansion and high dimensional stability is required, such as in precision instruments like optoelectronic
devices, optical and laser benches, electronics, and other kinds of scientific instruments.
APPLICATION
This alloy has been used for applications where dimensional changes due to temperature variation must be minimized such as in
radio and electronic devices, aircraft controls, optical and laser system, etc.
Cross Reference
Russia USA Japan France Germany U.K.
36H Invar Cactus LE Invar Standard Vacodil36 Invar
Nilvar Nilo36
36H-?? Unipsan36 Fe-Ni36 Nilos36 36Ni
Super Invar
Super Invar ,A low expansion alloy consisting of 32% Nickel, 4% Cobalt, and balance Iron. Super Invar Alloy exhibits
minimum thermal expansion at room temperatures (one half of Invar Alloy), as well as thermal expansion properties
less than that of Invar Alloy in the 67/203°F (-55/95°C) temperature range.
Forms: Sheet/Plate, Bar/Rod/Wire/Coil,Capillary/Pipe/Tube
DESCRIPTION
Super Invar ,A low expansion alloy consisting of 32% Nickel, 4% Cobalt, and balance Iron. Super Invar Alloy exhibits
minimum thermal expansion at room temperatures (one half of Invar Alloy), as well as thermal expansion properties
less than that of Invar Alloy in the 67/203°F (-55/95°C) temperature range. The minimal expansion of Super Invar over
this range of temperatures, makes this alloy useful in many applications including structural components and
substrates in instrument systems requiring precision measurements.
APPLICATION
Optical instruments . Telescopes . Laser instruments and equipment . Ring laser gyroscopes . Laser benches .
Positioning devices . Metrology devices . Structural components . Substrates in instrument systems requiring
precision measurements, and other applications that require lower expansivity than Invar Alloy provides.
Cross Reference
Russia USA Japan France
32H?? Super-invar SI Invar
32H?-B? Super-Nilvar Superieur
Ceramvar Alloy
Ceramvar alloy, ASTM F1466,(Ni27Co25),Chinese 4J33/4J34
CERAMVAR ALLOY or we call iron-nickel-cobalt alloys, nominally 27% nickel, 25% cobalt and 48% iron, in the
forms of wire, rod, bar, strip, sheet, and tubing, intended primarily for brazed metal-to-ceramic seals with
alumina ceramics, for vacuum electronic applications. Unless otherwise indicated.
Forms: Sheet/Plate, Bar/Rod/Wire/Coil,Capillary/Pipe/Tube
DESCRIPTION
CERAMVAR ALLOY or we call iron-nickel-cobalt alloys, nominally 27% nickel, 25% cobalt and 48% iron, in the forms of
wire, rod, bar, strip, sheet, and tubing, intended primarily for brazed metal-to-ceramic seals with alumina ceramics,
for vacuum electronic applications. Unless otherwise indicated. When tested, the alloys shall comply to specified
requirements for chemical composition, surface finish, temper, grain size, tensile strength, hardness, inclusion content,
thermal expansion, transformation, and dimensions.
APPLICATION
Glass to metal ,vacuum electronic , metal-to-ceramic seals.
Cross Reference:
Russia Japan
33HK(Ni33Co17) -
70HB
Non-magnetic constant expansion ceramic-sealing alloy. 70HB applies to gyroscope and vacuum electronic devices in the
non-magnetic ceramic sealing material.
DESCRIPTION
70HB has medium line thermal expansion coefficient at room temperature to 600 ? range.No magnetic, corrosion resistant,
at the same time with high strength and toughness.
APPLICATION
Apply to gyroscope and vacuum electronic devices in the non-magnetic ceramic sealing material.
Alloy 42
Alloy 42,ASTM F30,UNS k94100,(Fe-42Ni) ,Chinese 4J42
42 Alloy, a low expansion alloy, is very similar to Invar 36 with a slightly different Coefficient of Thermal Expansion.
This nickel-iron alloy is ideal forlid, lead frames, stencil/etching, telecommunications and aircraft industry,
offering a more affordable alternative to Kovar when a tight seal is not required.
Forms: Sheet/Plate, Bar/Rod/Wire/Coil,Capillary/Pipe/Tube
DESCRIPTION
42 Alloy, a low expansion alloy, is very similar to Invar 36 with a slightly different Coefficient of Thermal Expansion.
This nickel-iron alloy is ideal forlid, lead frames, stencil/etching, telecommunications and aircraft industry,
offering a more affordable alternative to Kovar when a tight seal is not required. 42 Alloy has a virtually constant low rate
of thermal expansion at temperatures up to approximately 650°F (343°C). Easily machined and formed hot or cold,
42 Alloy is also used extensively in the medical, electronics and automotive industries.
APPLICATION
Glass to metal seals for a wide variety of electronic tubes, hermetic packages, and automotive and industrial lamps.
Cross reference:
Russia U.S.A UK Japan France Germany
42H Glass Sealing 42 Uniseal 42 Nilo42 YEF42 NSD N42 Vacogil42 Nilo42
Alloy 46
Alloy 46,UNS K94600,(Fe-46Ni),Chinese 4J46
Consisting of 46% nickel and iron balance, 46 Alloy is a controlled expansion alloy used mostly in electronic applications,
especially for glass and ceramic seals. Alloy 46 is also known as Premier 462, NILO 464, and Glass-Seal 461.
Forms: Sheet/Plate, Bar/Rod/Wire/Coil,Capillary/Pipe/Tube
DESCRIPTION
Consisting of 46% nickel and iron balance, 46 Alloy is a controlled expansion alloy used mostly in electronic applications,
especially for glass and ceramic seals. Alloy 46 is also known as Premier 462, NILO 464, and Glass-Seal 461.
APPLICATION
Glass to metal seals for electronic tubes and hermetic devices.
Cross Reference:
Russia USA France
46 Fe-Ni alloy46 N46
48 Alloy
48 ALLOY is A controlled expansion alloy, consisting of 48% Nickel, balance Iron; used in a variety of electronic application,
especially for glass and ceramic seals.
Forms: Sheet/Plate, Bar/Rod/Wire/Coil,Capillary/Pipe/Tube
DESCRIPTION
48 ALLOY is A controlled expansion alloy, consisting of 48% Nickel, balance Iron; used in a variety of electronic application,
especially for glass and ceramic seals.
APPLICATION
Glass to metal seals for variety of electronic tubes and hermetic devices.
Cross Reference:
Russia USA UK France ISO
H47X Fe-Ni alloy 48 N48 N485/N48 FeNi48
52 Alloy
Alloy 52,ASTM F30,UNS K95050,(Fe-50Ni),Chinese 4J50
Alloy 52 is a 52% nickel-iron alloy developed for glass-to-metal seals for some of the soft glasses and some ceramics.
Produced with good machining properties, it’s manufactured in a controlled environment under controlled conditions.
Forms: Sheet/Plate, Bar/Rod/Wire/Coil,Capillary/Pipe/Tube
DESCRIPTION
Alloy 52 is a 52% nickel-iron alloy developed for glass-to-metal seals for some of the soft glasses and some ceramics.
Produced with good machining properties, it’s manufactured in a controlled environment under controlled conditions.
APPLICATION
Glass to metal seals for electronic tubes, automotive and industrial lamps, and specialty hermetic devices.
Cross Reference:
Russia USA UK Japan France Germany
50H FeNi50 Nilo51 NS-1 N50 Vacovit500
54K9X Alloy
CROSS REFERENCE
CN Russia UK France Germany
Co54Cr9 54K9X Darwin410 ADR(Ni39-Fe) Nilo40
Alloy 27
DESCRIPTION
Alloy 27, it’s glass-to-metal sealing and iron-chromium alloy. Nominally 28 % chromium, in strip, bar, wire, and rod forms
intended primarily for sealing to glass in electronic applications. UNS K92801 should only be considered for use at service
temperatures below 300°C. The alloy is prone to sigma phase formation at temperatures close to 620°C, and exhibits brittle
mechanical behavior after prolonged exposures at temperatures close to 475°C.
Alloy 426
Sealmet HC-4, alloy 426, ASTM F31, UNS k94760, (Fe-42Ni-6Cr), Chinese 4J6
A controlled expansion alloy, consisting of 42% Nickel, 6% Chromium, balance Iron; used in a wide variety of electronic
applications, especially for glass seals.
Forms: Sheet/Plate, Bar/Rod/Wire/Coil,Capillary/Pipe/Tube
DESCRIPTION
A nickel-chromium-iron which has been developed to match the thermal expansion characteristics of 0120 glass.
An additional advantage of this alloy for glass-to-metals seals is the tight dark green oxide coating formed by
wet hydrogen annealing at 1900/2200°F (1038/1204°C) for one hour. The oxide tends to flux with the glass and
make it a vacuum tight seal if the surfaces are clean. To obtain the necessary surface cleanliness, pickle in muriatic acid.
APPLICATION
Glass to metal seals for a variety of electronic tubes and CRT tubes. It is supplied in wire form for compression seals.
Cross Reference:
Russia USA Japan France Germany
H42 X 6 42Ni-6Cr Carpenter426 Sylvania4 Sealmet4 NRS-1 YEF-426 SNC ASV(426) Ni42Cr6 Vacovit426 (NiCr426
Inspection & Approval Certificates : C/W Certificate (Calibration Works Certificate) EN 10204 3.1 / DIN 50049 3.1 / ISO 10474 3.1 Mill Test Certificate,
NACE HIC TM-0284 / NACE MR-0103 / NACE MR-0175 / ISO 15166, BS EN 9001, BS EN 9100, AS 9100D, IATF 16949, NADCAP Certified, CE Marked,
European Pressure Equipment Directive PED-2014/68/EU, AD-2000-WO, ASME Boiler & Pressure Vessel Code Section-II Part A Edition 2019,
API 6A (American Petroleum Institute), with 3.2 Certificate duly Certified & Approved by IBR (Indian Boiler Regulations), LR Class (Lloyd’s Register),
GL (Germanischer Lloyd), BV (Bureau Veritas), DNV (Det Norske Veritas), ABS Class (American Bureau of Shipping), SGS, TUV, RINA,
IR Class (Indian Register of Shipping), NORSOK Approved Standard M-630, M-650 Rev.3 For Ministry of Defence, DRDO, Indian Ordnance Factory,
Heavy Vehicle Factory, Bharat Electronics Limited (BEL), Hindustan Aeronautics Limited (HAL), Mishra Dhatu Nigam Limited (MIDHANI),
Bharat Dynamics Limited (BDL), Indian Navy (Naval Dockyard), Mazagon Dock Shipbuilders Limited (MDL), Bharat Heavy Electricals Limited (BHEL),
National Thermal Power Corporation Limited (NTPC), Aerospace, Aviation, Electric Vehicles, Armour Vehicle, Armor Vehicle, Automotive, Automobile,
Railways, Medical Equipments, Military Missiles, Energy, Power Sector, Electronics, Power Generation
If you have any requirement of above items, please feel free to contact us
Regards,
CONTACT PERSON :
MUKESH SHAH
Director
Mobile No. 0091 – 9820292499
Email – marketing@rolexmetals.com
ROLEX METAL DISTRIBUTORS
57-A Khatargalli
Thakurdwar
Mumbai – 400 002 India
0091-22-23858802
0091-22-23823963
0091-22-23898724
marketing@rolexmetals.com
www.rolexmetals.com
CHAIRMAN – chairman@rolexmetals.com
MANAGING DIRECTOR – managingdirector@rolexmetals.com
TECHNICAL DIRECTOR – technicaldirector@rolexmetals.com
SALES DIRECTOR – salesdirector@rolexmetals.com
COMMERCIAL DIRECTOR – commercialdirector@rolexmetals.com
COMMERCIAL MANAGER – commercial@rolexmetals.com
GENERAL MANAGER – generalmanager@rolexmetals.com
SALES MANAGER – salesmanager@rolexmetals.com
PURCHASE MANAGER – purchasemanager@rolexmetals.com
TECHNICAL MANAGER – technical@rolexmetals.com
WORKS MANAGER – worksmanager@rolexmetals.com
STORES MANAGER – stores@rolexmetals.com
WAREHOUSE MANAGER – warehouse@rolexmetals.com
SALES DOMESTIC – salesdomestic@rolexmetals.com
SALES INTERNATIONAL – salesinternational@rolexmetals.com
SALES GENERAL – sales@rolexmetals.com
PURCHASE GENERAL – purchase@rolexmetals.com
FINANCE MANAGER – finance@rolexmetals.com
ACCOUNTS MANAGER – accounts@rolexmetals.com
GENERAL INFORMATION – info@rolexmetals.com
EXPORT MANAGER – export@rolexmetals.com
IMPORT MANAGER – import@rolexmetals.com
AIR EXPORT – airexport@rolexmetals.com
SEA EXPORT – seaexport@rolexmetals.com
CUSTOMS – customs@rolexmetals.com
AIR FREIGHT – airfreight@rolexmetals.com
SEA FREIGHT – seafreight@rolexmetals.com
DESPATCH – despatch@rolexmetals.com
INSPECTION – inspection@rolexmetals.com
LOGISTICS – logistics@rolexmetals.com
TRANSPORT – transport@rolexmetals.com
KALAMBOLI WAREHOUSE – kalamboli@rolexmetals.com
TALOJA WAREHOUSE – taloja@rolexmetals.com
KHOPOLI WAREHOUSE – khopoli@rolexmetals.com
NHAVA SHEVA WAREHOUSE – nhavasheva@rolexmetals.com
KANDLA WAREHOUSE – kandla@rolexmetals.com
MUMBAI WAREHOUSE – mumbai@rolexmetals.com
STOCKYARD – stockyard@rolexmetals.com
SERVICE – service@rolexmetals.com
SUPPORT – support@rolexmetals.com
RECRUITMENT – career@rolexmetals.com
WEBMASTER – webmaster@rolexmetals.com
CUSTOMER CARE – customercare@rolexmetals.com
