Controlled Expansion Alloys

NILO K Controlled Expansion Alloy UNS K94610 W. Nr. 1.3981 Round Bar in Stock NILO alloy K (UNS K94610/W. Nr. 1.3981), a nickel-iron-cobalt alloy containing approximately 29% nickel and 17% cobalt. Its thermal expansion characteristics match those of borosilicate glasses and alumina type ceramics. It is manufactured to a close chemistry range, yielding repeatable properties which make it eminently suitable for glass-to-metal seals in mass production applications, or where

4J50 Iron Nickel Controlled Expansion Alloy for Glass and Ceramics Sealing 4J50 is used in 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. Specification YB/T 5235-1993 Sealed Iron-Nickel-Chromium, Iron-Nickel Alloys Technical Requirements Chemical composition Element C Mn Si P S Al Co Ni Fe Weight(%) 0.05 max 0.80 max 0.30 max 0.020 max 0

NILO alloy 48 for Glass-to-metal Seals in Soft Lead or Soda Lime Type Glasses NILO alloy 48 is a binary nickel-iron alloy containing 48% nickel. Its main use is for glass-to-metal seals in soft lead or soda lime type glasses. It is also used for thermostats in industrial applications up to 450°C (840°F). Chemical composition Element Ni Cr Mn Si C Al P S Fe Weight % 48 0.25 max 0.80 max 0.30 max 0.05 max 0.10 max 0.025 max 0.025 max Rem Characters Coefficient of thermal

Alloy 52 Controlled Expansion Alloy for Soft Glasses and Ceramics Sealing Alloy 52 was developed for glass-to-metal seals for some of the soft glasses and ceramics. The alloy’s rate of thermal expansion is virtually constant to a temperature of about 1050°F (565°C). Key features Near zero coefficient of linear thermal expansion High strength and toughness at cryogenic temperatures Applications Magnetic reed switches Glass to metal seals that need controlled linear expansion

4J34 Porcelain Sealed Controlled Expansion Alloy per YB/T 5234-1993 4J34 is a ceramic sealing alloy developed in combination with the characteristics of China's ceramics. 4J33 ceramic sealing alloy is mainly used for matching sealing with ceramics. It is an important sealing structure material in electric vacuum industry. 4J34 alloy has a linear expansion coefficient similar to that of 95%Al2O3 ceramics in the temperature range of -60~600 C. Curie temperature: 470 degrees C

4J33 Porcelain Sealed Controlled Expansion Alloy per YB/T 5234-1993 4J33 is a ceramic sealing alloy developed in combination with the characteristics of China's ceramics. 4J33 ceramic sealing alloy is mainly used for matching sealing with ceramics. It is an important sealing structure material in electric vacuum industry. 4J33 alloy has a linear expansion coefficient similar to that of 95%Al2O3 ceramics in the temperature range of -60~600 C. Curie temperature: 440 degrees C

4J32 Super-Invar Low Expansion Alloy -60~80°C lower expansion rate than 4J36 4J32 is also called Super-Invar. It has a lower expansion coefficient than 4J36 within temperature range -60~80°C. It is mainly used to make instrument parts which requires high presicion in enviornment temperature range. Chemical composition Element C P S Si Mn Cu Co Ni Fe Weight(%) 0.05 max 0.02 max 0.02 max 0.02 max 0.20~0.60 0.40~0.80 3.2~4.2 31.5~33.0 Rem Spec YB/T 5241-2005 Alloy with expansion

Kovar Controlled Expansion Alloy Iron-nickel-cobalt Alloy for Hard Glass Sealing Kovar is one of the most popular of the controlled expansion alloys for hermetic sealing applications. And it is one of A-ONE ALLOY's featured products. We stocks Kovar sheet, Kovar plate, Kovar rod, Kovar strip, Kovar wire, Kovar round bar as well as ingot. We make fast delivery to meet customer requirements. And we also delivery Kovar in form of pipe, tube, capillary and part per customer spec

Nilo 42 Controlled Expansion Sealing Alloy W.Nr 1.3917 ASTM F30 UNS K94100 NILO 42, also known as UNS K94100/W. Nr. 1.3917, is a binary FeNi alloy containing 42% nickel. It has a low and nominally constant, coefficient of expansion in the range of 20-300°C (85-570°F). Chemical composition Element Ni Mn Si C Cr P S Al Fe Weight(%) 41.5~42.5 0.80 max 0.30 max 0.05 max 0.25 max 0.025 max 0.025 max 0.10 max Remainder Applications: Tooling for aerospace composites Thermostat rods

N52 is an iron-nickel controlled expansion alloy suitable to soft glass sealing, with optimal chemical composition to obtain hermetic seals. Typical applications are hermetic feedtroughs, reed relays. Equal grades: ASTM F30 UNS N14052 DIN 17745 W 2.4478 A54-301 Alloy 52 4J50 N52 Chemical composition Element Ni Mn Si C Cr Co P S Al Fe Wt, % 50.0-51.0 0.60 max. 0.30 max. 0.05 max. 0.25 max. - 0.025 max. 0.025 max. 0.10 max. Rem Applications Precision impedance diaphragm

ASTM F31 UNS K94760 Glass Sealing Alloy Cold Rolled Strip ALLOY 42-6 K94760 is a typical glass sealing alloy, the coefficient of expansion is similar to the soft glass in the temperature range of 20~400℃. The alloy contains 6% chromium, and after oxidation treatment the alloy surface produces a very dense oxide membrane that is strongly bound to the substrate and well infiltrated with the soft glass, so that can get high strength sealing surface. The alloy K94760 contains 42%

Low Expansion Alloy 4J36 Strip Wire Bar Curie Temperature 230°C 4J36 is well known as Invar36 worldwide. It is a Low Expansion Alloy with Curie point of around 230°C.Invar alloy (Invar 36) 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

N14052 Alloy 52 sealing to glass in electronic applications Alloy 52 is also known as N52 alloy. It is a FeNi alloy for glass-to-metal seals for some of the soft glasses and ceramics. It is intended primarily for sealing to glass in electronic applications but may be used for sealing to ceramics as well. Chemical composition Element Ni Mn Si C Cr P S Al Fe wt, % 50.5 0.60 0.30 0.05 0.25 0.025 0.025 0.1 Rem The nickel contents listed are nominal. The nickel contents of the