UNISPAN LR35 offers the lowest coefficient of thermal expansion of any alloy now available. It is a low residual modification of UNISPAN 36 for fully achieving the demanding operational level of precision equipment. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and surface treatment. Filing Code: Fe-46. Producer or source: Cyclops Corporation.

INCOLOY alloy 909 is a high-strength alloy having a constant low coefficient of thermal expansion and an essentially constant rigidity up to 1200 F. The alloy is highly resistant to thermal fatigue and thermal shock. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Fe-81. Producer or source: Inco Alloys International Inc..

INCOLOY alloy 907 is a high-strength alloy having a low coefficient of thermal expansion. It is a precipitation hardening alloy. INCOLOY alloy 907 is useful for gas-turbine components where it provides for closer control of clearances and tolerances. This datasheet provides information on composition, physical properties, elasticity, tensile properties, and shear strength. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Fe-83. Producer or source: Inco Alloys International Inc..

CARPENTER SUPER INVAR 32-5 is a magnetic, austenitic solid solution alloy designed to minimize thermal expansion at room temperature. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on forming, heat treating, and machining. Filing Code: FE-100. Producer or source: Carpenter.

TECHALLOY GLASSEAL 29-17 is an iron-nickel-cobalt alloy with a thermal expansion rate that is unlike most metals and closely matches the thermal expansion characteristics of borosilicate glass, PYREX glass, and other similar low-expansion materials. It assures precisely controlled expansion properties that are ideal for usage in glass-to-metal seals. Typical applications are transmitting tubes, relays and electronic power tube envelopes. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Fe-60. Producer or source: Techalloy Company Inc..

TECHALLOY 36 Alloy is an iron-nickel alloy that has a thermal expansion rate about 10% of the rate for carbon steel up to 400 F. It provides the lowest thermal expansion rate of all similar types of alloys. It has fairly good room-temperature mechanical properties in the annealed condition: a tensile strength of 71,000 psi and an elongation of 41%; also, it is tough at cryogenic temperatures. Among its many applications are electronic components, cryogenic parts and aircraft controls. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Fe-58. Producer or source: Techalloy Company Inc..

Copper/Invar/Copper is a wrought metallic composite material used in printed circuit boards, power planes, metal cores, hybrid enclosures, heat sinks, and other applications where coefficients of thermal expansion (CTE) match or where constraint of thermal expansion is required or beneficial. The laminated Cu/Invar/Cu composite material is metallurgically bonded by roll bonding and normally used in the fully annealed condition. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, and joining. Filing Code: FE-125. Producer or source: Engineered Materials Solutions Inc.

PYROMET CTX-3 is a high-strength precipitation-hardenable low-expansion superalloy. It exhibits a low coefficient of thermal expansion over a broad temperature range combined with high strength. The alloy possesses high hot hardness and good resistance to thermal fatigue. It is brazable, weldable and can be plated with chromium. CTX-3 uses comprise compressor and exhaust casings, seals and other components for gas turbine engines. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Fe-78. Producer or source: Carpenter.

VDM 36 (Pernifer 36) is a binary iron-nickel alloy with a particularly low coefficient of linear thermal expansion. This alloy is used for applications where dimensional changes due to temperature variation must be minimized or in conjunction with high expansion alloys in applications where a motion is desired when the temperature changes. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-775. Producer or source: VDM Metals GmbH.

UNISEAL 52 is a nickel-iron alloy produced for glass-to-metal seals with higher-than-normal thermal expansion glasses such as Types O120 and 9010. It is used in hermetically-sealed magnetic dry reed switches, compression seals, and ceramic seals where expansion is required to be almost linear to 1000 F. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on forming, heat treating, machining, joining, and surface treatment. Filing Code: Ni-156. Producer or source: Cyclops Corporation.

TECHALLOY GLASSEAL 52 is a nickel-iron alloy produced for glass-to-metal seals with higher than normal thermal-expansion glasses such as Types 0120 and 9010, and certain ceramics. It has relatively good mechanical properties: a tensile strength of 80,000 psi and an elongation of 35%. It is used in a number of applications where expansion is required to be almost linear to 1000 F. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on forming, heat treating, machining, joining, and surface treatment. Filing Code: Ni-260. Producer or source: Techalloy Company Inc..

TECHALLOY GLASSEAL 42 is an iron-nickel alloy with thermal expansion that closely matches the 1075 glass. Also, it is sometimes used for sealing action for the 0120 and 0010 glasses. It has the lowest expansivity of the iron-nickel alloys that are commonly used for glass-sealing applications. It is made under strict metallurgical control to provide uniformity of performance. Among its uses are sealed-beam automobile headlamps, ceramic-to-glass seals and industrial lamps. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Fe-59. Producer or source: Techalloy Company Inc..

The 50 Nickel-Iron Alloy is recommended for glass-to-metal seals. It is used with such glasses as Types 0120 and 9010 that have higher than normal thermal expansion and with certain ceramics. It is used in a number of applications where expansion must be almost linear to 1000 F. The 50 Nickel-Iron Alloy has relatively good mechanical properties; in fact, at room temperature it has a tensile strength of 80,000 psi and an elongation of 35%. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on forming, heat treating, machining, joining, and surface treatment. Filing Code: Ni-276. Producer or source: Mills that produce iron-nickel alloys.

The 42 Nickel-Iron alloy has the lowest expansivity of the Iron-Nickel alloys that are commonly used for glass-sealing applications. Its thermal expansion closely matches the 1075 glass and it is sometimes used for sealing action with the 0120 and 0010 glasses. It is made close metallurgical control to provide uniformity of performance. Its many uses include industrial lamps, ceramic-to-glass seals, and sealed-beam automobile headlamps. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Fe-66. Producer or source: Iron-nickel alloy mills.

Carpenter Low Expansion 39 alloy is a 39% nickel iron alloy with a low rate of thermal expansion useful to temperature ranges up to 316 deg C (600 deg F). This datasheet provides information on composition, physical properties, and tensile properties. It also includes information on joining. Filing Code: FE-132. Producer or source: Carpenter Technology Corporation.

Carpenter Low Expansion 49 alloy is a 48% nickel-iron alloy with a low rate of thermal expansion useful for glass sealing of fiber optics. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on heat treating and joining. Filing Code: FE-133. Producer or source: Carpenter Technology Corporation.

Carpenter Low-Expansion 45 alloy is a 45% nickel-iron alloy with a constant rate of thermal expansion useful in thermostats. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on high temperature performance as well as heat treating and joining. Filing Code: FE-134. Producer or source: Carpenter.

Avesta Sheffield SAF 2304 is an austenitic/ferritic duplex stainless steel with high tensile strength, impact toughness with good workability and weldability. The alloy has high resistance to chloride stress-corrosion cracking and good resistance to pitting, crevice, and general corrosion. It has higher thermal conductivity and a lower coefficient of thermal expansion than austenitic stainless steel. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as fracture toughness. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, and joining. Filing Code: SS-649. Producer or source: Avesta Sheffield Inc.

Avesta Sheffield SAF 2507 is an austenitic/ferritic duplex stainless steel with very high strength. The alloy has a lower coefficient of thermal expansion and a higher thermal conductivity than austenitic stainless steels. The alloy has a high resistance to pitting, crevice, and general corrosion; it has a very high resistance to chloride stress-corrosion cracking. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, and joining. Filing Code: SS-652. Producer or source: Avesta Sheffield Inc.

Pyromet CTX-1 is a high-strength, precipitation-hardenable superalloy exhibiting a low coefficient of thermal expansion and high strength up to about 1200 deg F. The alloy possesses high hot hardness and good thermal fatigue resistance. Its applications include components for gas turbine engines, hot-work die applications and high-pressure hydrogen environments. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: FE-56. Producer or source: Carpenter. Originally published February 1976, revised May 1997.