Shinhokoku Steel Corporation

LIVE – METALISM

PRODUCTS

HOME > Product Range > Low CTE

LOW THERMAL EXPANSION ALLOY(CASTING & FORGING)

In the common sense metal expand when heated however, we are able to offer metal which has no thermal expansion.
We have developed various low and zero thermal expansion alloy (invariable alloy) which applicable various kinds of application.
Followings are our series of low thermal expansion alloys (Invariable alloy) however, we are also able to make customized invar according to customer’s requirement which have additional special characteristics.

Characteristic

IC-ZX The ultimate zero expansion material surpassing Super Invar
Coefficient of thermal expansion 0 ppm/K
Lower temperature limit 253 K
Applications ・・・
Semiconductor production equipments, FPD manufacturing equipments, Inspection tools for precision measurement
IC-DX The highest grade Invar ∙ Covers everything: ZERO thermal expansion, performance stability down to cryogenic temp., high rigidity and corrosion resistance
Coefficient of thermal expansion 0 ppm/K
Lower temperature limit 4 K
Young’s modulus 176 GPa
Corrosion resistance equivalent to SUS304
Applications ・・・
Next-generation observation instruments for ultra-large telescope, Radio telescopes, Gravity wave observation devices
IC-LTX Zero expansion invar usable at 173K
Coefficient of thermal expansion 0 ppm/K
Lower temperature limit 173 K
Applications ・・・
Astronomical observation satellites, Infrared telescopes
IC-36FS Free-cutting super invar
Coefficient of thermal expansion 1 ppm/K (below 1/10 of iron)
The most abundant material in our brand invar alloys, which makes it possible to sell small lots and to deliver with a short lead time.
Applications ・・・
Semiconductor production equipments, FPD manufacturing equipments, Optical lens parts
IC-36 Standard invar
Coefficient of thermal expansion 1.5 ppm/K
Lower temperature limit 73 K
Applications ・・・
Precision press machines, Optical communication devices
IC-362A Rust resistant invar equivalent to SUS410
Coefficient of thermal expansion 2 ppm/K
High rust resistance in neutral environment
Applications ・・・
Polishing machines for aspherical lens, Semiconductor production equipments
IC-364 Invar with adjusted coefficient of thermal expansion according to customer requirements
Coefficient of thermal expansion 4 ppm/K
Applications・・・Parts for bonding with glass
SLE-2 Corrosion resistant invar equivalent to SUS304
Cofficient of thermal expansion 5 ppm/K
Applications・・・Parts for bonding with ceramics
SLE-20A Corrosion resistant invar equivalent to SUS410
Coefficient of thermal expansion 3 ppm/K
Applications ・・・Wafer polishing surface plates, Medical precision equipments
VIC-65 Invar for high temperature use
Invar alloy with coefficient of thermal expansion of 5ppm/K from room temperature to 623 K
Applications・・・CFRP molds for aircraft, Hard glass sealing materials
Grade Physical properties Mechanical properties
CTE Young&s modulus Thermal conductivity Specific heat 0.2% Yield strength Tensile strength Elongation Hardness
ppm/K GPa W/m℃ J/kg℃ MPa MPa % HRB
Zero expansion invar IC-ZX 0
(298~323K)
137 15 500 326 450 36 75
High rigidity zero expansion invar for cryogenic temp. IC-DX 0
(291~301K)
176 15 490 212 575 57 76
Zero expansion invar for low temp. IC-LTX 0
(291~301K)
133 14 485 277 449 38 71
Super invar IC-36FS 0.7
(298~373K)
136 14 450 308 463 38 76
Invar IC-36 1.5
(298~373K)
140 15 500 230 400 40 79
IC-362A 2.0
(298~373K)
141 15 470 364 477 36 75
IC-364 4.0
(298~373K)
151 14 480 224 439 46 60
Stainless invar SLE-2 5.0
(298~373K)
179 14 470 221 507 48 63
SLE-20A 3.0
(298~373K)
160 14 490 216 484 43 65
Invar for high temp. use VIC-65 4.7
(298~623K)
132 20 490 347 518 37 78

★Forged alloy only

(note) The property values are representative values obtained by actual measurements.

Reference

Type CTE Young’s modulus Thermal conductivity Specific heat 02%Y Yield strength Tensile strength Elongation Hardness
ppm/K
25~100℃
GPa W/m℃ J/kg℃ MPa MPa % HRB
Ductile invar 3.5 114 16 480 269 453 30 76
Ferritic stainless (SUS410) 10.0 205 24 460 541 759 28 99
Austenitic stainless (SUS) 17.3 173 16 500 296 626 60 91
Spheroidal graphite cast iron (FCD450) 12.4 178 37 480 754 3 90
Carbon steel 12.2 207 55 490 637 666 17 99

PRODUCT RANGE

Product Range

Accumulated R&D effort and crystallization of refined technology.

ACCESS

Access

Headquarters
Headquarters : 5-13-1 Arajuku-machi, Kawagoe, Saitama, Japan,
Tel +81-49-242-1950
MAP
Mie plant
835-1 Takamatsu,Kawagoe-cho, Mie-gun, Mie, Japan
Tel +81-59-363-2313
MAP

For our product information For metal and alloy information please kindly contact to us.