4J36 is a special low-expansion iron-nickel alloy with an extremely low coefficient of expansion.The control of carbon and manganese components in 4J36 is very important.Cold deformation can reduce the thermal expansion coefficient, and heat treatment within a specific temperature range can stabilize the thermal expansion coefficient.4J36 foil is resistant to corrosion at room temperature in dry air.Corrosion (rust) may occur in other harsh environments such as humid air.

what is the 4j36 foil？

4J36 has the following features：

● Very low coefficient of thermal expansion between -250°C and +200°C

● good plasticity and toughness

4J36 application area

4J36 is used in environments that require extremely low expansion coefficients.

Typical applications are as follows:

● Production, storage and transportation of liquefied gas

● Measuring and controlling instruments with operating temperatures below +200°C, eg temperature regulating devices

● Screw connector bushing between metal and other materials

● Bimetal and temperature controlled double metal

●Film frame

● shadow mask

● CRP parts tempering mold for aviation industry

● Satellite and missile electronic control unit framework below -200°C

● Auxiliary tube in electromagnetic lens of laser control device

4J36 Similar grades

Fe-Ni36 (France), W. Nr.1.3912, Ni36 (Germany), X1NiCrMoCu, N 25-20-7 (UK) 4J36, UNSK93600 Thermostat Alloy, UNSK93601 Pressure Vessel Plate (USA)

4J36 Physical Properties

4J36 density

Density: ρ=8.1g/cm3

4J36 melting temperature range

Melting temperature range: 1430°C

4J36 Curie temperature

Curie temperature: 230 °C

4J36 specific heat

Specific heat: 515J/Kg

4J36 welding

4J36 can use all welding processes for welding, including tungsten electrode welding, metal arc welding, plasma welding, argon arc welding, manual arc welding and so on. First consider pulsed arc welding.

Prior to welding, the material should be in an annealed state, clean, free of oil, scratches, markings, etc.

Low heat input must be used and the temperature between layers should be less than 120°C.

No pre-weld and post-weld heat treatment is required.

If the performance of the weld is designed to be the same as that of the base metal, an electrode of the same material as the base material must be used. Or choose

Choose the following

GTAW/GMAW Nicrofer S 7020 W.-Nr.2.4806

SG-NiCr20Nb

AWS A 5.14 ERNiCr-3

SMAW W.-Nr.2.4648

EL-NiCr19Nb

AWS A 5.11 EniCrFe-3

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