Strip Wire Bar Form Low Expansion Alloy 4J36 Curie Temperature 230°C

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 instruments like optoelectronic devices, optical and laser benches, electronics, and other kinds of scientific instruments.

Chemical compositions

Smelting process

Usually used with non-vacuum induction furnace, vacuum induction furnace or arc furnace smelting

Equal Grades

Invar36, NILO 36, Pernifer36

Thermal treatment

Test samples specified in the standard are processed and heat treated according to the following process: heat semi-finished samples to 840 °C ± 10 °C, for 1 hour, water quenching, then processed into finished samples, heat preservation for 1 hour at 315 °C ± 10 °C for 1 hour, furnace cold or air cold.

Line expansion coefficient:

Standard:α1(20-100°C)≤1.5x10-6/°C

Physical performances

Density:8.1g/cm3

Resresistivity:0.78μΩ·m

Curie Temperature: 230°C

Character

Low expansions

Readily weldable

Corrosion resistance in the atmosphere, fresh water and sea water

Good hot and cold processing performance

Good abrasive performance

Application

Cathode Ray Tubes

Telecommunications

Aeronautical and aerospace engineering

Cryogenic engineering (liquefied natural gas tankers)

Forms of available

Wire, bar, forging, strip, plate, pipe, tube, capillary