Expansion Alloy Invar36-4J36 Sheet/Bar/Strip/Tube

Product Detail

Common Trade Names: Invar alloy,4J36,Invar,UNS k93600 (FeNi36),Nilo36,Pernifer 36, Invar Steel,36H/36H-BИ、Unipsan 36

 It is a  Nickel-Iron, low expansion alloy containing 36% Nickel with balance of Iron. It maintains nearly constant dimensions over the range of normal atmospheric temperatures and has a low coefficient of expansion from cryogenic temperatures to about +500°C. Nilo 36 also retains good strength and toughness at cryogenic temperatures. Applications include standards of length, thermostat rods, laser components and tanks and piping for the storage and transportation of liquefied gasses.

Relative Grade:

Grade Russia U.S.A. France Germany U.K.
4J32 32НКД
Super Nilvar
- -
4J36 36Н
Invar Standard
4J38 - 38NiFM
- - - 
Invar 36 Chemical Composition
C Ni Si Mn P S Fe
≤0.05 35.0-37.0 ≤0.3 0.2-0.6 ≤0.02 ≤0.02 balance
Invar 36 Physical Properties
Density(g/cm3) Meltingtemperature(℃) Specific heat capacity/J/(kg•℃)(20~100℃) Electricalresistivity(μΩ·m) Thermalconductivity/W/(m•℃) Curie point(℃)
8.10 1430-1450 515 0.78 11  230
Invar 36 Typical Mechanical Properties
condition σb/MPa σ0.2/MPa δ/%
annealing 450 274 35

Invar 36 thermal expansion coefficient at different temperatures

Alloy designation Average thermal expansion coefficient/(10-6/ ℃)
20-50℃ 20-100℃ 20-200℃ 20-300℃ 20-400℃ 20-500℃
4J36 0.6 0.8 2.0 5.1 8.0 10.0

Invar 36 Available Products in Sekonic Metals

Inconel 718 bar,inconel 625 bar

Invar 36 Bars & Rods

Round bars/Flat bars/Hex bars,     Size From 8.0mm-320mm, Used for bolts,fastners and other spare parts

welding wire and spring wire

Invar wire

Supply in welding wire and spring wire in coil form and cut length.

Sheet & Plate

Invar 36 sheet & plate

Widths up to 1500mm and lengths up to 6000mm,Thickness from 0.1mm  to 100mm.

Invar seamless tube & Caplliary Tube

Standards size and  customized dimension can be produced by us with small tolerance

inconel strip,invar stirp,kovar stirp

Invar 36 strip & coil

Soft condition and hard condition with AB bright surface, width up to 1000mm

Shadow mask

Invar 36 Shadow Mask

Can be produced according to clients drawing or smaples with precision tolerance.

Why Inconel Invar 36 ?

1) Very low thermal expansion coefficient between - 250 ℃ ~ + 200 ℃.

2) Very good plasticity and toughness

 Invar 36 Application field:

● Liquefied petroleum gas production, storage and transportation

● Screw connector bushing between metal and other materials

● Double metal and temperature control of double metal

● Film type framework

● Shadow mask

● Aviation industry CRP parts drawing die

● Framework of satellite and missile electronic control unit below 200 ℃

● The laser control electromagnetic lens in the auxiliary vacuum tube

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