Invar Fe-Ni36 4J36 Low Expansion Iron Nickel Alloy 1.2 ppm°C Anti
Corrosion
4J36 is a special low-expansion iron-nickel alloy with an ultra-low
expansion coefficient. Among them, the control of carbon and
manganese components is very important. Cold deformation can reduce
the coefficient of thermal expansion, and heat treatment in a
specific temperature range can stabilize the coefficient of thermal
expansion. 4J36 is resistant to corrosion in dry air at room
temperature. In other harsh environments, such as humid air,
corrosion (rusting) may occur.
4J36 can be welded by all welding processes, including tungsten
electrode welding, metal arc welding, plasma welding, argon arc
welding, manual arc welding, etc. Pulsed arc welding is recommended
as the priority.
4J36 is used in environments requiring extremely low expansion
coefficients.
4J36 Typical applications:
● Production, storage and transportation of liquefied gas
● Measurement and control instruments with operating temperature
below + 200 ℃, such as temperature adjustment devices
● Helix connector bushing between metal and other materials
● Bimetallic and temperature controlled bimetallic
● membrane frame
● Shadow mask
● Tempering molds for CRP parts in the aviation industry
● Frame of artificial satellite and missile electronic control unit
below -200 ℃
● Auxiliary electron tube in electromagnetic lens of laser control
device
4J36 Chemical Composition:
| Grade | C | Si | Mn | P | S | Ni | Fe | Cr | Co |
| 4J36 | ≤0.03 | ≤0.01 | 0.3-0.6 | ≤0.02 | ≤0.01 | 35-37 | Balance | ≤0. 2 | ≤0. 5 |
4J36 Physical Properties:
| Density | 8.1g/cm3 |
| Curie Temp | 230℃ |
| Melting Point | 1430℃ |
| Specific Heat | 515J/Kg |
| Yield Rp0.2 | ≥274 MPa |
| Tensile Rm | ≥957 MPa |
| Elongation | >40% |
| Hardness | >422HBW |
| Temperature Coefficient(20-100℃) | 1.2 × 10–6 K–1(1.2 ppm°C) |
4J36 Similar Brand:
Fe-Ni36,W. Nr.1.3912,Ni36,Vacodil 36,Nilo 36 ,X1NiCrMoCu,N 25-20-7,
4J36,UNSK93600,UNSK93601
