CNC Machining in Invar

Invar provides exceptional dimensional stability, maintaining consistent size and shape even when temperatures fluctuate.

Advantages of Invar

Invar is a nickel-iron alloy celebrated for its minimal thermal expansion properties. Invar is used in precision instruments, optical systems, and aerospace engineering.

Key Features

Low Coefficient of Thermal Expansion (CTE)

Precision Machinability

Thermal Stability

High Corrosion Resistance

Available Invar Specifications

The following table shows common invar alloys. If you have any other alloy requirements, please contact us.

Invar 36

Tensile Strength

Elongation at Break

Hardness

Density

65,000 PSI

35%

Rockwell B70

0.291 lb/in³
(8.05 g/cm³)

Invar 32-5

Tensile Strength

Elongation at Break

Hardness

Density

70,000 PSI

40%

Rockwell B75

0.294 lb/in³
(8.14 g/cm³)

Invar Surface Finishes

The following table shows common surface finishes for invar.

Bead Blast

Black Oxide

Heat Treat

Electroless Nickel Plating

Polishing

Gold Plating

Silver Plating

Powder Coating

Brushing

Invar FAQs

How difficult is machining Invar?

Machining Invar is relatively challenging because it's a relatively hard material. Proper tool selection and precise parameter settings are key to successful machining.
What are the advantages of machining Invar?

Due to its low thermal expansion and stability, Invar is highly suitable for applications requiring high precision machining. It maintains dimensional stability over temperature changes, making it an ideal choice for manufacturing precision instruments and high-precision parts.
What is Invar alloy?

Invar is an alloy containing iron (Fe) and nickel (Ni), typically consisting of around 36% nickel and 64% iron. It's renowned for its low thermal expansion and is widely used in applications requiring dimensional stability, such as precision instruments and measuring devices.