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Super Invar 32-5

Global Super Invar 32-5 Supplier

Super Invar 32-5 is a magnetic, austenitic, solid solution alloy with a low coefficient of thermal expansion (CTE). The CTE of Super Invar is around one third the CTE of regular Invar and is almost zero after specific heat processing.

Super Invar is Available in many forms we can offer a bespoke solution that meets your exact requirements and specification for your 32-5 application, be it from Plate, Bar, Sheet,

With over 20 years’ experience, our team has a combined wealth of knowledge about Super Invar and its different characteristics, so we can guarantee you will find the product that fits your requirements.

For pricing or general advice speak to CSM today on +44 (0) 1268 774 261, email or alternatively complete the contact form below. 

Super Invar 32-5 Stockist Range

Product Form Range From Range To

Super Invar Plate

2.7mm 50mm

Super Invar Bar

19.05mm 90mm

Super Invar Sheet

1mm 3mm

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    Markets & Applications

    • Optical instruments
    • Telescopes
    • Laser instruments and equipment
    • Ring laser gyroscopes
    • Laser benches
    • Positioning devices
    • Metrology devices
    • Scientific instruments
    • Structural components and supports for optical and laser systems
    • Applications that require lower expansivity than Invar

    Super Invar 32-5 Composition

    Mechanical Properties

    Metallurgic Condition Hot Rolled
    Yield Strength MPa 276
    Tensile Strength MPa 483
    Hardness HB 132
    Elongation 40

    Technical Specifications

    ASTM UNS Werkstoff AMS
    F1684 (CHEM ONLY) K93500 1-23011


    Nickel (Nominal) Ni 32.0
    Cobalt (Nominal) Co 5.0
    Iron Fe Bal
    Manganese Mn 0.05
    Silicon Si 0.08
    Copper Cu 0.08
    Aluminium Al 0.07
    Carbon C 0.5
    Chromium Cr 0.25
    Sulphur S 0.015

    Physical Properties

    30-100°C μm/m°C 0.84
    30-150°C 1.17
    30-200°C 1.72
    30-250°C 2.53
    30-300°C 4.16
    30-350°C 5.0
    30-400°C 7.05
    30-500°C 8.99
    30-600°C 10.56
    30-700°C 11.56
    30-800°C 12.21
    30-900°C 12.96
    Density g/cm³ 8.15
    Curie Temp °C (°F) 245 (470)
    Melting Point °C (°F) 1427 (2600)
    Youngs / Shears Modulus GPa 59
    Modulus of Elasticity at 20°C GPa 145
    Specific Heat at 20 °C 0.12 Cal/g-°C
    Therman Conductivity at 20°C W/cm°C 0.10
    Thermal Expansion 25°C to 450°C ppm/°C 8.0
    Electrical Resistivity mΩ-cm 82
    Poisson's Coefficient 0.23

    Our Service

    We are a global speciality metals stockist with an extensive stock range, we are able to provide specialist alloys and materials to a huge variety of industries. Some of the markets we trade with include: automotive, aerospace, medical, defence, electronic & many other high tech industries where a high level of quality and precision is required.

    We offer a bespoke service to cater to every one of our clients. As a team, we continually strive to give our clients a cost-effective complete solution and, with our extensive knowledge, we are able to give as much technical advice and information as possible.

    Why not Skip to our contact form below, fill in some details and also tell us about your Super Invar 32-5 Material Requirements. Click here to skip down the page.

    We offer a bespoke service so, if you don’t see the size or form that you require, contact us either by phone, email or our contact form below, and we will provide a solution to your requirements.

    About Super Invar

    Super Invar®, also known as Invar 32-5 and Alloy 32-5 is an austenitic, solid solution alloy that belongs to the low expansion alloys family.

    The low coefficient of thermal expansion (CTE) is the most important characteristic of all invar types and especially of Super Invar®. The CTE of Super Invar® is around one third of the CTE of regular invar and is almost zero after specific heat processing.

    Super Invar 32-5 was designed to provide minimum thermal expansion at room temperatures (one half that of Invar Alloy). This alloy also exhibits austenite stability to a service temperature of at least -67°F and thermal expansion properties besting Invar alloys when used in the 67/203°F (-55/95°C) temperature range. The minimal expansion of Super Invar over this range of temperatures, makes this alloy useful in many applications including structural components and substrates in instrument systems requiring precision measurements.