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.
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.
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.
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 info@cityspecialmetals.com or alternatively complete the contact form below.
Our Products
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, and Sheet.
| Product Form | Range From | Range To | |
|---|---|---|---|
 | Super Invar Plate | 2.7mm | 50mm |
 | Super Invar Round Bar | 19.05mm | 90mm |
 | Super Invar Sheet | 1mm | 3mm |
Super Invar 32-5 Enquiry Form
Applications
- Optical Instruments
- Telescopes
- Laser Instruments & Equipment
- Ring laser gyroscopes
- Laser benches
- Positioning devices
- Metrology devices
- Scientific instruments
- Structural components & supports for optical and laser systems
- Applications that require lower expansivity than Invar
Markets
- Aerospace
- Medical
- Electronics
- Automotive
- Defence
Super Invar 32-5 Chemistry
| Mechanical Properties | ||
|---|---|---|
| Metallurgical Condition | Annealed, Descaled | |
| Yield Strength | KSI (MPa) | 276 |
| Tensile Strength | KSI (MPa) | 483 |
| Hardness | HB | 132 |
| Elongation | 50mm | 40 |
| Co Efficient of Thermal Expansion | ||
|---|---|---|
| 30-300°C | 10-6/°C | 5 |
| 30-400°C | 10-6/°C | 7.6 |
| Density | g/cm³ | 8.15 |
| Curie Temp | °F (°C) | 245 (470) |
| Melting Point | °F (°C) | 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 |
| Thermal Conductivity at 20°C | W/cm°C | 0.10 |
| Thermal Conductivity at 25°C to 450°C | ppm/°C | 8.0 |
| Electrical Resistivity | mΩ-cm | 82 |
| Poisson’s coefficient | 0.23 |
| Technical Specifications | |||
|---|---|---|---|
| ASTM | UNS | Werkstoff | AMS |
| F1684 (CHEM ONLY) | K93500 | I-23011 |
| Chemistry | ||
|---|---|---|
| Nickel (Nominal) | Ni | 32 |
| Cobalt (Nominal | Co | 5.0 |
| Iron | Fe | Balance |
| Manganese | Mn | 0.05 |
| Silicon | Si | 0.08 |
| Copper | Cu | 0.08 |
| Aluminium | Al | 0.07 |
| Carbon | C | 0.04 |
| Chromium | Cr | 0.25 |
| Sulphur | S | 0.015 |
Speak to us
We can distribute metals across the globe, including locations in Europe, The Middle East, The Far East and the Americas.
Phone Us
+44 1268 774 261
Speak to the Sales Team
sales@cityspecialmetals.com
Ask Us A Question
info@cityspecialmetals.com
More about Super Invar 32-5
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.
City Special Metals
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.
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