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Read MoreSuper Invar 32-5 Supplier and Stockist in India
Largest Super invar 32-5 Stockist in Mumbai, India. Supplier of Super invar 32-5 Sheets, Super Invar 32-5 Round Bars Stockist, Super invar 32-5 Plates Distributor. Reliable Aerospace Grade Super Invar 32-5 Supplier & Exporter.
Super Invar 32-5 is a nickel-iron-cobalt alloy specifically engineered for ultra-low thermal expansion, maintaining dimensional stability across a wide temperature range. With approximately 32% nickel and small cobalt additions, this alloy provides superior resistance to thermal distortion, making it ideal for precision aerospace and defense applications. Super Invar 32-5 is commonly used in satellite components, optical instruments, cryogenic systems, and other critical devices where even minor thermal expansion can compromise performance.
Super Invar 32-5 Stockist
At Bhansali AeroAlloys, we supply high-quality Super Invar 32-5 round bars, sheets, plates, and custom forms tailored to meet the rigorous demands of aerospace and defense industries. Our focus on precision manufacturing, stringent quality control, and reliable delivery ensures materials that perform flawlessly in mission-critical applications. For technical support, custom solutions, or pricing inquiries, reach out to our expert team today at sales@bhansaliaeroalloys.com and partner with a trusted supplier of specialty low-expansion alloys.
Typical Analysis
| Element | Typical Analysis (%) |
|---|---|
| Carbon | 0.05 |
| Nickel | 31.75 |
| Iron | Balance |
| Silicon | 0.09 |
| Manganese | 0.39 |
| Cobalt | 5.36 |
| Sulfur | 0.01 |
| Chromium | 0.03 |
| Aluminum | 0.07 |
| Copper | 0.08 |
Characteristics
Super Invar 32-5 is a magnetic, austenitic alloy of iron, nickel, and cobalt, engineered for extremely low thermal expansion at room temperature. It retains austenitic stability down to -67°F (-55°C) and provides lower thermal expansion than Invar 36 (36% nickel-iron) across the range of -67 to 203°F (-55 to 95°C).
Applications
Super Invar 32-5 is widely utilized in aerospace and defense for structural components requiring extreme dimensional stability, such as precision supports, optical mounts, and laser system substrates. Its ultra-low thermal expansion makes it ideal for guidance systems, avionics, and satellite assemblies. The alloy is also used in waveguide tubes and components that integrate with low-expansion glass or quartz, ensuring reliability in mission-critical environments.
Physical Properties
| Property | Value |
|---|---|
| Specific gravity | 8.15 |
| Density (lb/cu in) | 0.294 |
| Density (kg/m³) | 8150 |
| Electrical resistivity (RT, microhm-cm) | 80 |
| Mean coefficient of thermal expansion (10⁻⁶/°F, -67 to 203 °F) | 0.35 |
| Mean coefficient of thermal expansion (10⁻⁶/°C, -55 to 95 °C) | 0.63 |
| Modulus of elasticity (x 10⁶ psi) | 21 |
| Modulus of elasticity (x 10⁶ MPa) | 144 |
| MS Temperature (°F) | -112 |
| MS Temperature (°C) | -80 |
| Poisson's ratio | 0.23 |
Heat Treatment
Fabrication methods such as machining, forming, and deep drawing can introduce stresses in this alloy, potentially affecting its thermal expansion behavior.
To minimize these effects, parts should be heat treated at or as close to their finished size as possible.
Annealing
Heat the alloy to 1450°F (788°C) and hold for 30 minutes per inch of thickness, then air cool.
Heating above 1000°F (538°C) relieves stresses caused by cold work.
In general, higher annealing temperatures result in lower hardness levels.
Heat Treating for Lowest Thermal Expansion and Optimum Stability
For the lowest thermal expansion and maximum stability, heat the alloy to 1550°F (843°C) for 1 hour, followed by water quenching.
Next, stress relieve at 600°F (316°C) for 1 hour and air cool.
Finally, age at 200°F (93°C) for 24 hours and air cool again.
Since this alloy oxidizes quickly at temperatures above 1000°F (538°C), it is recommended to perform heat treatment in a protective environment such as vacuum, hydrogen, dissociated ammonia, or inert gases.
Thermal Conductivity
Forging
The recommended forging temperature for Super Invar 32-5 is 2000–2150°F (1093–1177°C). Heat the alloy rapidly and avoid prolonged soaking in the furnace, as extended exposure can lead to surface checking caused by oxygen and sulfur contamination.
Grinding
For grinding operations, use a soft silicon carbide wheel that wears without loading. For finishing, start with a wheel roughness of No. 80 grit.
Machinability
Super Invar 32-5 exhibits machinability similar to Type 316 austenitic stainless steel but at a lower efficiency, rated at approximately 25% of AISI B1112. The alloy produces gummy, stringy chips, which can make machining challenging. Using work-hardened bars can improve results.
Standard tool geometries for austenitic stainless steels are effective. Tools should be sharp, well-finished, and rigidly supported. Recommended cutting fluids include:
- A 1:1 blend of sulfachlorinated petroleum oil (with 8–10% fatty oil) and paraffin blending oil
- Water-emulsifiable cutting fluid with polar and extreme pressure additives
Parts must be degreased and cleaned immediately after machining to eliminate sulfur residues that may cause grain boundary embrittlement.
When using carbide tools, surface speeds can be 2–3 times higher than with high-speed steel, and feeds can be increased by 50–100%.
For best results, machining parameters should be adjusted gradually. Optimize speeds and feeds based on the workpiece to balance production efficiency and tool life.
Typical Mechanical Properties
| 0.2% Yield Strength | Ultimate Tensile Strength | % Elongation in 2" | Hardness Rockwell B | |||
|---|---|---|---|---|---|---|
| ksi | MPa | ksi | MPa | Annealed | Cold Worked | |
| 40 | 276 | 70 | 483 | 40 | 75 | 90 |
Global Export Destinations for Our Super Invar 32-5
We export Super Invar 32-5 to countries across the globe, including Afghanistan, Albania, Andorra, Austria, Bahrain, Bangladesh, Bhutan, Brunei, Belarus, Belgium, Bulgaria, Cambodia, China, Cyprus, Croatia, Czech Republic, Denmark, Estonia, Egypt, Finland, France, Germany, Greece, Georgia, Hungary, Iceland, Ireland, Italy, Indonesia, Iran, Iraq, Israel, Japan, Jordan, Kazakhstan, Kuwait, Kyrgyzstan, Lebanon, Latvia, Latin America, Liechtenstein, Lithuania, Luxembourg, Malta, Moldova, Monaco, Malaysia, Maldives, Mongolia, Myanmar (Burma), Nepal, North Korea, Netherlands, Norway, Oman, Poland, Portugal, Pakistan, Palestine, Philippines, Qatar, Russia, Romania, Russia, San Marino, Serbia and Montenegro, Slovakia, Slovenia, Spain, Sweden, Switzerland, Saudi Arabia, Singapore, South Korea, South Africa, Sri Lanka, Syria, Taiwan, Tanzania, Tajikistan, Thailand, Turkey, Turkmenistan, United States, Ukraine, United Kingdom, United Arab Emirates (UAE), Uzbekistan, Vietnam, Yemen
Domestic Cities Where We Supply Super Invar 32-5
We supply Super Invar 32-5 to cities including Mumbai, Delhi, Kolkata, Chennai, Bengaluru, Hyderabad, Ahmedabad, Pune, Surat, Jaipur, Kanpur, Lucknow, Nagpur, Ghaziabad, Indore, Coimbatore, Kochi, Patna, Kozhikode, Bhopal, Thrissur, Vadodara, Agra, Malappuram, Thiruvananthapuram, Kannur, Ludhiana, Nashik, Vijayawada, Madurai, Varanasi, Meerut, Faridabad, Rajkot, Jamshedpur, Srinagar, Jabalpur, Asansol, Vasai-Virar City, Allahabad, Dhanbad, Aurangabad, Amritsar, Jodhpur, Ranchi, Raipur, Kollam, Gwalior, Durg-Bhilainagar, Chandigarh, and Tiruchirappalli.
