When aerospace instruments and precision industrial equipment require minimal dimensional changes despite temperature fluctuations, Invar Sheets become indispensable. Renowned for their uniquely low coefficient of thermal expansion, these sheets from Aurico Alloys LLP ensure reliable performance in chemical, marine, pharma, power generation, and oil & gas sectors.
Table of Contents:
Invar 36 (UNS K93603, ASTM F1684) is a nickel-iron alloy with about 36% nickel content, delivering near-zero expansion from cryogenic temperatures up to about 260°C (500°F). This dimensional stability alongside excellent strength and toughness makes Invar sheets favored in applications ranging from precision instruments and aerospace components to cryogenics and scientific equipment.
Aurico Alloys LLP supplies high-quality Invar sheets in customizable thicknesses and dimensions, hot or cold rolled, annealed, or polished with full documentation including EN 10204 certifications and strict traceability. This ensures our clients in specialized sectors access reliable material for critical applications demanding performance without compromise.
Besides dimensional reliability, Invar sheets offer good machinability, weldability, and resistance to fatigue and corrosion in various environments, making them a preferred solution for stable tooling, bimetallic thermostats, metrology devices, and microwave systems.
High-quality Invar Sheets ready for industrial use.
Specification Overview
| Supplier & Manufacturer | Aurico Alloys LLP |
|---|---|
| Grade | Invar 36 |
| Standards | One plate, sheet and strip specification, in the identity table below. VDM also lists DIN 17745 and SEW 385 for sheet and plate. Inspection certificates to EN 10204. |
| Thickness Range | 0.2 mm – 4.75 mm |
| Width | 10 mm – 2500 mm |
| Length | Customizable to project requirements |
| Finish | Hot rolled, cold rolled, polished, annealed |
| Delivery | Supplied from stock or arranged against order, depending on grade and size; availability and lead time confirmed at quotation. Complete mill test reports (MTC), batch traceability, export packaging. |
Equivalent Grades & Standards
| Property | Value |
|---|---|
| UNS number | K93600 / K93601 / K93602 / K93603 |
| Werkstoff / EN number | 1.3912 |
| EN designation | Ni36 |
| Density | 8.1 g/cm3 |
| Melting range | 1430 °C |
| Specific heat capacity (20 °C) | 486 J/kg·K |
| Thermal conductivity (20 °C) | 12.8 W/m·K |
| Electrical resistivity (20 °C) | 78 µΩ·cm |
| Modulus of elasticity (20 °C) | 143 GPa |
| Curie temperature | 230 °C |
| Plate, sheet and strip specification | ASTM F1684 / B753 / B603 |
Identifiers and physical constants for Invar 36. A dash means no such designation is published for this grade.
Stock & Product Availability
Aurico Alloys LLP stocks Invar sheets ready for immediate delivery worldwide with certified quality and tailored cut lengths to meet urgent industrial demands in aerospace, scientific instrumentation, cryogenics, and precision manufacturing.
Chemical Composition
| Element | Min (%) | Max (%) |
|---|---|---|
| Nickel (Ni) | 35 | 37 |
| Chromium (Cr) | — | 0.25 |
| Iron (Fe) | — | Balance |
| Cobalt (Co) | — | 0.5 |
| Manganese (Mn) | — | 0.6 |
| Silicon (Si) | — | 0.4 |
| Carbon (C) | — | 0.05 |
| Sulfur (S) | — | 0.015 |
| Phosphorus (P) | — | 0.015 |
Composition limits for Invar 36. These are specification limits for the grade, not measured values for a lot; the mill test certificate supplied with your order states the actual analysis.
Mechanical & Physical Properties
| Property | Typical Value |
|---|---|
| Tensile Strength (MPa) | 320 – 450 |
| Yield Strength (MPa) | 180 – 290 |
| Elongation (%) | 25 – 40 |
| Thermal Expansion (µm/m°C) | 1.2 (20-100°C) |
Applications & Benefits
- Precision instruments and metrology devices requiring dimensional stability
- Aerospace structures, satellite components, and optical systems
- Electrical components like transformers and magnetic shielding
- Cryogenic equipment that demands consistent physical tolerances
- Scientific & medical instrument housings and temperature regulators
FAQ & Insights
Global Export Destinations
We ship worldwide from Mumbai. See every destination we export to on our export markets page.
Domestic Supply Network Across India
We deliver across India from our Mumbai stockyard. See every city we supply on our supply locations page.
Conclusion
Invar Sheets from Aurico Alloys LLP guarantee unmatched dimensional stability and certified mechanical properties for demanding chemical, marine, pharma, and power industry applications. Are your mission-critical projects prepared with this premium alloy solution?