Invar36/FeNi36 Premium 4J36 Invar Strip Low Thermal Expansion Alloy Band for Precision Instrument Manufacturing
Price:
Bargain
MOQ:
100kg
Delivery Time:
15 workdays
Brand:
HUONA
Product Description
Invar36/FeNi36 Premium 4J36 Invar Strip
Low Thermal Expansion Alloy Band for Precision Instrument Manufacturing
4J36 Low Expansion Invar Alloy Strip DIN17745 FeNi36 0.4 X 211mm
Material: FeNi
Chemical: Fe64% Ni36%
Density: 8.1g/cm³
Surface: Bright & smooth
Product Overview
HUONA-Alloy-4J36 (Expansion alloy), commonly known as Invar, FeNi36, Invar Standard, or Vacodil36, is a nickel-iron alloy renowned for its exceptionally low coefficient of thermal expansion (CTE). The name "Invar" derives from "invariable," reflecting its minimal expansion or contraction with temperature changes.
Invented in 1896 by Swiss physicist Charles Édouard Guillaume, who received the Nobel Prize in Physics in 1920 for this discovery, Invar has enabled significant advancements in scientific instruments and precision engineering.
Applications
HUONA-Alloy-4J36 (Invar) is utilized in applications requiring high dimensional stability, including:
- Precision instruments and clocks
- Seismic creep gauges
- Television shadow-mask frames
- Valves in motors
- Antimagnetic watches
- High-precision leveling rods in land surveying
- Piston struts to limit thermal expansion in cylinders
Chemical Composition
| Element | Content (%) | Element | Content (%) |
|---|---|---|---|
| Ni | 35~37.0 | Mn | 0.2~0.6 |
| Fe | Balance | C | ≤0.05 |
| Si | ≤0.3 | P | ≤0.02 |
| S | ≤0.02 |
Physical Properties
| Property | Value |
|---|---|
| Density (g/cm³) | 8.1 |
| Electrical resistivity at 20℃ (Ωmm²/m) | 0.78 |
| Temperature factor of resistivity (20℃~200℃) X10⁻⁶/℃ | 3.7~3.9 |
| Thermal conductivity, λ/ W/(m*℃) | 11 |
| Curie point Tc/ ℃ | 230 |
| Elastic Modulus, E/ Gpa | 144 |
Coefficient of Thermal Expansion
| Temperature Range (℃) | α1/10⁻⁶℃⁻¹ | Temperature Range (℃) | α1/10⁻⁶℃⁻¹ |
|---|---|---|---|
| 20~-60 | 1.8 | 20~250 | 3.6 |
| 20~-40 | 1.8 | 20~300 | 5.2 |
| 20~-20 | 1.6 | 20~350 | 6.5 |
| 20~-0 | 1.6 | 20~400 | 7.8 |
| 20~50 | 1.1 | 20~450 | 8.9 |
| 20~100 | 1.4 | 20~500 | 9.7 |
| 20~150 | 1.9 | 20~550 | 10.4 |
| 20~200 | 2.5 | 20~600 | 11.0 |
Mechanical Properties
| Tensile Strength (Mpa) | Elongation (%) |
|---|---|
| 641 | 14 |
| 689 | 9 |
| 731 | 8 |
Heat Treatment Processes
Annealing for Stress Relief
Heated to 530~550℃ and hold 1~2 hours, then cool down.
Annealing
To eliminate hardening from cold-rolled or cold drawing processes. Heat to 830~880℃ in vacuum, hold for 30 minutes.
Stabilization Process
- In protective media, heated to 830℃, hold 20 minutes to 1 hour, then quench
- Due to stress from quenching, heat to 315℃, hold 1~4 hours
Precautions
- Cannot be hardened by heat treatment
- Surface treatment options: sandblasting, polishing, or pickling
- Alloy can be cleaned using 25% hydrochloric acid pickling solution at 70℃ to remove oxidized surface
Available Forms
| Alloy Name | Type | Dimensions |
|---|---|---|
| HUONA-Alloy-4J36 | Wire | D=0.1~8mm |
| HUONA-Alloy-4J36 | Strip | W=5~250mm, T=0.1mm |
| HUONA-Alloy-4J36 | Foil | W=10~100mm, T=0.01~0.1mm |
| HUONA-Alloy-4J36 | Bar | Dia=8~100mm, L=50~1000mm |
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Company
Huona (Shanghai) New Material Co., Ltd.
Location
1900 Mudanjiang Road, Baoshan District, 201999, Shanghai, China
Contact Person
Roy