Hastelloy C-276 Alloy Strip Foil

Hastelloy C-276 is one of the most widely used nickel-molybdenum-chromium superalloys known for its excellent resistance to corrosion in a wide range of aggressive environments. When formed into strip or foil, Hastelloy C-276 maintains its advantageous properties, making it ideal for applications requiring thin materials that can withstand harsh conditions.

Thickness Range

Hastelloy C-276 strip and foil are available in various thicknesses to suit different application requirements. Typically, the thickness ranges for these forms are:

Strip: Usually ranges from 0.1 mm (0.004 inches) to 3 mm (0.120 inches).

Foil: Even thinner than strip, often ranging from 0.025 mm (0.001 inches) to 0.5 mm (0.020 inches) or even thinner.

1. Alloy Melting and Composition Control

The process begins with melting high-purity raw materials, including nickel, chromium, molybdenum, and other alloying elements, in an electric arc furnace or a vacuum induction furnace.

Careful control of the alloy composition is essential to ensure the desired properties of the final material, including corrosion resistance, mechanical strength, and thermal stability.

2. Casting or Forming

After the alloy composition is finalized, the molten metal is cast into ingots or billets using casting techniques such as vacuum arc remelting (VAR) or electroslag remelting (ESR).

In some cases, the alloy may undergo hot working processes like extrusion or forging to further refine the microstructure and shape the material into intermediate forms.

3. Hot Rolling

The cast ingots or billets are then heated to high temperatures and passed through a series of rolling mills to reduce their thickness and shape them into long strips.

Hot rolling helps achieve the desired thickness reduction and grain structure refinement while maintaining the material's ductility and mechanical properties.

4. Cold Rolling

The hot-rolled strips are then cold rolled to further reduce their thickness and improve surface finish.

Cold rolling also imparts additional strength and hardness to the material while maintaining tight dimensional tolerances.

5. Annealing

After cold rolling, the strips undergo annealing, a heat treatment process that relieves internal stresses, refines the microstructure, and improves the material's ductility and formability.

Annealing may be performed in controlled atmospheres or vacuum furnaces to prevent oxidation and ensure uniform heating and cooling.

6. Surface Treatment

Depending on the application requirements, the Hastelloy C-276 strips and foils may undergo surface treatments such as pickling, polishing, or coating to enhance their surface finish, cleanliness, or corrosion resistance.

7. Inspection and Quality Control

Throughout the manufacturing process, the strips and foils undergo rigorous quality control inspections to ensure they meet the specified dimensional tolerances, mechanical properties, and surface finish requirements.

Non-destructive testing techniques such as ultrasonic testing or eddy current testing may be employed to detect any defects or irregularities in the material.

8. Cutting and Packaging

Once the strips and foils pass inspection, they are cut to the desired lengths and packaged according to customer specifications.

Care is taken to protect the material from damage during handling, transportation, and storage to maintain its quality until it reaches the end user.

1. Wafer Handling Equipment

Wafer Carriers: Hastelloy C-276 strip and foil are used to manufacture wafer carriers, which are specialized containers used to hold semiconductor wafers during various processing steps, including cleaning, etching, and deposition.

Wafer Frames: Thin strips of Hastelloy C-276 are used to construct frames that hold individual wafers securely during processing and transportation within the fabrication facility.

2.Compatibility with Semiconductor Materials

Non-Reactive: Hastelloy C-276 strip and foil do not react with semiconductor materials, such as silicon, silicon dioxide, and photoresists, ensuring the purity and integrity of semiconductor devices during fabrication.

Biocompatibility: In applications involving the deposition of biomaterials or biocompatible coatings on semiconductor wafers, Hastelloy C-276 ensures compatibility with these materials without causing contamination or adverse reactions.

3. Customizable Form Factors

Thin-Film Deposition: Hastelloy C-276 foil is suitable for use as a substrate material in thin-film deposition processes, where uniform deposition of materials onto semiconductor wafers is critical for device performance and yield.

Flexible Designs: The flexibility of Hastelloy C-276 strip and foil allows for the fabrication of custom-designed components tailored to specific semiconductor processing equipment and requirements.

1.Avoid Hydrogen Embrittlement

Hydrogen Embrittlement Risk: Hastelloy C-276 can be susceptible to hydrogen embrittlement in certain conditions, particularly in environments where hydrogen gas is present. Take precautions to minimize exposure to hydrogen during processing and use.

2.Avoid Mixing with Incompatible Materials

Galvanic Corrosion: Hastelloy C-276 should not be in direct contact with materials that are significantly different in nobility, as this can lead to galvanic corrosion. Use proper insulation or barriers to prevent direct contact with incompatible materials.

3.Personal Protective Equipment (PPE)

Use Appropriate PPE: When handling or processing Hastelloy C-276 strip and foil, use appropriate personal protective equipment (PPE), such as gloves, goggles, and protective clothing, to prevent injury and exposure to hazardous substances.

4.Training and Education

Provide Training: Ensure that personnel handling Hastelloy C-276 alloy strip and foil are adequately trained in proper handling techniques, including awareness of potential hazards, proper storage procedures, and safe operation of equipment.

5.Material Certification and Traceability

Verify Material Certifications: When procuring Hastelloy C-276 strip and foil, verify that the material is accompanied by appropriate certifications and documentation to ensure compliance with industry standards and specifications.

Maintain Traceability: Maintain records of material certifications and traceability information to track the origin and history of the material, facilitating quality control and troubleshooting if issues arise.

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