Vintage 1975 tungsten wire spool from Obtainium Science and Surplus

Tungsten Wire: The Science, History, and Modern Applications of Wolfram

A roll of tungsten wire from 1975 for sale from Obtainium Science and Surplus. The spool is metallic with a white label on top displaying handwritten and printed details, including "TUNGSTEN-NS-WIRE," "GTE SYLVANIA," and "APR 23 '75." The wire is neatly wound around the spool, which rests on a textured metal surface. A ruler at the bottom of the image provides scale.

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Tungsten wire, often called Wolfram wire, is one of science and industry's most versatile and durable materials. Its unmatched heat resistance, strength, and precision have been a cornerstone of innovation for decades. Whether repairing crosshairs in a microscope, powering an electron microscope, or crafting high-temperature experiments, tungsten wire delivers unparalleled performance.

In this article, we’ll take a closer look at the unique properties of tungsten wire. We’ll explore its fascinating history and the wide range of applications it serves. By the end, you'll see why this remarkable material is invaluable to scientists, engineers, and hobbyists alike. Let’s dive in!

A roll of tungsten wire from 1975 for sale from Obtainium Science and Surplus. The image shows the spool from the side, revealing a darkened, metallic wire wound tightly around it. The spool appears aged, with signs of wear and oxidation. The background is a textured metal surface.

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What Makes Tungsten Wire So Special?

Tungsten wire stands out for its exceptional physical and chemical properties:

  • High Melting Point: At 3,422°C (6,192°F), tungsten has the highest melting point of all metals, making it ideal for high-temperature applications.
  • Durability: Its density (19.25 g/cm³) and tensile strength make it resistant to wear and corrosion.
  • Precision: With diameters as fine as 0.00191 inches, tungsten wire is perfect for delicate tasks like crosshair repair or electron microscopy.
  • Low Thermal Expansion: Tungsten maintains its shape under extreme temperatures, ensuring reliability in precision instruments.

These properties make tungsten wire indispensable in fields ranging from scientific research to industrial manufacturing.

A Brief History of Tungsten Wire

Tungsten's journey began in the late 18th century when it was first isolated as a metal. By the early 20th century, its applications expanded rapidly, particularly in incandescent light bulbs. In the 1970s, tungsten wire became a staple in scientific instruments, including electron microscopes and radiation detectors.

Today, vintage tungsten wire from this era, such as those available at Obtainium Science and Surplus, is rare. Its historical significance and excellent condition make it a treasure for both collectors and professionals.

Close-up of a roll of tungsten wire from 1975 for sale from Obtainium Science and Surplus, showing a crack on the spool's metal rim. A red arrow points to the crack, emphasizing the damage. The surface of the spool appears worn and aged.

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Key Applications of Tungsten Wire

1. Electron Microscopy

Tungsten wire is a critical component in electron microscopes, where it serves as a source of electrons. Its ability to withstand high temperatures and emit electrons reliably makes it essential for high-resolution imaging.

2. Crosshair Repair in Optical Instruments

Tungsten wire's fine diameter and strength make it perfect for repairing or replacing crosshairs in microscopes, telescopes, and rifle scopes. Its durability ensures long-lasting precision.

3. High-Temperature Experiments

From furnace heating elements to aerospace components, tungsten wire’s heat resistance makes it a go-to material for extreme temperature experiments and applications.

4. Jewelry Making and Crafting

Tungsten wire’s strength and flexibility make it a favorite among jewelers and crafters. Its resistance to tarnishing ensures that creations remain pristine over time.

Close-up of the bottom of a roll of tungsten wire from 1975 for sale from Obtainium Science and Surplus, highlighting cracks in the metal spool. Two red arrows indicate the damaged areas. The spool's base has circular cutouts, with some filled with cork-like material. The surface appears aged and oxidized.

Why Choose Vintage Tungsten Wire?

Vintage tungsten wire, like the 1975 spool available at Obtainium, offers unique advantages:

  • Proven Quality: Manufactured during an era of strict standards, this wire is built to last.
  • Historical Value: Owning a piece of scientific history adds a layer of intrigue and authenticity to your projects.
  • Versatility: Whether you’re a scientist, engineer, or hobbyist, this wire adapts to your needs.
A roll of tungsten wire from 1975 for sale from Obtainium Science and Surplus. The image focuses on the top of the spool, showing a white label with green and blue handwritten text, including specifications like "NS 55," "AW237-C," and "1.91 METERS." The label is slightly worn but still legible. The spool has a central hole and rests on a textured metal surface.

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Why This Roll Tungsten Wire Belongs in Your Toolkit

Tungsten wire is not just a material but a gateway to innovation. Whether you are pushing the boundaries of science, repairing precision instruments, or creating something entirely new, tungsten wire provides unmatched performance.

At Obtainium Science and Surplus, we’re proud to offer a 152-meter spool of vintage 1975 tungsten wire in perfect condition. This rare find is a testament to the continuing value of high-quality materials.


Ready to explore the possibilities of tungsten wire?

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