Hard Disk Drive (HDD) Platters buying scrap price

Introduction, Construction, Components, and Recycling Value

This category is not limited to a particular Seagate, Western Digital, Toshiba, Hitachi, HGST, Samsung, Fujitsu, or IBM model. If the material meets the physical and contamination requirements of the grade, it is evaluated and priced as Hard Disk Drive (HDD) Platters. Brand names and model numbers may assist with identification and traceability, but they do not automatically determine the recycling grade or price.

An HDD platter normally consists of a rigid circular substrate covered with extremely thin functional layers. Depending on the drive generation and manufacturer, the substrate may be:

• Aluminum or an aluminum alloy

• Glass

• Glass-ceramic material

• Other specialized rigid substrate material

Each platter is coated with extremely thin magnetic and protective layers that may contain cobalt, chromium, nickel, platinum, ruthenium, or related metals. These coatings are microscopic and should not be interpreted as significant precious-metal content.

Most recycling value comes from the aluminum or glass substrate, with value influenced by substrate type, quantity, cleanliness, condition, and downstream processing requirements rather than drive capacity.

Ohata Hard Disk Drive (HDD) Platters Classification and Identification Guide

The Ohata Hard Disk Drive (HDD) Platters grade covers loose magnetic recording platters that have been removed from mechanical hard drives and prepared as a recognizable, reasonably clean recycling commodity.

A qualifying platter is generally:

• Circular, thin, and rigid

• Manufactured for a mechanical HDD

• Coated with a smooth magnetic recording surface

• Designed with a central spindle opening

• Removed from the HDD enclosure

• Free from attached circuit boards, motors, magnets, and actuator assemblies

• Reasonably clean and suitable for safe sorting and processing

HDD platters usually have a smooth, highly reflective surface. Some appear silver, smoky gray, dark gray, or slightly champagne-colored under different lighting. Surface color alone must not be used to determine substrate composition, precious-metal content, brand, model, or grade.

Both sides of an HDD platter may function as magnetic recording surfaces. Consequently, there is usually no meaningful “front” and “back” comparable to the component side and solder side of a circuit board. For inspection purposes, the two surfaces may be called Side A and Side B, but this naming does not represent different recycling grades.

To identify this category correctly, inspectors should confirm the following:

1. Confirm that the item is an HDD platter.
   It must originate from a magnetic hard drive, not an optical drive.

2. Exclude CDs, DVDs and Blu-ray discs.
   Optical discs are usually plastic, often show rainbow reflections, and do not belong in the HDD platter category.

3. Inspect the centre opening and structure.
   A platter should have a precision central opening associated with the HDD spindle assembly. Loose clamps, spacers and hub hardware should be removed unless the purchasing agreement states otherwise.

4. Check for attached components.
   Spindle motors, read/write heads, actuator arms, magnets, screws, housings and PCBs must be separated.

5. Inspect condition and contamination.
   Excessive mud, oil, adhesives, debris, fire residue or hazardous contamination can result in rejection or downgrade.

6. Separate different materials where required.
   Aluminum-substrate and glass-substrate platters may require different processing. When reliable separation is possible, they should not be mixed without prior approval.

Visual appearance or a magnet test cannot reliably identify substrate composition or coating materials. Material analysis should be used when verification is required.

Recoverable Materials, Buying Standards, and Handling

The principal potentially recoverable material in many HDD platters is aluminum from the substrate. The thin functional layers may contain industrial metals such as cobalt, nickel and chromium, with very small quantities of platinum, ruthenium or related metals in certain platter technologies.

These coating metals should not be overstated. Their concentration, recovery efficiency and economic value depend on the manufacturing technology and the processor’s refining system. Loose HDD platters should never be marketed as solid platinum, high-grade precious-metal scrap, or a guaranteed source of a specific precious metal without analytical evidence.

Ohata buying standards generally favor material that is:

• Loose and clearly identifiable

• Separated from complete HDDs

• Free of PCBs, magnets, motors and steel housings

• Dry and reasonably clean

• Free from hazardous chemicals

• Packed safely to prevent injuries and loss

• Separated from optical discs and unrelated scrap

• Sorted by material or subcategory when requested

Store platters in sturdy containers and avoid bending, drilling, or breaking them. Keep different substrate types and conditions separated whenever practical. Storage devices may still contain recoverable data and should be handled according to the owner's data-destruction requirements before recycling.

Comparison and Official Ohata Classification

HDD platters must be distinguished from several related recycling categories.

HDD platters should not be mixed with complete hard drives or HDD circuit boards, as each material is evaluated separately.

Under the official Ohata classification, any loose platter meeting the Hard Disk Drive (HDD) Platters standard is purchased at the applicable grade price regardless of manufacturer, model, or storage capacity. Final classification depends on physical inspection, substrate type, cleanliness, contamination, attached hardware, and shipment quality.

The correct Ohata classification is therefore:

Official Ohata Classification: Hard Disk Drive (HDD) Platters

All accepted loose HDD platters that meet this standard are evaluated according to the Hard Disk Drive (HDD) Platters grade price—not according to one individual drive model, capacity, brand or generation.