How to Identify the Material of Tubes in Furniture Fittings?
Nov 21, 2025
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Identifying the material of tubes in furniture fittings is a practical skill that helps with maintenance, purchasing replacements, or simply understanding the quality of a piece. You can become proficient at this by using a systematic approach that combines simple observation and a few basic tests.
Quick Identification Guide at a Glance
| Material | Magnet Test | Weight | Key Visual Clues | Common Finishes |
|---|---|---|---|---|
| Carbon Steel | Sticks Strongly | Very Heavy | Rust in scratched areas. | Zinc, Chrome, Powder Coat |
| Stainless Steel | Usually Sticks* | Heavy | No rust, even when scratched. Silvery. | Brushed, Polished, Bead-Blasted |
| Aluminum | Does Not Stick | Lightweight | Often colored (bronze, black, etc.). | Anodized, Powder Coated |
| Brass | Does Not Stick | Heavy | Yellow/Golden color. | Polished, Brushed, Lacquered |
| Plastic | Does Not Stick | Very Lightweight | Feels warm, can see mold seams. | Painted, Molded Color |
Note: Some high-quality stainless steel (like 304) is non-magnetic. If it's heavy, silvery, non-magnetic, and doesn't rust, it's likely 304 Stainless Steel.
By combining the Magnet Test with observations of Weight and Appearance, you can confidently identify the material of tubes in most furniture fittings.