materials-dat/materials-dat.md
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- [[metal-dat]]
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+- [[magnetic-dat]]
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## ref
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mechanics-dat/physics-dat/magnetic-dat/magnetic-dat.md
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# magnetic-dat
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-- [[motor-dat]]
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+- [[motor-dat]] - [[metal-dat]]
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+### 1. Primary Ferromagnetic Elements
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+In their pure form at room temperature, only a few elements are strongly attracted to magnets:
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+* **Iron (Fe):** The most common magnetic metal found in daily life.
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+* **Nickel (Ni):** Often used in coins and plating; it is magnetic but weaker than iron.
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+* **Cobalt (Co):** Highly magnetic and maintains its properties at high temperatures.
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+* **Gadolinium (Gd):** Becomes strongly ferromagnetic at temperatures below 20°C (68°F).
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+
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+### 2. Common Magnetic Alloys
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+Most magnetic objects we use are mixtures of different elements:
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+* **Steel:** Since steel is primarily iron, most types (like carbon steel) are magnetic.
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+* **Stainless Steel (Some):**
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+ * **Ferritic & Martensitic (e.g., 430, 410):** These **are** magnetic.
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+ * **Austenitic (e.g., 304, 316):** These are usually **not** magnetic due to their crystal structure.
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+* **Neodymium Magnets:** A powerful alloy of Neodymium, Iron, and Boron (NdFeB).
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+
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+### 3. Non-Magnetic Metals (Paramagnetic & Diamagnetic)
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+The following metals are **not** attracted to household magnets:
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+* **Aluminum**
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+* **Copper**
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+* **Gold**
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+* **Silver**
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+* **Lead**
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+* **Titanium**
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+* **Brass & Bronze** (unless they contain significant iron impurities)
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+*
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+
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+
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+
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+## ref
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+