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I. Heat Resistant Temperature Range of Silicon Steel Sheets

The heat resistance temperature of silicon steel sheets generally ranges from 500 °C to 800 °C, with exact values determined by silicon content and manufacturing processes. Grades with higher silicon content usually deliver superior heat resistance, as silicon effectively improves the material’s oxidation resistance. It should be noted that prolonged exposure to high temperatures may degrade magnetic performance, so temperature must be strictly controlled in practical applications.

II. Key Factors Affecting Heat Resistance

1. Silicon content: Higher silicon content enhances heat resistance, yet excessively high silicon impairs machinability.
2. Manufacturing process: Cold-rolled silicon steel sheets normally feature more stable heat resistance than hot-rolled counterparts.
3. Coating treatment: Special coatings can boost oxidation resistance and extend service life under high-temperature conditions.

III. Precautions for Practical Application

In equipment such as motors and transformers, the heat resistance of silicon steel sheets directly governs equipment reliability and service lifespan. Sufficient temperature margin shall be reserved during design to avoid local overheating. Meanwhile, regular monitoring of operating temperature ensures silicon steel sheets stay within the optimal working range.