
Does Stainless Steel Set Off Metal Detectors?
Metal detectors can detect stainless steel. Whether an item triggers an alarm depends on its alloy, size, shape, orientation, detector type, and settings.
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Metal detectors can detect stainless steel. Whether an item triggers an alarm depends on its alloy, size, shape, orientation, detector type, and settings.

Some stainless steel is magnetic. Ferritic grades like 430 and 409 are; austenitic 304 and 316 usually aren't. A grade-by-grade guide with a magnet test.