Does 304 Being Magnetic Mean It's Fake?

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304 · 磁性 · 材质 · 检测

Cold working produces deformation martensite, causing weak magnetism; how to distinguish this from counterfeit material.

304 is essentially non-magnetic in the annealed state, but after cold rolling, bending, or stretching, deformation martensite produces weak magnetism, which is a normal phenomenon.

How to distinguish:
- Very weak magnetism concentrated in deformed areas: mostly caused by processing.
- Strong magnetism throughout: possibly 430 ferritic or 201 substituted.
- Verification: check the mill certificate composition (Ni≥8%, Cr≥18%), perform spectral analysis or chemical spot testing.

Do not judge material solely by a magnet, and do not use a magnet as an acceptance criterion.

本文由 SteelWe 编辑与行业专家整理，内容仅供行业交流参考，不构成交易或投资建议。引用请注明来源。

Does 304 Being Magnetic Mean It's Fake?

Cold working produces deformation martensite, causing weak magnetism; how to distinguish this from counterfeit material.

304 is essentially non-magnetic in the annealed state, but after cold rolling, bending, or stretching, deformation martensite produces weak magnetism, which is a normal phenomenon.

How to distinguish:
- Very weak magnetism concentrated in deformed areas: mostly caused by processing.
- Strong magnetism throughout: possibly 430 ferritic or 201 substituted.
- Verification: check the mill certificate composition (Ni≥8%, Cr≥18%), perform spectral analysis or chemical spot testing.

Do not judge material solely by a magnet, and do not use a magnet as an acceptance criterion.

本文由 SteelWe 编辑与行业专家整理，内容仅供行业交流参考，不构成交易或投资建议。引用请注明来源。