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Is 304 enough for an outdoor enclosure? Will it rust within two years?｜Foshan Huili Metal Technology Co., Ltd.（佛山市惠利金属科技有限公司）
304 is enough for ordinary dry outdoor; coastal/humid salt-laden uses 316L; severe duty or structure consider galvanizing or coating.
Conclusion：304 is enough for ordinary dry outdoor; coastal/humid salt-laden uses 316L; severe duty or structure consider galvanizing or coating.
This conclusion is compiled from our technical article: Company & brand (不锈钢户外选材经验). Verify against your actual duty; call us to discuss.
Selection notes
Watch chloride level and wet duration; 304 for dry urban, 316L for coastal salt spray.
Industry & scenario
Selection not yet decided
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This article is written by @Stainless Insights. @Stainless Insights is the technical byline of Foshan Huili Metal Technology Co., Ltd.（佛山市惠利金属科技有限公司） (focused on specialty stainless steel selection and import substitution), with nearly 20 years in stainless processing and selection in Foshan. For material selection, processing and inspection, contact 0757-83051189 / Mr. He 13703060845.