Will 443 rust?｜Foshan Huili Metal Technology Co., Ltd.（佛山市惠利金属科技有限公司）

Conclusion：443 resists atmosphere and fresh water better than 430 and close to 304, but still pits in high chloride — not absolutely rust-free.

This conclusion is compiled from our technical article: 430、436、439、443、444到底差在哪？一张耐蚀梯度表说清 (443不锈钢耐蚀经验). Verify against your actual duty; call us to discuss.

Selection notes

443 is Ti-stabilized ferritic, better than 430 in atmosphere/fresh water; still pick 316L for high-salt coast.

Industry & scenario

Grade comparison & substitution

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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.

Spell out the working conditions — we handle the rest

Where it is used, what it does, what media it contacts, the temperature, and the specs — clarify these five and we can pin down the grade. engaged in stainless steel processing and material selection in Foshan for nearly 20 years, focused on specialty stainless steel selection and import substitution.