What is the difference between stainless steel 403 and 304?
Release time:
2025-02-08
The main difference between stainless steel 304 and 403 lies in their corrosion resistance and hardness. Stainless steel 304 has better corrosion resistance and toughness, making it suitable for food processing, medical devices, and other applications; while stainless steel 403 has higher hardness and greater strength, making it suitable for making tools, bearings, and other applications.
The main differences between stainless steel 304 and 403 lie in their corrosion resistance and hardness. Stainless steel 304 has better corrosion resistance and toughness, making it suitable for food processing, medical devices, and other occasions; while stainless steel 403 has higher hardness and greater strength, making it suitable for applications such as knives and bearings.
The specific differences are as follows:
Different microstructures: 304 is austenitic stainless steel, which has good toughness and strong corrosion resistance; 403 is martensitic stainless steel, which has high hardness and great strength.
Corrosion resistance: Stainless steel 304 contains a higher proportion of nickel and chromium, providing superior corrosion resistance, allowing it to remain stable in humid or highly acidic/alkaline environments. Although stainless steel 403 also has certain corrosion resistance, it may be slightly inferior to 304 in some specific media.
Machinability: Stainless steel 304 is easier to process, whether cutting, welding, or forming is relatively simple. In contrast, stainless steel 403 tends to harden more easily during processing, requiring more skill and attention.
Applications: Due to the above differences, the two also differ in their applications. 304 is widely used in the chemical, food, and pharmaceutical fields; while 403 is more commonly used in the automotive, medical equipment, and kitchenware industries.
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