304 STAINLESS
The general-purpose stainless benchmark.
304 combines corrosion resistance, formability and broad availability. It is widely used for equipment, covers, fluid-handling hardware and machined components that do not need the improved chloride resistance of 316L.
- 01Industrial equipment and enclosures
- 01Food and laboratory hardware
- 01Brackets, fittings and fasteners
- 01Machined and fabricated assemblies
SELECTION NOTES
Choose 316L when chlorides dominate.
304 is not always the lowest-cost alloy to machine because it work-hardens and retains heat. Tooling, feeds and workholding must keep cutting action stable to protect finish and tolerance.
- 02Avoid rubbing tools and interrupted light cuts
- 02Specify passivation requirements
- 02Review galvanic contact with other metals
- 02Use 316L for salt or aggressive chemical exposure
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Start a project ↗COMMON QUESTIONS
What engineers ask.
What is the main difference between 304 and 316L?+
316L contains molybdenum and generally resists chlorides and pitting better. 304 is usually more economical for general environments.
Can 304 stainless be passivated?+
Yes. Passivation removes free iron contamination and supports the alloy's natural protective oxide layer.