Short answer: 304 is the most common starting grade for food-contact equipment because it combines corrosion resistance, formability and cleanability. 316 is preferred for salty, acidic or more aggressive service. 430 can suit selected dry or mild components, but compliance depends on the finished article, surface and applicable market rules, not the grade name alone.
This guide is written for stainless steel buyers, sourcing teams, engineers and product manufacturers. The purpose is not to declare one universal winner, but to turn a broad material question into a specification that a mill or service center can quote, process and inspect consistently.
Quick Comparison
| Option | Key point | Typical use or decision |
|---|---|---|
| 304 | General food processing, sinks, cookware and tanks | Good all-round choice |
| 316/316L | Salty, acidic or aggressive cleaning exposure | Higher chloride resistance |
| 430 | Dry appliance panels and selected cookware components | Magnetic and nickel-free; review corrosion conditions |
| 201 | Cost-sensitive, controlled environments | Verify local food-contact rules and release performance |
The table is a starting point. Actual performance depends on the governing standard, delivered condition, dimensions, surface finish, fabrication route and service environment. Commercial names should never replace a complete purchase specification.
What Buyers Should Evaluate
- Define food chemistry, temperature, contact time and cleaning agents.
- Use smooth, cleanable surfaces and hygienic joint design.
- Confirm the finished product against the regulations of the destination market.
For production orders, share the end use rather than requesting a grade or finish in isolation. A supplier can then review corrosion exposure, forming severity, welding, visual requirements and packing before material is cut. This early review is usually less expensive than correcting a rejected shipment or unstable production trial.
Common Purchasing Mistakes
- Calling every 304 product automatically food grade
- Ignoring welds, crevices and polishing compounds
- Using a decorative finish that cannot be cleaned consistently
These mistakes are avoidable when drawings, approved samples, inspection methods and certificate requirements are agreed before production. For visual products, retain a signed master sample. For functional dimensions, define where and how measurements will be taken.
Recommended RFQ Wording
Request grade and standard, finish roughness where relevant, certificate, fabrication route and a statement of the destination market. Product testing may still be required.
Also include order quantity, acceptable quantity variation, destination, required delivery date and whether partial shipments are allowed. If a requirement is critical, make it measurable and place it on the purchase order rather than only in an email conversation.
How Still Steel Supports the Project
Still Steel supplies stainless steel coil, strip and sheet and provides slitting, cut-to-length, brushing, polishing and protective-film services. We can compare available mill material with your drawing, prepare trial quantities and preserve heat-number traceability through service-center processing.
Send the grade, dimensions, annual volume and application to vip@still-steel.com, or discuss the requirement on WhatsApp.
Frequently Asked Questions
Is 304 food grade?
304 is widely used for food-contact applications, but the complete article must still meet relevant design, hygiene and regulatory requirements.
When is 316 preferred for food equipment?
Use 316 when salt, acidic products, elevated temperature or aggressive cleaners increase the risk of pitting.
Can 430 touch food?
430 is used in some food and cookware applications. Suitability depends on exposure, finish, design and the rules of the destination market.
Technical References
Reference documents support general selection and fabrication principles. The final material decision must follow the applicable contract, standard, regulation and engineering review for the specific product.