304 vs 430 Stainless Steel - Which Grade Belongs in a Commercial Kitchen?
Who this is forThis article is for restaurant and kitchen owners comparing 304 and 430 stainless steel for their commercial kitchen equipment.
Use grade 304 stainless steel for any commercial kitchen surface that meets food, water or cleaning chemicals, and keep grade 430 for dry trim and panels only. Grade 304 carries about 18 percent chromium and 8 percent nickel, so it shrugs off salt, acid and daily washing. Grade 430 has similar chromium but almost no nickel, which makes it cheaper and magnetic but far more likely to rust in a hot, wet kitchen. The two look almost identical on a showroom floor. The difference shows within a year of real service.
Key facts
- Grade 304 stainless steel contains about 18 percent chromium and 8 percent nickel, while grade 430 contains around 17 percent chromium and almost no nickel.
- Grade 304 is austenitic and non-magnetic, while grade 430 is ferritic and magnetic, which is one quick way to tell them apart.
- Grade 304 resists corrosion from salt, acid and constant washing far better than grade 430, which is prone to rust spots in wet kitchen conditions.
- Grade 304 should be used for all food contact and wet-side surfaces, while grade 430 is only suitable for dry trim, panels and low-moisture parts.
| Grade 304 (higher grade) | Grade 430 (lower grade) | |
|---|---|---|
| Chromium content | About 18 percent | About 17 percent |
| Nickel content | About 8 percent | Almost none |
| Food contact safe | Yes, safe for all food contact surfaces | Limited, not recommended for wet food contact |
| Corrosion resistance | Excellent in hot, wet and salty conditions | Moderate, prone to rust in wet conditions |
| Cost | Higher upfront cost | Lower upfront cost |
| Recommended for commercial kitchens | Yes, for all food and wet-side surfaces | Only for dry trim and low-moisture panels |
What sets 304 and 430 apart
The gap between these two grades comes down to nickel. Grade 304 is an austenitic steel with roughly 8 percent nickel, which gives it strong corrosion resistance and a non-magnetic structure. Grade 430 is a ferritic steel with little or no nickel, so it costs less, holds a magnet and offers weaker protection against rust and pitting.
A quick way to tell them apart
Hold a magnet to the surface. Grade 430 is magnetic and will grip the magnet firmly, while grade 304 is essentially non-magnetic. This simple check does not replace a written grade confirmation, but it gives you a fast on-site indication of what you are looking at.
Why the difference matters in a kitchen
A commercial kitchen exposes steel to salt, lime, vinegar, hot oil and strong sanitisers every day. Under that load grade 430 develops rust spots and surface pitting far sooner than grade 304, and a corroding surface is harder to keep hygienic.
- Food safety, because a pitted or rusting surface harbours bacteria that cleaning cannot fully reach.
- Lifespan, because 304 stays sound for many years while 430 degrades quickly on the wet side of a kitchen.
- Appearance, because rust streaks make even a clean kitchen look neglected.
- Cost over time, because replacing corroded 430 equipment erases any saving on the first purchase.
Where each grade belongs
Any surface that touches food, water or cleaning chemicals should be grade 304. That covers work tables, sinks, food storage, exhaust hoods and everything on the wet side of the kitchen. Grade 430 can be acceptable for dry decorative trim, wall cladding or panels that never meet food or moisture, where the lower cost carries little risk.
Choosing the right grade is about matching the metal to the job. For food contact and wet-side surfaces, grade 304 is the grade that stays hygienic, looks professional and lasts the distance.
Looking at the equipment itself? See our range of grade 304 stainless steel prep tables. It all starts with our materials and quality standards. For more on this, read our guide to 304 vs 202 stainless steel.
Come across a term you are not sure about? Our commercial kitchen equipment glossary explains 100+ terms in plain English.
