Stainless steel is the default material for kitchen and baking tools — but not all stainless steel is the same. The two grades you will meet most often in sourcing are 304 and 430. They look almost identical and both are food-safe, yet they are different materials with different costs and different best uses. Here is what every buyer should know.
What is the difference?
| 304 stainless | 430 stainless | |
|---|---|---|
| Type | Austenitic | Ferritic |
| Chromium | ~18% | ~17% |
| Nickel | ~8% | ~0% (trace) |
| Magnetic | Generally non-magnetic | Magnetic |
| Corrosion resistance | Higher (better in water/acid contact) | Good for dry-to-moderate use |
| Cost | Higher | Lower |
The practical difference comes down to two things: nickel content and corrosion resistance. Nickel gives 304 its superior resistance to rust and pitting, which matters when a tool is washed repeatedly, soaked, or used with acidic foods. 430 lacks nickel, so it costs less — but it is more susceptible to corrosion if left wet or exposed to acids over time.
Which grade for which product?
There is no universal "right" answer — it depends on the product and how it is used.
- Cookie cutters, cake molds, and baking pans: 430 is common and cost-effective. They are used for short contact with dough, washed and dried promptly, and 430's magnetic property is even useful for magnetic storage.
- Whisks, mashers, ladles, and tools in constant water contact: 304 is the safer choice. These tools spend time in water and acidic ingredients, where 430's weaker corrosion resistance becomes a real defect risk.
- Knives and slicers: 304 or higher-carbon options depending on the application — but always food-grade certified steel.
Both are food-safe — if the grade is real
Here is the catch: both 304 and 430 are acceptable food-contact steels, but only if the grade is what the supplier says it is. Grade substitution (marketing 430 as 304, or mixing scrap steel) is a real problem in low-cost sourcing. Ask suppliers to state the grade on the specification sheet, and for high-volume orders, consider requesting a material test certificate.
What to put in your specification sheet
Write the grade down, together with the product's functional requirements (contact time with water, dishwasher exposure, magnetic storage, decoration). A supplier who quotes against your specification — instead of asking you to pick the cheapest line — is the one worth keeping.