Short answer: The numbers are shorthand for nominal chromium and nickel content: 18/8 generally refers to 304-type stainless steel, while 18/0 usually refers to nickel-free ferritic 430. The label 18/10 is commonly used in marketing and does not by itself prove a separate or superior grade.
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 |
|---|---|---|
| 18/8 | About 18% chromium and 8% nickel | Common shorthand for 304 |
| 18/10 | Marketing designation for nominally higher nickel | Often still within 304 chemistry |
| 18/0 | Chromium stainless with little or no nickel | Often 430; magnetic |
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
- Purchase to a formal grade and product standard, not a consumer label.
- Check the MTC chemistry and traceability for commercial orders.
- Match corrosion, forming and magnetic behavior to the finished product.
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
- Assuming 18/10 is automatically heavier or thicker
- Using the label as a substitute for S30400 or EN 1.4301
- Calling magnetic 18/0 material fake stainless steel
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
Use a grade such as 304 or 430, the applicable standard, finish, dimensions, certificate and food-contact requirements. Consumer-facing 18/8 wording can be added separately.
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 18/10 better than 18/8?
Not necessarily. Both labels are commonly associated with 304-type material, and product design, thickness and finish can matter more.
Is 18/0 stainless steel safe?
18/0 grades are widely used in appropriate products, but the complete article must meet the food-contact requirements of its market.
Why is 18/0 magnetic?
It is commonly ferritic stainless steel such as 430, whose crystal structure is magnetic.
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.