Stainless steel combines strength with excellent corrosion resistance, making it the material of choice for medical, food, marine and semiconductor equipment parts.
Common Grades
| Grade | Key properties | Typical uses |
|---|---|---|
| 303 | Free-machining, good corrosion resistance | Shafts, fittings, fasteners |
| 304 | Excellent corrosion resistance, most common | General industrial and food equipment |
| 316 / 316L | Superior resistance to chlorides and chemicals | Medical, marine, chemical |
| 17-4 PH | High strength after heat treatment | Aerospace, high-load parts |
| 420 / 440C | Hardenable, wear resistant | Tools, valve parts, bearings |
Finishes
Passivation, bead blasting, polishing, electropolishing and black oxide.
Frequently Asked Questions
Why is stainless steel more expensive to machine than aluminum?
It is harder and work-hardens, so cutting speeds are lower and tool wear is higher, which increases machining time.
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