400 Series · UNS S40900
A ferritic stainless steel grade (400 series) — the lowest-cost common stainless, widely used in automotive exhaust.
| Element | Range (%) |
|---|---|
| Cr | 10.5 – 11.75 |
| Ni | ≤ 0.5 |
| C | ≤ 0.08 |
Other notable elements: Ti stabilized.
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