Stainless Steels
Steels that protect themselves against corrosion with at least 10.5% chromium.
Steel & Raw Materials
Stainless Steels
Stainless steels resist corrosion thanks to a thin chromium oxide layer that forms spontaneously on the surface and re-forms with oxygen even when damaged.
Austenitic grades 304 and 316L are preferred for food, chemical and marine applications; martensitic 420, being hardenable, for blades, pump shafts and mould parts.
| Grade | Mat. No. | Typical composition (%) | Typical use |
|---|---|---|---|
| AISI 304 | 1.4301 | C ≤ 0.07 · Cr 17.5–19.5 · Ni 8.0–10.5 | Food, kitchen, general use |
| AISI 303 | 1.4305 | C ≤ 0.10 · Cr 17–19 · Ni 8–10 · S 0.15–0.35 | Machined parts |
| AISI 316L | 1.4404 | C ≤ 0.03 · Cr 16.5–18.5 · Ni 10–13 · Mo 2.0–2.5 | Chemical, marine |
| AISI 420 | 1.4021 | C 0.16–0.25 · Cr 12–14 | Blades, pump shafts, moulds |
Values are typical ranges from the relevant standards; exact values are provided with the mill certificate of each delivery.
Applications
- Food and Beverage Equipment
- Chemical and Process Plants
- Marine
- Pump and Valve Parts
- Medical Equipment
- Architectural Applications
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