Stainless steel mainly consists of iron and is refined through the addition of amongst others nickel and chromium. This means that the corrosion behavior, i.e. the resilience against acids and moisture, is being improved.
Alloying elements make steel stainless
Standardized, stainless steel has a chromium content of at least 10.5%. Stainless steel 316L moreover contains 10 to 13% nickel as well as molybdenum. Each alloying element thereby contributes very specific characteristics. Chromium makes the steel corrosion-resistant or stainless as we say. Its effect is enhanced through molybdenum. Nickel increases the resilience against acids. As 316L does not extrude any nickel and is also non-oxidizable, it can be even implanted in the human body. Therefore this steel is often referred to as surgical steel.
316L stainless steel is ideal for watches
The specific chemical composition of the 316L stainless steel alloy makes it extra corrosion-resistant. This is of great advantage especially for watches, as they can get in contact with salt water. Moreover, not each stainless steel is anti-allergic, as only cases made of 316L steel are suitable for allergy sufferers. Therefore Circula uses 316L stainless steel for its watch cases.
Stainless steel is completely recyclable
On top, stainless steel is 100% recyclable and can be reused, e.g. in watch production, after melting it down.