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Сообщение от sneg
А что за сталь использует Sinn?
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Зинн использует несколько типов стали и плюс покрытие.Вот кстати про содержания никеля в Зинновских корпусах и браслетах:
"nickel-free metals and nickel release
Euro standard 1811 was implemented in German law in 2000, aimed at avoiding nickel allergies. This standard defines and regulates nickel release.
Nickel release is basically a measure of the release of nickel into the skin. The emission of nickel can result in allergic reactions. The standard stipulates that no more than 0.5 µg of nickel may be released per square centimeter of skin per week. This limit may not be exceeded by any product coming into direct and long-term contact with the skin.
The level of nickel release is not determined by the nickel content of a metal, rather by its corrosion resistance. Only through corrosion processes can nickel escape from a steel alloy in the form of ions or complexes. In highly corrosion-resistant steel, the nickel therefore remains stably bonded in the steel even if it has a relatively high nickel content. For example, stainless steel containing nickel (content 12.5% to 15%) is used even in medical implants, without any allergic reactions being observed. At Sinn we also use this same grade of steel (DIN 1.4435). Its nickel release is 50 times lower than the value prescribed by EURO standard 1811. This corresponds to 2%.
There are also grades of steel with a residual nickel content of less than 0.2%. This, however, is merely the impurity traces of nickel measurable in all types of stainless steel and not an alloy component. In this case and also in the case of special case backs offered by Sinn, we therefore refer to nickel-free steel although strictly speaking it is non-nickel-alloyed steel."
А вот один из типов метала ,используемых Зинном, от подводных лодок.
"submarine steel
Special grade of steel developed by ThyssenKrupp for the outer shells of the very latest non-nuclear submarines, the 212 class, of the German navy.
Our U series diving watches are made entirely from this special grade of steel.
This material is 100% austenic steel; it is exceptionally strong and has superior non-magnetic properties. Its mechanical strength is more than 1.55 times that of the usual watch case steel AISI 316L.
A further advantage of using this steel in the manufacture of diving watches lies in its unique saltwater resistance. Normal case steel has to be rinsed in fresh water after contact with saltwater, as long-term exposure to saltwater can, in adverse circumstances, lead to corrosion. Submarine steel, by contrast, is completely resistant to prolonged contact with saltwater. Also, submarine steel is, on account of its ductility, extremely resistant to cracking, thereby further increasing its reliability."
