Раз уж на форуме собралось много знатных сталеваров, предлагаю обсудить достоинства и недостатки сталей из которых изготавливаются корпус и браслет часов. За отправную точку предлагаю взять Ролекс. Как эталон.
Небольшое видео
Вот
тут лежит оригинал статьи
Вот сама статья:
WHAT IS THE BIG DEAL OF ROLEX’S USE OF 904L STEEL?
Posted on May 28, 2012 by Matt Becker
Starting in the early 2000’s Rolex transitioned from using the industry standard 316L stainless steel to 904L stainless steel. Rolex initially utilized 904L in the case only, but the newer sport watches utilize 904L in both the case and the bracelet. Even though stainless steel is supposed to prevent rusting and pitting from ocean salt water and sweat, Rolex found excess wear in the caseback threads and watch case from salt water seeping into the threads and sitting there undisturbed for years between watch services. Salt and other minerals proved to be catalysts for corrosion and deterioration around the threads that hold the caseback.
To prevent premature deterioration, Rolex moved to 904L, a stainless steel with slightly higher nickel and chromium content. 904L is also resistant to chloride, a potential cause for pitting and corrosion.
All Rolex stainless steel, platinum, and gold are made in the Rolex factory.
904L stainless steel is harder and does not machine well than other steels used in watches. Subsequently, Rolex had to design its own tools to work with the material and utilizes a 250 ton press to stamp the initial cases. In addition to higher rust, corrosion, and pitting resistance, 904L polishes quite well with the correct tools and know-how. The brushed finishes of 904L leave a warm grain that is somewhat harder to scratch, although watch strap scratches are almost entirely impossible to avoid.
Watch wearers who are sensitive to nickel might feel a different wearing a Rolex, but it has not been reported to be a wide spread issue.
Although other watch manufacturers use 316L surgical quality stainless steel, Rolex sets itself apart by using a slightly harder, more chemical resistant steel that is yet another quality that sets Rolex into a different category watches of watches.
P.S. Фото царапин, вмятин, углублений, возникших после столкновения часов с дикими животными, транспортными средствами и космическими кораблями,
приветствуются. Комментарии специалистов as well.
P.P.S. Вот, что пишет сам производитель по этому поводу:
цитирую: "Only a robust corrosion-resistant, stainless-steel alloy can meet the uncompromising standards of Rolex. It, therefore, uses a unique composition of 904L steel, which can withstand the harshest environments, from the highest peaks to the depths of the ocean. Rolex 904L steel can be polished to achieve an impeccable finish, contributing to the Oyster’s characteristic beauty".