Our mainly stainless steel grade: ASTM/ASME Grade 304, Grade 304L,304h, 316, 316L, 316H, 316TI, 321, 321H, 309S, 309H, 310S, 310H, 410S, 2205, 904L, 2507, 254, gh3030, 625, 253MA, S30815, 317L, Type 317, 316lN, 8020, 800, 800H, C276, S32304 and others special requirement stainless steel grade.
Grade 904l Stainless State Plate Vs Grade 304l Stainless Steel Plate
High resistance of grade 904L towards stress corrosion is because of the presence of high amounts of nickel in its composition. The addition of copper to those grades develops resistance to sulphuric acid and other reducing agents. With all these protections preserving a Rolex watch practical, the realm that most Rolex wearers get nervous are scratches. Rolex gold, platinum, and 904L stainless steel does scratch with day-to-day use.
Why Don’t Other Manufacturers Use 904l Steel?
Nowadays, most chrome steel wristwatches are made from 316L stainless steel, and for a time, so was Rolex. Even though 316L metal was created so as to stop rust and pits from salt water and sweat, Rolex was discovering excess put on in the case back threads and watch case. Salt and other minerals are the catalysts wanted for corrosion and deterioration of the threads holding the case back.
- After casting and inspection, the steel is then re-melted in a vacuum to purify it and get rid of any inclusions that might diminish its corrosion resistance and lead to issues in sprucing.
- Rolex has been known to ship metal again when it doesn’t meet their exacting specifications.
- Once obtained from Rolex’s steel suppliers, Rolex casts and scans it using an electron microscope that is capable of detecting the slightest structural or floor defect.
- Rolex calls 904L chrome steel a “corrosion-resistant superalloy.” 904L differs from 316L because of further Chromium, Molybdenum, Nickel, and Copper that offers it improved resistance to acids.
Stainless Steel – Grade 904l (Uns N
They could clearly see that gold and platinum watches didn’t have this corrosion problem, so it wanted fixing. In 2003 their entire manufacturing line modified to 904L, though it was as early as 1988 that they released their first 904L metal watch with several variations of the Sea-Dweller. Grade 904L stainless steels has excellent resistance to seawater and in addition towards chloride attack.
Corrosion Resistance
The excessive resistance of grade 904L towards stress corrosion cracking is because of the presence of excessive quantities of nickel in its composition. Moreover, the addition of copper to those grades develops resistance to sulphuric acid and other decreasing brokers in each aggressive and gentle conditions.
For many, every scratch is taken into account a battle scar from life’s daily grind, or from a very adventuresome event. There was a time after I used to fret over a brand new scratch and thought of sprucing it out, but now, I simply allow them A240 304L Stainless steel plate to pile up. A Rolex with scratches reveals patina, character, and that the watch was used as it was supposed. When looking at a pre-owned Rolex, the scratches indicate a storyline that only the watch can tell. 361L metal is the trade standard metal for wristwatches.