All About 316l Vs 904l Stainless Steel In Watches

We produce 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.

Rolex produces fairly a excessive variety of watches per year. Nobody exterior Rolex (or Wilsdorf foundation) knows the exact quantity, but our estimate is between 800.000 and 950.000 watches a year. We also suppose that this quantity is ‘dynamic’, which implies they can go up and down depending on the financial local weather. We’ve seen some years that weren’t straightforward, in all probability additionally not for Rolex.

After casting and inspection, the metal is then re-melted in a vacuum to purify it and eliminate any inclusions that may diminish its corrosion resistance and result in problems in sharpening. Rolex calls 904L stainless-steel a “corrosion-resistant superalloy.” 904L differs from 316L because of further Chromium, Molybdenum, Nickel, and Copper that provides it improved resistance to acids.

For a cloth to be thought-about chrome steel, at least 10.5% of the make-up should be chromium. Additional alloys usually include nickel, titanium, aluminum, copper, nitrogen, phosphorous, selenium and molybdenum. The key distinction between the 304 and the 316L is the addition of molybdenum within the 316L. It is the molybdenum that enhances corrosion resistance in environments wealthy in salt air and chloride – giving 316L the moniker of “marine grade” stainless-steel.

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Our stainless production range

• Rolex calls 904L stainless steel a “corrosion-resistant superalloy.” 904L differs from 316L due to additional Chromium, Molybdenum, Nickel, and Copper which supplies it improved resistance to acids.
• Harder and extra rust and corrosion-resistant than other steels, this 904L metal can take and hold a polish extremely properly.
• This is why steel Rolex watches look totally different than other metal watches.
• 316L is taken into account a tougher, more durable, “marine grade” metal, however it does not have luster and acid resistance of 904L.

Vs 904l Composition

Unlike the remainder of the business, Rolex utilizes 904L stainless steel for qualities that Rolex believes surpasses the industry normal. Grade 904L stainless steels have wonderful resistance to heat seawater and chloride attack. The excessive resistance of grade 904L in opposition to stress corrosion cracking is because of the presence of excessive amounts of nickel in its composition. Moreover, the addition of copper to these grades develops resistance to sulphuric acid and different decreasing agents in both aggressive and delicate circumstances. In addition to watches, this alloy can also be generally used within the meals business, the medical field, and all kinds of water and marine purposes.

Rolex calls 904L stainless-steel a “corrosion-resistant superalloy.” 904L differs from 316L because of additional Chromium, Molybdenum, Nickel, and Copper which provides it improved resistance to acids. 316L is taken into account a tougher, harder, “marine grade” steel, however it doesn’t have luster and acid resistance of 904L. Rolex makes use of 904L with the greatest of high quality control.

316L is considered a harder, tougher, “marine grade” metal, nevertheless it doesn’t have luster and acid resistance of Rolex’s 904L stainless steel. Rolex aficionados have commented that some individuals sweat extra acidic than others as demonstrated by finding pits in 316L wrist watches making 904L stainless more desirable. Noble metallic wristwatches such as gold or platinum watches wouldn’t have corrosion points, however base metallic does. Until the widespread use of chrome steel, older watches utilized primitive stainless casebacks and some kind of base-steel case.

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Grade 904L stainless steels offer good oxidation resistance. However, the structural stability of this grade collapses at high temperatures, significantly above four hundred°C. Grade 904L chrome steel is a non-stabilized austenitic chrome steel with low carbon content material. This high alloy chrome steel is added with copper to improve its resistance to strong reducing acids, corresponding to sulphuric acid. The metal can also be immune to stress corrosion cracking and crevice corrosion.

We have thousands tons stock of stainless steel sheet and coil with various size and grade,mainly include austenitic stainless steel, martens stainless steel (including precipitation hardened stainless steel sheet & coil), ferritic stainless steel, and duplex stainless steel.

Characteristics of Stainless Steel Sheet and Plate:
High corrosion resistance
High strength
High toughness and impact resistance
Temperature resistance
High workability, including machining, stamping, fabricating and welding
Smooth surface finish that can be easily clean