The stainless steel band/ bracelet is the preferred band/ bracelet material for many consumers. The brand emphasizes that its stainless steel watch band/ bracelet is 316 steel and 316L stainless steel. Faced with these incomprehensible technical terms, are you confused? Common stainless steel watch strap types: 304, 316, 316L.
304, 316 and others are based on the name of the American steel number. Most watches now use stainless steel band/ bracelet, which is more durable, but the disadvantage is that they are easily scratched.
1. The material of stainless steel watch band/ bracelet: 304 steel
304 steel is universal stainless steel and is the most commonly used stainless steel. Usually used in low-end watch cases and band/ bracelet. As a widely used steel, 304stainless steel watch band/ bracelet has good corrosion resistance, heat resistance, low-temperature strength, and mechanical properties; good hot workability such as stamping and bending, and no heat treatment hardening phenomenon. 304 steel also has deficiencies in performance: large section size steel is sensitive to intergranular corrosion after welding; very sensitive to stress corrosion in CL-containing water (including wet atmosphere); low mechanical strength, poor cutting performance, etc.
2. The material of stainless steel watch band/ bracelet: 316 steel
316 steel is different from 304 steel, 316 has 2% more molybdenum. In this way, the corrosion resistance of 316, especially the corrosion resistance of chloride ions, is better than that of 304, but the price is about 20% higher. 316 is a low carbon stainless steel, and its weldability is also better than 304. Moreover, stainless steel contains molybdenum, so its corrosion resistance in marine and chemical industry environments is much better than 304 stainless steel. This is especially important for stainless steel straps, especially watches with diving functions.
3. The material of stainless steel watch band/ bracelet: 316L stainless steel
306L stainless steel is not a strict word in material science, it is a modified word of the business to a large extent. Compared with 316L and 316, the biggest difference is that the carbon content is controlled at ≤0.03%, and "L" is exactly The meaning of Low Carbon. Therefore, 316L has better corrosion resistance after welding, and the texture is very good. The main components are Fe, Cr, Ni, and Mo, and the density is close to that of iron. Among stainless steel watch strap materials, it is high-end, and 95% of high-end watches usually use this material to make the case, crown, and strap.
Rolex used 904L stainless steel after 2001, and they have their own dedicated small steelmaking production line for their own brand, which is rare in the watch industry. Before that, they also used 316L stainless steel. 904L stainless steel is a super heat-resistant stainless steel alloy with a chromium content of 19~23%, a nickel content of 23~28%, and a molybdenum content of 4~5%. The content of chromium, nickel and molybdenum is higher than that of 316L, while the carbon content is lower than 0.02%. This combination of high alloyed low carbon components makes its corrosion resistance better than 316L in any service environment.