Ask about the differences between various materials
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S30403/S30408/S30409, which are commonly referred to as 304L, 304, and 304H – what are the differences between these materials, and in what environments are they used? Are the size differences between XXX, XXXL, and XXXH usually the same in materials as well?
Regarding the materials mentioned by the original poster, it’s common for many people to have difficulty distinguishing between S30408/S30409, but there is a significant difference between 304L and these two. Simply put, the three grades have different carbon contents. This leads to a series of changes, including the material’s corrosion resistance, high-temperature resistance, and so on. S30408 and S30409 are often two grades that meet the chemical composition requirements of both materials.