Material type of structural tube

Many variable factors represent medium erosion characteristics, namely chemical products and their concentration, atmospheric conditions, temperature, time, so if do not understand the exact nature of the medium, to make use of materials, choice of materials is difficult. However, the following guidelines can be used as selection:

304 throughout the material utilization. In buildings can withstand general corrosion, can withstand food processing etching medium (containing concentrated acid but high temperature and chloride content may appear erosion), organic compounds, dyes, and across a variety of inorganic compounds can resist.

304L (low carbon) with good resistance to nitric acid, and durable medium temperature and concentration of sulfuric acid, used as a liquid throughout the gas tank, used for cryogenic equipment (304N), the rest of the consumer appliance products, kitchen equipment, hospital equipment, transport tools, water handling equipment.

316 contains a nickel slightly more than 304, and containing 2% ─3% molybdenum, corrosion resistance than Type 304, is biased in favor of special points of erosion caused by chloride media. 316 has been used as a development sulphite pulp machine, because it is durable sulfate compound. Moreover, its use has been enlarged to handle a lot of chemical products in the processing industry.

317 containing 3% -4% molybdenum (high level in this series are also obtained), and contains more than 316 types of chromium, has a higher resistance to pitting corrosion and crevice corrosion performance.

430 lower than the 304 alloy content, is used in a warm atmosphere decorated with highly polished uses, can also be used nitric acid and food processing equipment.

410 has three generalized use of stainless steel in the lowest alloy content, you need strength and corrosion resistance with high load-bearing components used, such as solid pieces. 410 in a warm atmosphere, water, gas and chemical products in the media many moderate corrosion resistance.

2205 than the 304 and 316 superior, because the structure of his pipe chloride stress corrosion cracking has a high strength to resist.