18-8 Stainless Steel Flat Washer, #0 Hole Size, 0.067" ID, 0.170" OD, 0.010" Nominal Thickness, Made in US: Amazon.com: Industrial & Scientific

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Acidic solutions can be taken into two basic categories: minimizing acids, such as hydrochloric acid and dilute sulfuric acid, and oxidizing acids, such as nitric acid and concentrated sulfuric acid. Increasing chromium and molybdenum content offers increased resistance to reducing acids while increasing chromium and silicon content offers increased resistance to oxidizing acids.

At space temperature level, Type 304 stainless-steel is just resistant to 3% acid, while Type 316 is resistant to 3% acid approximately 50 C (122 F) and 20% acid at space temperature level. Therefore Type 304 SS is seldom utilized in contact with sulfuric acid. Type 904L and Alloy 20 are resistant to sulfuric acid at even greater concentrations above room temperature level.

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At high concentrations and elevated temperatures, attack will happen, and higher-alloy stainless steels are required. In general, natural acids are less destructive than mineral acids such as hydrochloric and sulfuric acid. As the molecular weight of organic acids increases, their corrosivity decreases. Formic acid has the most affordable molecular weight and is a weak acid.

Type 316 is frequently utilized for storing and managing acetic acid, a commercially essential organic acid. Type 304 and Type 316 stainless-steels are untouched by weak bases such as ammonium hydroxide, even in high concentrations and at high temperatures. The same grades exposed to more powerful bases such as sodium hydroxide at high concentrations and heats will likely experience some etching and splitting.

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The Ultimate Guide To 18-8 Stainless Steel Flat Washer, #0 Hole Size, 0.067" ID, 0.170"

Organics [edit] All grades withstand damage from aldehydes and amines, though in the latter case Type 316 is more effective to Type 304; cellulose acetate damages Type 304 unless the temperature level is kept low. Read This and fats just affect Type 304 at temperatures above 150 C (302 F) and Type 316 SS above 260 C (500 F), while Type 317 SS is unaffected at all temperatures.