Stainless 321 is a heat resistant, titanium stabilized, austenitic alloy that’s commonly used for service in the 1000°-1600°F temperature range. 321 stainless is primarily used in applications that involve continuous and intermittent service temperatures within the carbide precipitation range of 800°-1500°F. Type 321 is similar to type 304 stainless but with a titanium addition of at least five times the carbon content. This titanium addition reduces or prevents carbide precipitation during welding and in the 800°-1500°F service conditions. In order to provide optimum resistance to intergranular corrosion and to polythionic acid stress corrosion cracking in service temperatures at 1500°-1650°F an air cool may be used.
What are the characteristics of 321 Stainless?
Oxidation resistant to 1600°F
Stabilized against weld heat affected zone (HAZ) intergranular corrosion
The lower and upper values for each dimension are respectively the average and minimum thicknesses required. The average thickness cannot be lower than the value mentioned. The minimum values are allowed in limited areas.
The lower and upper values for each dimension are respectively the minimum and maximum tolerances.
The dimensions are in millimeters Source : ASME B16.11 – 2009
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ASME B16.11 ASTM A403 F316L Socket Welding Cap 2" 3000#
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