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Noah Holcomb Noah Holcomb is offline
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Join Date: Mar 2007
Location: Chattanooga, TN
Posts: 167
Some good reading, I would source some info from a few excellent material science books but I am already home from work.



In short 304 and 321 perform similar in many conditions. 321 really starts to shine at temperature of 600 C (1112 F) and up. The only difference in the composition of the two is 321 alloy has small trace amounts of Titanium. 321 does have a higher hardness value (not by much) If there are no plans to post-weld annealed it is easier to make welds that survive with 321 than 304 when the temperatures start to rise. 321 and 304 are very similar in terms of behaviors at lower temp ranges.

Last edited by Noah Holcomb; 06-01-2007 at 02:11 PM..
Old 06-01-2007, 01:40 PM
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