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1994-11-01
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78 lines
Cyclic Oxidation Resistance
WEIGHT GAIN - GRAMS PER SQUARE METER OF SURFACE
FOR TEMPERATURES SHOWN
ALLOY 705C 815C 980C 1090C
409 0.1 0.8 1430* 10,000*
430 0.4 1.3 1660* 10,000*
304 0.2 1.7 3400 10,000*
309 0.2 2.7 120 910
NOTE: These were cyclic tests for 100 hours duration in air containing
10% water vapor. Cycled every 2 hours to room temperature then
back to test temperature. Weight gain (or loss) measured without
purposeful removal of scale.
Some of the higher temperature tests, indicated by *, were for
much shorter time than the 100 hours.
_________________________________________________________________________
TENSILE and YIELD STRENGTH AT TEMPERATURES SHOWN (ksi)
24C 540C 650C
ALLOY Tensile Yield Tensile Yield Tensile Yield
304 87 39 55 18 44 16
309S 90 45 67 36 54 28
310 95 45 70 24 58 19
316 84 40 67.5 28 55 24
321 79 31 57.5 26 45 21
347 95 40 60 20.5 50.5 20
* 403 110 75 65 52 87 No Data
* 410 125 108 75 No Data 20 No Data
NOTE: Alloys indicated by * were tested in heat treated condition,
others in annealed condition.
_________________________________________________________________________
1000 HOUR STRESS-RUPTURE AT TEMPERATURES SHOWN
ALLOY 538C 650C 815C
304 37 17 4
309S No Data 19 4
310S 32 18 6
316 No Data 24 7
347 49 23 4
410 19 No Data No Data
430 18 5 1
_________________________________________________________________________
GENERAL INFORMATION ON HIGH TEMPERATURE PROPERTIES:
Allowable stresses for austenitic (300 series) stainless steel unfired
pressure vessels are found in Section VIII of the ASME Boiler Code,
table UHA-23. Additional information on high temperature properties
can also be found in the ASM Metals Handbook, Volume 3, 10th Edition.
_________________________________________________________________________
POISSON'S RATIO AT TEMPERATURES SHOWN
TEMPERATURE
ALLOY 150C 260C 370C 480C 595C 705C 815C
304 0.28 0.30 0.32 0.28 0.29 0.28 0.25
309 0.28 0.30 0.30 0.29 0.27 0.32 0.25
310 0.32 0.31 0.31 0.32 0.34 0.34 0.29
316 0.26 0.29 0.34 0.30 0.32 0.31 0.24
321 0.23 0.25 0.27 0.30 0.29 0.27 No Data
347 0.30 0.31 0.29 0.33 0.31 0.35 0.28
By definition, Poisson's ratio is the ratio of lateral strain to
longitudinal strain for a material subjected to uniform longitudinal
stresses within the proportional limit.