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.
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        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.
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  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
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           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.
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           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.