need explain for a warning

Hi,

while running i've got this warning message in my screen:

"WARNING CAESAR II's provided material allowables are based on 100 deg (Fahrenheit) increments, which may result in minor diggerences from the code provided values based 50 deg (Fahrenheit) increments."


knowing that:
MATERIAL: API 5L Grade B
TEMPERATURE: 400° C
PRESSURE: 400 MPa

would anybody give me an explanation for this warning ?

& thnx in advance !!

Example given...

T= 100°F || 200°F
---------------------------
S= 20.0 kpsi || 15.0 kpsi

To find S at 150°F, C2 would use linear interpolation and arrive at 17.5 kpsi

However the code may give the following data because test data showed a slightly non-linear behavior between 100 and 200°F.

T= 100°F || 150°F || 200°F
-------------------------------------
S= 20.0 kpsi || 17.7 kpsi || 15.0 kpsi

Steve Perry,

thank you..i really do appreciate that !