Sam,
I remember this material is available in B31.3. most probably it will be available in B31.1 also. check out Table A-1. this material is having 1.25 cr, so you will get the allowable details in "Low and Intermediate Alloy steel" column of Table A-1.
Take the allowable values from code for your temp limit and make your own material data base in caesar for this material. procedure for making new material data base is already available in Caesar Help menu.
_________________________
Raju Soni
New Delhi, India