metengr, MJCronin & ijezer,
Many thanks for your response.
I had done some survey on internet prior to posting this question. API 530 does provide allowable stresses above 1400F. I am looking for the allowable stress values from 70F to 1400F.
If you are aware of the source where I can get...
I am looking for Allowable Stress Values (below and in rupture / creep range) for A 351 HK 40 castings used for supports in fired heaters.
Would appreciate if you can provide some reference.
Thanks